Re: split RAID1 during backups?

2005-10-25 Thread Bill Davidsen
to dramatically raise backup speeds. Cheers, Jeff [1] http://www.jab.org/dmesg - 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: split RAID1 during backups?

2005-10-27 Thread Bill Davidsen
. Finally, I'm not going to focus on incremental backups if there's any prayer of getting a 500GB full backup in 3 hours. Full backups provide a LOT of warm fuzzies. Again, thank you all very much. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things

Re: udev and mdadm -- I'm lost

2005-11-16 Thread Bill Davidsen
, or whatever. -- 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

RAID-6

2005-11-16 Thread Bill Davidsen
with a distributed hot spare, AKA RAID-5E, which spreads head motion to all drives for performance. Any clarification on this? -- 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: Poor Software RAID-0 performance with 2.6.14.2

2005-11-22 Thread Bill Davidsen
at the stats to see if that's happening. I added the raid M/L to the addresses, since this is getting to be general RAID question. -- -bill davidsen ([EMAIL PROTECTED]) The secret to procrastination is to put things off until the last possible moment - but no longer -me - To unsubscribe from

Re: Poor Software RAID-0 performance with 2.6.14.2

2005-11-23 Thread Bill Davidsen
Paul Clements wrote: Bill Davidsen wrote: One of the advantages of mirroring is that if there is heavy read load when one drive is busy there is another copy of the data on the other drive(s). But doing 1MB reads on the mirrored device did not show that the kernel took advantage

Re: Booting from raid1 -- md: invalid raid superblock magic on sdb1

2005-12-03 Thread Bill Davidsen
with the following command: mdadm --create /dev/md_d0 -e1 -ap --level=1 --raid-devices=2 missing,/dev/sdb1 The raid created correctly, I then partitioned md_d0 to match sda1. I hope that's a typo... you need to partition sdb, not the md_d0 raid device. -- bill davidsen [EMAIL PROTECTED] CTO TMR

Re: building a disk server

2005-12-03 Thread Bill Davidsen
with time as new stuff comes out. -- 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: stripe_cache_size ?

2005-12-12 Thread Bill Davidsen
is helped a lot, read speed isn't. Maybe I should try iozone... NeilBrown -- 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

Re: First RAID Setup

2005-12-22 Thread Bill Davidsen
PATA drives on the same cable in master/slave, it's at least possible that this could happen with consumer grade hardware as well. Just a thought, dual failures are VERY unlikely unless one triggers the other in some way, like failing the bus or cabinet power supply. -- bill davidsen [EMAIL

Re: First RAID Setup

2005-12-22 Thread Bill Davidsen
and restores, as well as upgrades quite unpleasant. I guess you may have noticed that by now ;-) Good luck! -- 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: Adding Reed-Solomon Personality to MD, need help/advice

2006-01-08 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: Raid sync observations

2006-01-08 Thread Bill Davidsen
to make for better feel and write is cached somewhat. -- 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

Re: more info on the hang with 2.6.15-rc5

2006-01-08 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: mdadm-2.2 SEGFAULT: mdadm --assemble --scan

2006-01-08 Thread Bill Davidsen
was intended to be !(update which would explain the parens, but that seems wrong. If it actually works as intended with the patch, perhaps a comment and cleanup in 2.3? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe

Re: RAID 16?

2006-02-02 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 little computers since 1979

Re: RAID 16?

2006-02-02 Thread Bill Davidsen
external box. A work in progress, I realize. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with little 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

Re: with the latest mdadm

2006-02-07 Thread Bill Davidsen
is mdadm trying to use an illegal ioctl instead of checking the kernel version and disabling features which won't work? Users are trusting their data to this software, and try it and see if it works ioctls don't give me a warm fuzzy feeling about correct operation. -- bill davidsen [EMAIL PROTECTED

RAID 106 array

2006-02-08 Thread Bill Davidsen
parity blocks for every one data write, while the RAID-0 would be doing as little work as possible for writes and would therefore have more ability to handle reads quickly. Just a thought experiment at the moment. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things

Re: NVRAM support

2006-02-10 Thread Bill Davidsen
. Erik -- 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: 2.6.15: mdrun, udev -- who creates nodes?

