Re: [PATCH] Use new sb type

2008-02-11 Thread Bill Davidsen
less and probably doesn't even need mdadm - heck he probably just echos the raw superblock into place via dd... http://xkcd.com/378/ I don't know why this makes me think of APL... -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still

Re: [PATCH] Use new sb type

2008-02-10 Thread Bill Davidsen
discussed names and Neil has expressed satisfaction with my earlier suggestion. Since @ is sort of a semi-special character to the shell, I suspect we are better off avoiding it. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid

Re: Any inexpensive hardware recommendations for PCI interface cards?

2008-02-08 Thread Bill Davidsen
inexpensive (probably SATA-II) PCI interface cards? Not I. Large drives have have cured me of FrankenRAID setups recently, other than to build little arrays out of USB devices for backup. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still

Re: Deleting mdadm RAID arrays

2008-02-08 Thread Bill Davidsen
Marcin Krol wrote: Thursday 07 February 2008 22:35:45 Bill Davidsen napisał(a): As you may remember, I have configured udev to associate /dev/d_* devices with serial numbers (to keep them from changing depending on boot module loading sequence). Why do you care? Because

Re: mdadm 2.6.4 : How i can check out current status of reshaping ?

2008-02-07 Thread Bill Davidsen
clearly have a hardware error. NeilBrown -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid

Re: using update-initramfs: how to get new mdadm.conf into the /boot? Or is it XFS?

2008-02-07 Thread Bill Davidsen
at boot, I don't need features or performance, I just want it to work. Unless you are so frustrated you have entered I am going to make this *work* if it takes forever mode, I would try the easy solution first. Just my take on it. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who

Re: Deleting mdadm RAID arrays

2008-02-07 Thread Bill Davidsen
? From what I read, it was the partitions. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message

Re: using update-initramfs: how to get new mdadm.conf into the /boot? Or is it XFS?

2008-02-07 Thread Bill Davidsen
Bill Davidsen wrote: Moshe Yudkowsky wrote: maximilian attems wrote: error 15 is an *grub* error. grub is known for it's dislike of xfs, so with this whole setup use ext3 rerun grub-install and you should be fine. I should mention that something *did* change. When attempting to use XFS

Re: raid10 on three discs - few questions.

2008-02-06 Thread Bill Davidsen
with one drive missing and add it later? I know, I should try it when I get a machine free... but I'm being lazy today. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe

Re: raid1 or raid10 for /boot

2008-02-06 Thread Bill Davidsen
without benefit is always a bad idea. I suggest that you avoid having a learning experience and stick with raid1. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from

Re: recommendations for stripe/chunk size

2008-02-06 Thread Bill Davidsen
, and I could even tolerate 512 MB ram used. But going to 1 MiB buffers would be overdoing it for my configuration. What would be the recommended chunk size for todays equipment? I think usage is more important than hardware. My opinion only. Best regards Keld -- Bill Davidsen [EMAIL PROTECTED

Re: raid10 on three discs - few questions.

2008-02-06 Thread Bill Davidsen
Jon Nelson wrote: On Feb 6, 2008 12:43 PM, Bill Davidsen [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: Can you create a raid10 with one drive missing and add it later? I know, I should try it when I get a machine free... but I'm being lazy today. Yes you can. With 3 drives

Re: recommendations for stripe/chunk size

2008-02-06 Thread Bill Davidsen
, to be precise). A nice graphics of the effect can be found here: https://www.amcc.com/MyAMCC/retrieveDocument/PowerPC/440SPe/RAIDinLinux_PB_0529a.pdf I started that online and pulled a download to print, very neat stuff. Thanks for the link. Best regards, Wolfgang Denk -- Bill Davidsen

Re: raid1 and raid 10 always writes all data to all disks?