2006-02-10 Thread Bill Davidsen
know someone who gave this a real life test, although I'd not say who. -- 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

shared spare

2006-02-10 Thread Bill Davidsen
One of the things I like about the IBM ServeRAID controller is spare drive shared between two RAID groups. First to fail gets it. For software RAID is this at all in the future? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since

Re: silent corruption with RAID1

2006-02-25 Thread Bill Davidsen
once a month, so I'm pretty sure there is no corruption happening. Cables are my favorite source of intermittent evil, memory problems are next, but that usually shows up everywhere if you look hard. Hope any of this is useful. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing

Re: block level vs. file level

2006-02-25 Thread Bill Davidsen
use fdisk usually, cfdisk when installing, both let me set size, fdisk let's me set starting track and even play with the partition table's idea of geometry. What kind of an option did you have in mind? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things

Re: 4 disks: RAID-6 or RAID-10 ..

2006-03-05 Thread Bill Davidsen
is the real question. It isn't too hard to make the drives more reliable than the case they're in, how many fans and power supplies can you survive losing? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from

Re: Does grub support sw raid1?

2006-03-22 Thread Bill Davidsen
suggestions on how to debug this? Kind regards, Herta Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm -- 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

Re: software raid to Hardware raid

2006-03-27 Thread Bill Davidsen
. Given the state of hardware raid when that kernel was new, and the state of the drivers, I would be very sure I had a GOOD reason to change anything. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list

Re: Partitioning md devices versus partitioining underlying devices

2006-04-06 Thread Bill Davidsen
can't say how well it works in practice, or which is better for you. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with little computers since 1979 - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: Softraid controllers and Linux

2006-04-16 Thread Bill Davidsen
will go to the first functional drive and boot. But if you get a CRC error, some BIOS will try another and some will just fail. Vendor dependent. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list

Re: RHEL3 kernel panic with md

2006-04-16 Thread Bill Davidsen
manually). I would worry about why the rescue mode didn't find your data, though. -- 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

Re: disks becoming slow but not explicitly failing anyone?

2006-05-04 Thread Bill Davidsen
will let you set the spindown time. I have all mine set that way for power and heat reasons, they tend to be in burst use. Dropped the CR temp by enough to notice, but I need some more local cooling for that room still. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting

Re: Two-disk RAID5?

2006-05-04 Thread Bill Davidsen
no corresponding thing in RAID5, which has one copy of the data, plus parity. There is no special case, it just doesn't work that way. Set N2 and report back. Sorry, I couldn't find a diplomatic way to say you're completely wrong. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting

Re: Two-disk RAID5?

2006-05-04 Thread Bill Davidsen
, the mke2fs seems to work, the f/s is there. Please verify, this system is a bit (okay a bunch) hacked. -- 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

Re: 4 disks in raid 5: 33MB/s read performance?

2006-05-24 Thread Bill Davidsen
it is, but I can't see why not. There was a problem with data going through stripe cache when it didn't need to, but I thought that was fixed. Neil? Am I an optimist? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: RAID5 kicks non-fresh drives

2006-05-26 Thread Bill Davidsen
as it is written where logwatch will see it, not recognize it, and report it... People who don't read their logwatch reports get no sympathy from me. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list: send

Re: Can't get drives containing spare devices to spindown

2006-05-30 Thread Bill Davidsen
--remove /dev/hd[eg]1) actually solves this, but I have no intention actually removing those devices. How can I make sure that I'm actually able to spin down those two spare drives? -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers

Re: problems with raid=noautodetect

2006-05-30 Thread Bill Davidsen
file Not sure I'm so keen on that, at least not in the near term. Let's not start warning and depreciating powerful features because they can be misused... If I wanted someone to make decisions for me I would be using this software at all. -- bill davidsen [EMAIL PROTECTED] CTO TMR

Re: problems with raid=noautodetect

2006-05-31 Thread Bill Davidsen
Luca Berra wrote: On Tue, May 30, 2006 at 01:10:24PM -0400, Bill Davidsen wrote: 2) deprecate the DEVICE keyword issuing a warning when it is found in the configuration file Not sure I'm so keen on that, at least not in the near term. Let's not start warning and depreciating powerful

RAID5E

2006-05-31 Thread Bill Davidsen
spare will avoid a bottleneck on a single drive. Is there any plan to add this capability? -- 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

Re: which CPU for XOR?

2006-06-13 Thread Bill Davidsen
than cache) anyway. That's my take on 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

Re: to understand the logic of raid0_make_request

2006-06-13 Thread Bill Davidsen
*. And if you're looking for a bug it may not be, so this is not an idle complaint. Some of the kernel coders think if it was hard to write it should be hard to understand. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: ANNOUNCE: mdadm 2.5.1 - A tool for managing Soft RAID under Linux

2006-06-16 Thread Bill Davidsen
if there's some standard that allows that in C code now, but it doesn't work with all C compilers). Even if valid, having the declaration at the top of the block in which it's used makes the program more readable. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things

Re: Is shrinking raid5 possible?

2006-06-22 Thread Bill Davidsen
, leaving 128k, and phase of the moon if you decide to use it. Sorry, I think the current approach is baaad human interface. -- 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

Re: New FAQ entry? (was IBM xSeries stop responding during RAID1 reconstruction)

2006-06-22 Thread Bill Davidsen
/rebuild. -- 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: Ok to go ahead with this setup?

2006-06-22 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: Ok to go ahead with this setup?

2006-06-22 Thread Bill Davidsen
in RAID mode, for some reason: http://thread.gmane.org/gmane.linux.kernel.device-mapper.devel/1980/ Based on three trials in five years, I'm happy with WD and Seagate. WD didn't ask when I bought it, just the serial for manufacturing date. -- bill davidsen [EMAIL PROTECTED] CTO TMR

Re: Large single raid and XFS or two small ones and EXT3?

2006-06-23 Thread Bill Davidsen
problems, but which provide little to no protection against site disasters. -- 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: Large single raid and XFS or two small ones and EXT3?

2006-06-25 Thread Bill Davidsen
hours @ 56,684M/hour or 945M/min or 15.75M/sec Did you tune the extN filesystems to the stripe size of the raid? -- 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

Re: Large single raid and XFS or two small ones and EXT3?

2006-06-25 Thread Bill Davidsen
is disproportionally high. Using more drives is cost effective, but they are not good for long term off site storage, because they're large and fragile. No obvious solutions in that price and application range that I see. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting

Re: Large single raid and XFS or two small ones and EXT3?

2006-06-26 Thread Bill Davidsen
to significant, without quantifying. Note, next month I will set up either a 2x750 RAID-1 or 4x250 RAID-5 array, and if I got RAID-5 I will have the chance to run some metrics before putting the hardware into production service. I'll report on the -R option if I have any data. Bill Davidsen

Re: RAID5 degraded after mdadm -S, mdadm --assemble (everytime)

2006-06-26 Thread Bill Davidsen
think there was another device, failed or missing, which was device[3]? I just looked at a bunch of my arrays and found no similar examples. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list

Re: IBM xSeries stop responding during RAID1 reconstruction

2006-06-26 Thread Bill Davidsen
in kernel build or on the bloot parameters from grub/lilo. 2nd thought: set it to cfq by default, then at the END of rc.local, if there are no arrays rebuilding, change to something else if you like. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small

Re: I need a PCI V2.1 4 port SATA card

2006-06-29 Thread Bill Davidsen
on the block though, but never had any real issues with them. -- 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: Cutting power without breaking RAID

2006-06-29 Thread Bill Davidsen
whines. -- 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: Random Seek on Array as slow as on single disk

2006-07-17 Thread Bill Davidsen
/majordomo-info.html - 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] CTO TMR Associates, Inc Doing interesting things with small

Re: Hardware assisted parity computation - is it now worth it?