2008-02-04 Thread Bill Davidsen
Keld Jørn Simonsen wrote: On Sun, Feb 03, 2008 at 10:56:01AM -0500, Bill Davidsen wrote: Keld Jørn Simonsen wrote: I found a sentence in the HOWTO: raid1 and raid 10 always writes all data to all disks I think this is wrong for raid10. eg a raid10,f2 of 4 disks only writes to two

Re: draft howto on making raids for surviving a disk crash

2008-02-04 Thread Bill Davidsen
Keld Jørn Simonsen wrote: On Sun, Feb 03, 2008 at 10:53:51AM -0500, Bill Davidsen wrote: Keld Jørn Simonsen wrote: This is intended for the linux raid howto. Please give comments. It is not fully ready /keld Howto prepare for a failing disk 6. /etc/mdadm.conf Something here on /etc

Re: draft howto on making raids for surviving a disk crash

2008-02-03 Thread Bill Davidsen
would be better of 2 disks, the system disks need not be prepared for more than 2 craches TYPO: s/craches/crashes/ or disk failures either, and you can use the rest of the disk IO capacity to speed up the system. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war

Re: raid1 and raid 10 always writes all data to all disks?

2008-02-03 Thread Bill Davidsen
mirror copies, in the raid10 case. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: raid problem: after every reboot /dev/sdb1 is removed?

2008-02-03 Thread Bill Davidsen
for whatever the system is doing. I don't know if ubuntu uses mkinitrd or what, but it clearly didn't get it right without a little help from you. thanks How about some input, ubuntu users (or Debian, isn't ubuntu really Debian?). On Sat, 02 Feb 2008 14:47:50 -0500 Bill Davidsen [EMAIL

Re: RAID 1 and grub

2008-02-03 Thread Bill Davidsen
that the fallback drive will be called hdc by the BIOS but will be hdd in the system. That was with RHEL3, but worth testing. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe

Re: raid problem: after every reboot /dev/sdb1 is removed?

2008-02-02 Thread Bill Davidsen
unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark

Re: In this partition scheme, grub does not find md information?

2008-02-02 Thread Bill Davidsen
Bill Davidsen wrote: Moshe Yudkowsky wrote: Michael Tokarev wrote: To return to that peformance question, since I have to create at least 2 md drives using different partitions, I wonder if it's smarter to create multiple md drives for better performance. /dev/sd[abcd]1 -- RAID1

Re: In this partition scheme, grub does not find md information?

2008-01-31 Thread Bill Davidsen
configuration. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More

Re: In this partition scheme, grub does not find md information?

2008-01-31 Thread Bill Davidsen
tmpfs (no need, until now); but I wonder how you create the devices you need when you're doing a rescue. When you start udev, your /dev will be on tmpfs. Sure, that's what mount shows me right now -- using a standard Debian install. What did you suggest I change? -- Bill Davidsen [EMAIL

Re: which raid level gives maximum overall speed? (raid-10,f2 vs. raid-0)

2008-01-31 Thread Bill Davidsen
-- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http

Re: In this partition scheme, grub does not find md information?

2008-01-30 Thread Bill Davidsen
Moshe Yudkowsky wrote: Bill Davidsen wrote: According to man md(4), the o2 is likely to offer the best combination of read and write performance. Why would you consider f2 instead? f2 is faster for read, most systems spend more time reading than writing. According to md(4), offset should

Re: In this partition scheme, grub does not find md information?

2008-01-30 Thread Bill Davidsen
Peter Rabbitson wrote: Keld Jørn Simonsen wrote: On Tue, Jan 29, 2008 at 06:44:20PM -0500, Bill Davidsen wrote: Depending on near/far choices, raid10 should be faster than raid5, with far read should be quite a bit faster. You can't boot off raid10, and if you put your swap on it many

Re: 2.6.24-rc6 reproducible raid5 hang

2008-01-29 Thread Bill Davidsen
... Unfortunately the bitmap and rai1 patch don't go in .22.16. Neil, have these been sent up against 24-stable and 23-stable? -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark

Re: striping of a 4 drive raid10

2008-01-28 Thread Bill Davidsen
will see any major improvements without a kernel upgrade. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body

Re: idle array consuming cpu ??!!

2008-01-23 Thread Bill Davidsen
Carlos Carvalho wrote: Bill Davidsen ([EMAIL PROTECTED]) wrote on 22 January 2008 17:53: Carlos Carvalho wrote: Neil Brown ([EMAIL PROTECTED]) wrote on 21 January 2008 12:15: On Sunday January 20, [EMAIL PROTECTED] wrote: A raid6 array with a spare and bitmap is idle: not mounted

Re: One Large md or Many Smaller md for Better Peformance?

2008-01-22 Thread Bill Davidsen
intermittent power supplies in the system, the UPS was swapped on general principles and the real problem was isolated. Shit happens, don't rely on graceful shutdowns (or recovery, have backups). -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason

Re: idle array consuming cpu ??!!

2008-01-22 Thread Bill Davidsen
the bitmap stopped cpu consumption. Looks like quite a bit of CPU going into idle arrays here, too. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send

Re: One Large md or Many Smaller md for Better Peformance?

2008-01-20 Thread Bill Davidsen
of documentation that the performance can be counter-intuitive. I've even considered the possibility of giving /var and /usr separate RAID arrays (data vs. executables). If an expert could chime in, I'd appreciate it a great deal. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war

Re: how to create a degraded raid1 with only 1 of 2 drives ??

2008-01-20 Thread Bill Davidsen
two drives and one as missing. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: Linux Software RAID 5 + XFS Multi-Benchmarks / 10 Raptors Again

2008-01-18 Thread Bill Davidsen
back on if I can kill the resync process w/out deadlock. So does that indicate that there is still a deadlock issue, or that you don't have the latest patches installed? -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when

Re: md rotates RAID5 spare at boot

2008-01-10 Thread Bill Davidsen
. - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when

Re: Raid 1, can't get the second disk added back in.

2008-01-08 Thread Bill Davidsen
, lsof doesn't seem to show files used in loop mounts. Yes, long shot... -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux

Re: Last ditch plea on remote double raid5 disk failure

2007-12-31 Thread Bill Davidsen
from running (or starting). I don't think that should be default, but there are times when some data is way better than none. I would think the options are fail the drive, set the array r/o, and return an error and keep going. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes

Re: On the subject of RAID-6 corruption recovery

2007-12-28 Thread Bill Davidsen
of opportunistically. If this means that there can be no false positives for multidisk corruption but may be false negatives, fine. If it means something else, please restate one more time. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still

Re: raid5 grow reshaping speed is unchangeable

2007-12-27 Thread Bill Davidsen
. Is this the maximum speed? Something else going on, I do better than that adding drives on USB! I don't have a clue what the issue is, and I don't see anything in your information which looks unusual. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason

Re: raid5 grow reshaping speed is unchangeable

2007-12-27 Thread Bill Davidsen
think there will be a benefit, either. The problem with RHEL is that while it's stable in terms of bug fixes, it also doesn't get any performance benefits. Why not wait until Neil gets back from the holiday and see if he has any words of advice? -- Bill Davidsen [EMAIL PROTECTED] Woe unto

Re: Linux RAID Partition Offset 63 cylinders / 30% performance hit?

2007-12-25 Thread Bill Davidsen
performance for write. And doing small writes can result in paying the RAR penalty on every write. So there may be a measurable benefit to getting that alignment right at the drive level. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still

Re: raid10: unfair disk load?

2007-12-25 Thread Bill Davidsen
this configuration to offer very good performance, at the cost of slightly more complexity. It does, raid0 can be striped over many configurations, raid[156] being most common. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when

Re: Raid over 48 disks

2007-12-25 Thread Bill Davidsen
of inodes in play. While the bitmap resolution is a factor, it's pretty linear, fsck with lots of files gets really slow. And let's face it, the objective of raid is to avoid doing that fsck in the first place ;-) -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without

Re: help diagnosing bad disk

2007-12-20 Thread Bill Davidsen
sda2[2] sdb2[1] 974808064 blocks [2/1] [_U] [] recovery = 0.0% (86848/974808064) finish=186.9min speed=86848K/sec md0 : active raid1 sdb1[1] sda1[0] 1951744 blocks [2/2] [UU] unused devices: none -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman

Re: Raid over 48 disks

2007-12-20 Thread Bill Davidsen
Thiemo Nagel wrote: Bill Davidsen wrote: 16k read64k write chunk sizeRAID 5RAID 6RAID 5RAID 6 128k492497268270 256k615530288270 512k625607230174 1024k 65062017075 What is your stripe cache

Re: Raid over 48 disks

2007-12-19 Thread Bill Davidsen
230174 1024k 65062017075 What is your stripe cache size? -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line

Re: Raid over 48 disks

2007-12-19 Thread Bill Davidsen
almost as much data space as with the 6 8-disk raid6s, and have a separate pair of disks for all the small updates (logging, metadata, etc), so this makes alot of sense if most of the data is bulk file access. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without

Re: ERROR] scsi.c: In function 'scsi_get_serial_number_page'

2007-12-19 Thread Bill Davidsen
Thierry Iceta wrote: Hi I would like to use raidtools-1.00.3 on Rhel5 distribution but I got thie error Could you tell me if a new version is available or if a patch exists to use raidtools on Rhel5 raidtools is old and unmaintained. Use mdadm. -- Bill Davidsen [EMAIL PROTECTED] Woe unto

Re: Linux RAID Partition Offset 63 cylinders / 30% performance hit?