2006-07-17 Thread Bill Davidsen
tunable than a CPU based solution. Except in the case above where there is very little CPU available, I don't see much hope for a cost (money and complexity) effective non-CPU solution. Obviously my opinion only. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things

Re: Array will not assemble

2006-07-17 Thread Bill Davidsen
changes are not provided, because ver versions mean new issues. Stability has its price. -- 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

Re: second controller: what will my discs be called, and does it matter?

2006-07-17 Thread Bill Davidsen
recently ran into trouble because of such an issue.) You shouldn't lose data unless you panic at the first learning experience and do something without thinking of the results. I would convert to UUID first, obviously. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting

Re: issue with internal bitmaps

2006-07-17 Thread Bill Davidsen
the invariant array name when mdadm wants them, instead of having a user or script check the array to get the components? Between udev and dynamic reconfiguration when component names have become less and less relevant, perhaps they can be less used in the future. -- bill davidsen [EMAIL PROTECTED

Re: [PATCH] enable auto=yes by default when using udev

2006-07-17 Thread Bill Davidsen
. Because /dev and /tmp are well known special cases, I would default auto for them. In other cases explicit behavior could be specified. Feel free to point out something bad which occurs by using this default behavior. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing

Re: Test feedback 2.6.17.4+libata-tj-stable (EH, hotplug)

2006-07-17 Thread Bill Davidsen
data :) And thank you for testing! -- 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

Re: which disk the the one that data is on?

2006-07-18 Thread Bill Davidsen
. If it was from unclean shutdown you really should look into a bitmap if you don't have one. -- 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

Re: issue with internal bitmaps

2006-07-18 Thread Bill Davidsen
Bill Davidsen wrote: Neil Brown wrote: On Thursday July 6, [EMAIL PROTECTED] wrote: hello, i just realized that internal bitmaps do not seem to work anymore. I cannot imagine why. Nothing you have listed show anything wrong with md... Maybe you were expecting mdadm -X /dev/md100

Re: [PATCH 005 of 9] md: Replace magic numbers in sb_dirty with well defined bit flags

2006-08-01 Thread Bill Davidsen
to misunderstanding load. -- 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: Interesting RAID checking observations - I'm getting it too

2006-09-04 Thread Bill Davidsen
does during the check. Let me know if you want any more or other sar data. [ data dropped, not relevant to my suggestion ] -- 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: Feature Request/Suggestion - Drive Linking

2006-09-04 Thread Bill Davidsen
writing new. In fact, several suggested recovery schemes involve stopping the RAID5, replacing the failing drive with a created RAID1, etc. So the method is valid, it would just be nice to have it happen without human intervention. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc

Re: PROBLEM: system crash on AMD64 with 2.6.17.11 while accessing 3TB Software-RAID5

2006-09-04 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: Raid5 reads and cpu

2006-09-04 Thread Bill Davidsen
read on raid5? I feel like if there was vm overhead getting the data into userland, the slowdown would be present in raid0 as well. I assume parity calculations aren't done on a read of the array, which leaves me at my question. What are you stripe and cache sizes? -- bill davidsen [EMAIL

Re: Interesting RAID checking observations

2006-09-04 Thread Bill Davidsen
but the characters don't get echoed. The type part is in the kernel, but the display involves X unless you run a direct console. -- 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

Re: Linux: Why software RAID?