2007-12-19 Thread Bill Davidsen
. However, a poor choice of chunk size, cache_buffer size, or just random i/o in small sizes can eat up a lot of the benefit. I don't think you need to give up your partitions to get the benefit of alignment. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason

Re: help diagnosing bad disk

2007-12-19 Thread Bill Davidsen
it. ;-) -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info

Re: Linux RAID Partition Offset 63 cylinders / 30% performance hit?

2007-12-19 Thread Bill Davidsen
Justin Piszcz wrote: On Wed, 19 Dec 2007, Bill Davidsen wrote: Justin Piszcz wrote: On Wed, 19 Dec 2007, Mattias Wadenstein wrote: On Wed, 19 Dec 2007, Justin Piszcz wrote: -- Now to my setup / question: # fdisk -l /dev/sdc Disk /dev/sdc: 150.0 GB, 150039945216 bytes 255 heads

Re: Kernel 2.6.23.9 / P35 Chipset + WD 750GB Drives (reset port)

2007-12-13 Thread Bill Davidsen
Tejun Heo wrote: Bill Davidsen wrote: Jan Engelhardt wrote: On Dec 1 2007 06:26, Justin Piszcz wrote: I ran the following: dd if=/dev/zero of=/dev/sdc dd if=/dev/zero of=/dev/sdd dd if=/dev/zero of=/dev/sde (as it is always a very good idea to do this with any new disk

Re: mdadm break / restore soft mirror

2007-12-13 Thread Bill Davidsen
, it will only be a pretty good backup. I suggest looking at things like rsync, which will not solve the changing data problem, but may do the backup quickly enough to be as useful as what you propose. Of course a full backup is likely to take a long time however you do it. -- Bill Davidsen

Re: unable to remove failed drive

2007-12-10 Thread Bill Davidsen
sure others will have some ideas on this, if it were mine a backup would be my first order of business. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list

Re: Reading takes 100% precedence over writes for mdadm+raid5?

2007-12-06 Thread Bill Davidsen
in the next two days, I will turn on some measurements when I do. But if you are just investigating this behavior, perhaps you could retry with a single read from a file rather than the device. [...snip...] -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason

Re: raid6 check/repair

2007-12-05 Thread Bill Davidsen
) which finds these problems, why not a tools to fix them? BTW: if this can be done in a user program, mdadm, rather than by code in the kernel, that might well make everyone happy. Okay, realistically less unhappy. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war

Re: Kernel 2.6.23.9 / P35 Chipset + WD 750GB Drives (reset port)

2007-12-01 Thread Bill Davidsen
and after doing this, that's a good idea as well. S.M.A.R.T is your friend. And when writing /dev/zero to a drive, if it craps out you have less emotional attachment to the data. -- Bill Davidsen [EMAIL PROTECTED] We have more to fear from the bungling of the incompetent than from

Re: raid6 check/repair

2007-11-29 Thread Bill Davidsen
clearly that I have a problem and what it is. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message

Re: Abysmal write performance on HW RAID5

2007-11-29 Thread Bill Davidsen
have any ideas? You will get more and maybe better, but this is a start just to see if the problem responds to obvious changes. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark

Re: raid6 check/repair

2007-11-26 Thread Bill Davidsen
suspect it's a sizable subset. -- Bill Davidsen [EMAIL PROTECTED] Woe unto the statesman who makes war without a reason that will still be valid when the war is over... Otto von Bismark - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: HELP! New disks being dropped from RAID 6 array on every reboot

2007-11-24 Thread Bill Davidsen
list partitions by name? If you change to PARTITIONS in /etc/mdadm.conf it won't bite you until you change the detected partitions so they no longer match what was correct at install time. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers

Re: md RAID 10 on Linux 2.6.20?

2007-11-23 Thread Bill Davidsen
read performance. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org

Re: raid5 failure + libata irq: nobody cared

2007-11-19 Thread Bill Davidsen
-info.html -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org

Re: Building a new raid6 with bitmap does not clear bits during resync

2007-11-14 Thread Bill Davidsen
benefits. This would effect both normal clean-bit writeback and during-resync clean-bit-writeback. Hope that clarifies my approach. Easy to implement and understand is always a strong point, and a user can make an informed decision. Thanks for the discussion. -- bill davidsen [EMAIL

Re: Proposal: non-striping RAID4

2007-11-14 Thread Bill Davidsen
motion is spread over all drives. Don't have time to look at that one, either, but it really helps performance under load with small arrays. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send

Re: PROBLEM: raid5 hangs

2007-11-14 Thread Bill Davidsen
during save. I could read from it however. My homedir isnt on raid5 but its encrypted. Its not on any disk that has to do with raid. This problem didnt happend when I used 2.6.18. Currently I use 2.6.18 as I kinda need the computer stable. After reboot it rebuilded the raid5. -- bill davidsen

Re: Building a new raid6 with bitmap does not clear bits during resync

2007-11-12 Thread Bill Davidsen
slice. Not a suggestion, but a request for your thoughts on that. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED

Re: Raid5 assemble after dual sata port failure

2007-11-11 Thread Bill Davidsen
. David PS Don't get the ddrescue parameters the wrong way round if you go that route... - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html -- bill davidsen [EMAIL

Re: Proposal: non-striping RAID4

2007-11-11 Thread Bill Davidsen
, not as proposed code for review. Much as I generally like adding functionality, I *really* can't see much in this idea. It seems to me to be in the clever but not useful category. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since

Re: Was: [RFC PATCH 2.6.23.1] md: add dm-raid1 read balancing

2007-11-08 Thread Bill Davidsen
before posting... -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http

Re: Was: [RFC PATCH 2.6.23.1] md: add dm-raid1 read balancing

2007-11-08 Thread Bill Davidsen
this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: 2.6.23.1: mdadm/raid5 hung/d-state

2007-11-08 Thread Bill Davidsen
, as mine only seems to manifest with RAID5+XFS. The RAID rebuilds with no problem, and I've not had any problems with RAID5+ext3. Hopefully it's not the raid which is the issue. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: Superblocks

2007-11-03 Thread Bill Davidsen
is the default type of superblock? 0.90 or 1.0? The default default is 0.90. However a local device can be set in mdadm.conf with e.g. CREATE metdata=1.0 NeilBrown -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: switching root fs '/' to boot from RAID1 with grub

2007-11-03 Thread Bill Davidsen
, if the drive is dead almost every BIOS will fail over, if the read gets a CRC or similar most recent BIOS will fail over, but if an error-free read returns bad data, how can the BIOS know. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers

Re: switching root fs '/' to boot from RAID1 with grub

2007-11-03 Thread Bill Davidsen
H. Peter Anvin wrote: Bill Davidsen wrote: Depends how bad the drive is. Just to align the thread on this - If the boot sector is bad - the bios on newer boxes will skip to the next one. But if it is good, and you boot into garbage - - could be Windows.. does it crash? Right

Re: Superblocks

2007-11-02 Thread Bill Davidsen
for clarity, they need to be accepted here, as well. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo

Re: stride / stripe alignment on LVM ?

2007-11-02 Thread Bill Davidsen
, but will overlap chunks and cause all the data from all chunks to be read back for a new raid-5 calculation. So I would expect this to make a very large performance difference, so even if it work it would do so slowly. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing

Re: Implementing low level timeouts within MD

2007-11-02 Thread Bill Davidsen
have very long uptimes, I'm reasonably sure you haven't updated the kernel to get fixes installed. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid

Re: Time to deprecate old RAID formats?

2007-11-02 Thread Bill Davidsen
of the v1 superblock, which itself is a revision of the v0... Like kernel releases, people assume that the first number means *big* changes, the second incremental change. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: doesm mdadm try to use fastest HDD ?