2006-09-04 Thread Bill Davidsen
the controller to think the 2nd drive failed was okay, and then it would recover. I'm told this happens with other hardware, I just haven't personally seen it. From that standpoint, the SATA on the MB look pretty good! -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting

Re: RAID over Firewire

2006-09-04 Thread Bill Davidsen
incremental dump program to DVD or similar. -- 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

Re: RAID5 producing fake partition table on single drive

2006-09-04 Thread Bill Davidsen
a boot option like nopart=sda,sdb or similar would be in order? -- 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: Can you IMAGE Mirrored OS Drives?

2006-09-04 Thread Bill Davidsen
one drive, drop it in another machine, and let the script run on the other machine to finish the job. I have no idea how many of these you are doing, but automation is nice to avoid finger checks. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small

Re: 3ware glitches cause softraid rebuilds

2006-09-04 Thread Bill Davidsen
)); + msleep(1); if (time_after(jiffies, before + HZ * 30)) goto out; } -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from this list

Re: Linux: Why software RAID?

2006-09-04 Thread Bill Davidsen
. For raid 0 there is no advantage. If your raid is entirely on PCI plug in cards and you are doing RAID1 there is a speed up using hardware assisted raid because of the PCI bus contention. I would expect to see this with RAID5 as well, for the same reason... -- bill davidsen [EMAIL

Re: RAID over Firewire

2006-09-05 Thread Bill Davidsen
Richard Scobie wrote: Bill Davidsen wrote: It should work, but I don't like it... it leaves you with a lot of exposure between backups. Unless your data change a lot, you might consider a good incremental dump program to DVD or similar. Thanks. I have abandoned this option for various

Re: raidhotadd works, mdadm --add doesn't

2006-09-14 Thread Bill Davidsen
-9148 http://eatworms.swmed.edu/~leon/ - 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] CTO TMR Associates, Inc

Re: PROBLEM: system crash on AMD64 with 2.6.17.11 while accessing 3TB Software-RAID5

2006-09-14 Thread Bill Davidsen
. Thanks again for your time, Thanks for letting us know what it was. Even if it was not the first thing we suggested. ;-) -- 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: RAID5 producing fake partition table on single drive

2006-09-14 Thread Bill Davidsen
Lem wrote: On Mon, 2006-09-04 at 13:55 -0400, Bill Davidsen wrote: May I belatedly say that this is sort-of a kernel issue, since /proc/partitions reflects invalid data? Perhaps a boot option like nopart=sda,sdb or similar would be in order? Is this an argument to be passed

Re: RAID5 fill up?

2006-09-16 Thread Bill Davidsen
that it just meant someone was too lazy to type 'maximum' at the time. -- 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: proactive-raid-disk-replacement

2006-09-16 Thread Bill Davidsen
on the new drive. But wait, there's more! Assume that I want to upgrade from a set of 250GB drives to 400GB drives. Using this feature I could replace a drive at a time, then --grow the array. The process for doing that is complex currently, and many manual steps invite errors. -- bill davidsen

Re: Correct way to create multiple RAID volumes with hot-spare?

2006-09-16 Thread Bill Davidsen
you want it earlier than that, unless you want to do the whole mounting process by hand. It's distribution dependent, but doing it early allows the array to be handled like any other block device. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small

Re: ATA cables and drives

2006-09-16 Thread Bill Davidsen
which lock the entire disk in place? Thanks for reading, and thanks in advance for answers (if any) :-). - 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

Re: Slackware and RAID

2006-09-16 Thread Bill Davidsen
of what you need, see the thread(s) here about monitoring. mdadm doesn't need a lot of direction... -- 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: Slackware and RAID

2006-09-18 Thread Bill Davidsen
Dexter Filmore wrote: Am Samstag, 16. September 2006 19:26 schrieb Bill Davidsen: Dexter Filmore wrote: Is anyone here who runs a soft raid on Slackware? Out of the box there are no raid scripts, the ones I made myself seem a little rawish, barely more than mdadm --assemble/--stop

Re: proactive-raid-disk-replacement

2006-09-21 Thread Bill Davidsen
Guy wrote: } -Original Message- } From: [EMAIL PROTECTED] [mailto:linux-raid- } [EMAIL PROTECTED] On Behalf Of Bill Davidsen } Sent: Saturday, September 16, 2006 10:29 AM } To: Tuomas Leikola } Cc: Bodo Thiesen; Linux RAID } Subject: Re: proactive-raid-disk-replacement } } Tuomas

Re: new features time-line

2006-10-17 Thread Bill Davidsen
down, and anything which offers performance benefits for smaller arrays would be useful. -- 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

Re: why partition arrays?