2007-11-02 Thread Bill Davidsen
, replace the slow drive 2 - for most things you do, I would expect seek to be more important than transfer rate -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid

Re: Raid-10 mount at startup always has problem

2007-11-01 Thread Bill Davidsen
- with initrd. At least I THINK I'm using initrd - I have an image, but I don't see an initrd line in my grub config. HmmI'm going to add a stanza that includes the initrd and see what happens also. What did that do? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing

Re: Implementing low level timeouts within MD

2007-11-01 Thread Bill Davidsen
would fail and glitch the SCSI bus such that the next i/o to another drive would fail. And I've had SATA drives fail cleanly on small machines, so neither is an always config. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: Implementing low level timeouts within MD

2007-11-01 Thread Bill Davidsen
. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html

Re: Requesting migrate device options for raid5/6

2007-11-01 Thread Bill Davidsen
error. I certainly always write down steps before doing migrate, and if possible do it with the system booted from a rescue media. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line

Re: Raid-10 mount at startup always has problem

2007-10-29 Thread Bill Davidsen
Luca Berra wrote: On Sun, Oct 28, 2007 at 08:21:34PM -0400, Bill Davidsen wrote: Because you didn't stripe align the partition, your bad. Align to /what/ stripe? Hardware (CHS is fiction), software (of the RAID the real stripe (track) size of the storage, you must read the manual

Re: Raid-10 mount at startup always has problem

2007-10-28 Thread Bill Davidsen
a performance benefit. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org

Re: Time to deprecate old RAID formats?

2007-10-28 Thread Bill Davidsen
partition is read (assuming you use one) restrictions go away. Performance of /boot is not much of an issue, for me at least, but more complex setups are sometimes need for the rest of the system. Thanks for the research. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing

Re: Time to deprecate old RAID formats?

2007-10-27 Thread Bill Davidsen
Doug Ledford wrote: On Fri, 2007-10-26 at 10:18 -0400, Bill Davidsen wrote: [___snip___] Actually, after doing some research, here's what I've found: * When using lilo to boot from a raid device, it automatically installs itself to the mbr, not to the partition. This can

Re: Software RAID when it works and when it doesn't

2007-10-27 Thread Bill Davidsen
hardware RAID (ServeRAID), so I can only assume that failure would be noted. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: Time to deprecate old RAID formats?

2007-10-26 Thread Bill Davidsen
.start, 1.end, and 1.4k in the beginning? Isn't hindsight wonderful? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED

Re: Raid-10 mount at startup always has problem

2007-10-25 Thread Bill Davidsen
, but an mdadm and a mount-by-label scan could probably do it too. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: Time to deprecate old RAID formats?

2007-10-25 Thread Bill Davidsen
me, but I will take a look at it. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http

Multipath and nbd

2007-10-25 Thread Bill Davidsen
traffic through the dedicated link? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http

Re: Time to deprecate old RAID formats?

2007-10-24 Thread Bill Davidsen
John Stoffel wrote: Bill == Bill Davidsen [EMAIL PROTECTED] writes: Bill John Stoffel wrote: Why do we have three different positions for storing the superblock? Bill Why do you suggest changing anything until you get the answer to Bill this question? If you don't

Re: Software RAID when it works and when it doesn't

2007-10-24 Thread Bill Davidsen
Alberto Alonso wrote: On Tue, 2007-10-23 at 18:45 -0400, Bill Davidsen wrote: I'm not sure the timeouts are the problem, even if md did its own timeout, it then needs a way to tell the driver (or device) to stop retrying. I don't believe that's available, certainly not everywhere

Re: [BUG] Raid1/5 over iSCSI trouble

2007-10-24 Thread Bill Davidsen
not as fast as you would like. By Saturday a solution may emerge. Please note that I won't read my mails until next saturday morning (CEST). -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from

Re: Time to deprecate old RAID formats?

2007-10-24 Thread Bill Davidsen
. There really may be no right answer. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http

Re: very degraded RAID5, or increasing capacity by adding discs

2007-10-23 Thread Bill Davidsen
that. ;-) -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo

Re: Software RAID when it works and when it doesn't

2007-10-23 Thread Bill Davidsen
, it then needs a way to tell the driver (or device) to stop retrying. I don't believe that's available, certainly not everywhere, and anything other than everywhere would turn the md code into a nest of exceptions. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things

Re: Time to deprecate old RAID formats?

2007-10-23 Thread Bill Davidsen
to mention, why even bring this up? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More majordomo info

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