2006-10-24 Thread Bill Davidsen
) there is no bug-free software, therefore the use of LVM on top of RAID will be less reliable than a RAID-only solution. I can't quantify that, the net effect may be too small to measure. However, the cost and chance of a finger check from (a) and (b) are significant. -- bill davidsen [EMAIL PROTECTED

Re: Bug with RAID1 hot spares?

2006-10-24 Thread Bill Davidsen
, but for reads having another copy of the data to read (usually) helps the performance by reducing wait for read occurences. -- 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

Re: future hardware

2006-10-27 Thread Bill Davidsen
and use existing hardware. Idle curiousity: what kind of case are you using for the drives? I will need to spec a machine with eight drives in the December-January timeframe. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979

Re: Question of PCI bandwidth affect on SW RAID arrays.

2006-10-27 Thread Bill Davidsen
have a server board it may have multiple PCI busses, and therefore a higher max bandwidth with multiple cards. I would still expect PCI-e to be faster. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc Doing interesting things with small computers since 1979 - To unsubscribe from

Re: New features?

2006-10-31 Thread Bill Davidsen
priority). Single to RAID-N is possible, but involves a good bit of magic with leaving room for superblocks, etc. 4. Uneven disk sizes, eg adding a 400GB disk to a 2x200GB mirror to create a 400GB mirror. Together with 2 and 3, allows me to continuously expand a disk array. ??? -- bill

Re: new array not starting

2006-11-08 Thread Bill Davidsen
being used on whole drives, and perhaps that makes the whole device get ignored, or perhaps it never worked. Perhaps there's an interaction with LVM, the more complex you make your setup the greater the chance for learning experiences. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc

Re: Is my RAID broken?

2006-11-08 Thread Bill Davidsen
on the RAID options used. -- 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 array showing as degraded after motherboard replacement

2006-11-08 Thread Bill Davidsen
or force the driver to consider this a RAID0 single disk setup? I don't know what RAID0 on one drive means, but I suspect that having the controller in the mode you want is desirable. That might have been changed in the hardware failure. -- bill davidsen [EMAIL PROTECTED] CTO TMR Associates, Inc

Recovering from default FC6 install

2006-11-11 Thread Bill Davidsen
in them asfter several hours of feeding with GigE, so I can't readily back up and recreate by hand. Suggestions? -- 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

Re: Recovering from default FC6 install

2006-11-14 Thread Bill Davidsen
Doug Ledford wrote: On Sun, 2006-11-12 at 01:00 -0500, Bill Davidsen wrote: I tried something new on a test system, using the install partitioning tools to partition the disk. I had three drives and went with RAID-1 for boot, and RAID-5+LVM for the rest. After the install was complete I

Re: md manpage of mdadm 2.5.6

2006-11-19 Thread Bill Davidsen
be changed to decrease or time to speed. Probably better to say unclean than unclear shutdown 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

Re: mdadm RAID5 Grow

2006-11-28 Thread Bill Davidsen
), in practice a lot of software depends on them being present and in the usual place. -- 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

Odd (slow) RAID performance

2006-11-30 Thread Bill Davidsen
://www.tmr.com/~davidsen/RAID_speed.html -- Bill Davidsen [EMAIL PROTECTED] We have more to fear from the bungling of the incompetent than from the machinations of the wicked. - from Slashdot - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED

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