Re: shared spare

ck through the man page for information on spare-groups. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit

Re: RAID 16?

anything, despite it being a horribly bad idea! Don't try that at home... -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with

Re: Selective spin-up

I do not know how commonly implemented the feature is in devices that claim to support SATA-II specifications. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematician

Re: [PATCH 000 of 5] md: Introduction

e toolkit issue alone makes it worth keeping both code paths. md does 90% of what I need, so why should I spend the time to learn a new system that doesn't offer any advantages? [1] I'm intentionally neglecting the 4k stack issue -- Ross Vandegrift [EMAIL PROTECTED] "The good C

Re: [PATCH 000 of 5] md: Introduction

I accidently ruined my RAID array!". Neil almost always responds "Well, don't do that! But since you did, this might help...". -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The dan

Re: md faster than h/w?

hich, the PCIX will be hard to fill up. I've seen 32-bit, 33MHz 3Ware cards hold 80MB/sec without breaking a sweat. If there's a PCI-X or PCI Express version of the TX4, then just pretend I didn't post this ::-) -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should

Re: md faster than h/w?

than raid0? I don't see why > that would be... Though reading is the same in theory, I like RAID1 better ::-). If I were you, I'd test all applicable configurations. But of course we haven't even gotten into write speed... -- Ross Vandegrift [EMAIL PROTECTED] "The good

Re: md faster than h/w?

rocs, SCSI, and a better RAID card. However, I'd also try RAID1 if you're mostly interested in read speed. Remember that RAID1 lets you balance reads across disks, whereas RAID0 will require each disk in the array to retrieve the data. -- Ross Vandegrift [EMAIL PROTECTED] "The good C

Re:

be a really low probability! It will be far, far more common for operator error to break a RAID than for both devices to honestly fail. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that th

Re: your mail

Finally, if you use mdadm's --uuid option to assemble your array after creating it, it should just find the USB disks, regardless of where they came up. That way, you only need to worry about what device node they are using when you first create the array. Good luck! -- Ross Van

Re: disk light remains on

ot;? If this is an initial creation and your disks are large, it's likely just the initial array build. If your array is synced and your disks are still being accessed, are you sure that there's no processes using your disk? Sorry - silly things first! -- Ross Vandegrift [EMAIL PROTECTED

Re: SATA performace

ative mode". I don't know what the difference is, but I've seen Legacy mode boxes crawl... -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have mad

Re: RAID-5 using CLOOP devices

If they are assembled via devices, you will probably have to change the command line to assemble them. The hitches with software devices are only in making sure that the devices are active before assembling the array. So for cloop, you'll just need to start the devs before assembling your md.

Re: raid1: All my data completely vanished into the void

ent devices > /dev/md0 /dev/md1 /dev/md2 before doing that. When you shutdown cleanly, your system's scripts almost certainly did that for you! ::-) -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The d

Re: RAID-5 using CLOOP devices

ssibly not work? Maybe I don't understand the situation... -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken

Re: Linux RAID Enterprise-Level Capabilities and If It Supports Raid Level Migration and Online Capacity Expansion

ation, and how you're using it. In general, RAID 0+1 has better seek properties because reads can be done independantly from many disks. RAID5 is always going to be slow because n-1 disks need to all simultaneously read their stripe, and this can cause spindle contention. Of course, you lo

Re: RAID design decisions

If you've never seen it, check Documentation/md.txt for syntax and details. Debian's mkinitrd scripts do a pretty good job of building initrd's for md, though I can't vouch for their LVM support. My workstation runs Slackware, and I'm far too lazy to build my own init

Re: raid1 mysteriously switching to read-only

straction between your applications and the actual devices you are storing data on. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant wit

Re: RAID5 problem

s what runs in my bashrc: # Scream and cry a lot if the RAID looks weird! if /bin/grep _ /proc/mdstat; then for ((scream = 0; scream < 5; scream ++)); do echo -e "POSSIBLE PROBLEM WITH RAID" sleep 0.1 done cat /proc/mdstat fi

Re: RAID5 problem

On Mon, Dec 05, 2005 at 01:44:17PM +1100, Neil Brown wrote: > The text-messaging I don't like. That is what the --program option if > for. If you don't want the very-basic email message, then write > yourself a little script to do exactly what you want. Heh - had I known about that feature it wo

Re: RAID5 problem

graded arrays in /proc/mdstat. If it finds them it prints obnoxious messages, beeps, and dumps out mdstat for instant examination. Neil - did you get a chance to look at the syslog and text messaging patches I posted? -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should b

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

es. In your case, it means using mdadm to start the RAID devices. http://www.faqs.org/docs/evms/x3834.html that link is pretty helpful information on how to build an initrd manually. It's aimed at people using EVMS, but the general lessons it teaches about building the image are gene

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

if you have the drivers built into the kernel. But I do understand that it might not be practical for you to build your own kernel. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists t

Re: mdadm 2.1: command line option parsing bug?

s especially. It's current form is awesome for that. Throw the right args together and you can do anything. As soon as it's interative, we might as well use a mouse... ::-P -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those

Re: Autostart RAID1 on boot

pport that if you get things setup properly. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to

Re: raid5 recovery fails

or the ones that I randomly chose ::-) -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine m

[PATCH] minor bugfix in expected_spares logic

Hi Neil, After implementing syslogging, I noticed that mdadm was logging INFO level messages that my arrays were missing spares. Thing is, none of my arrays have spares. This patch adds a check for expected_spares != UnSet, so if "spares=0" is missing from an array, it is not logged.

[PATCH] syslog support for monitor mode

Hi Neil, While adding the text message mode, I saw a FIXME asking for syslog support in monitor mode. This patch adds exactly that. -- Ross Vandegrift [EMAIL PROTECTED] "The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists

[PATCH] add text message mode for terse reports

Hi Neil, I recently setup mdadm to monitor my md RAIDs and text message my cellphone in the event of a device failure. I found that the reports were too verbose to easily read on my phone. --textmsg, -T makes the emails mdadm generates shorter to be read on mobile devices. -- Ross Vandegrift

Re: raid 5: switching cache buffer size, 4096 --> 1024. More info.

x27;re not trying to use the gcc snapshot that RedHat shipped. The bad version was 2.96.x - if 'gcc -v' claims that as it's version you need to build with a different gcc, installed as 'kgcc'. Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]

Re: raid 5: switching cache buffer size, 4096 --> 1024. More info.

le remove_hash'ing before it gets to the printk that would announce this new size. No, I don't know why your setup would break, but might it be instructive for debugging purposes to insert some printk's around line 286 in raid5.c? Perhaps if you knew where the kernel was locking t

Autostart related problems

enough that I can't kill it. The filesystem doesn't mount and I have to reboot. I tried forcing some sleep before the raidstart command, thinking the mount and the raidstart might be racing, but it didn't help at all. Does this look like a problem in RAID, modutils, or my se

Re: Kernel driving > 4 IDE drives

e this takes lots of physical planning in addition to logical planning. But if you're up to the task at hand, I can personally testify that such a setup rocks ::-). Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] On Wed, May 30, 2001 at 07:12:58AM +, Edouard Soriano wrote: > He

Re: Maxtor 80gb slow on asus p2b-d ? (going to use it in raid5 config)

If only!!! UDMA66 means that the bus is capable of *bursting* data up to 66MB/sec. That's not a sustained speed. Your numbers are right on target for sustained transfers, from what I have seen. Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] - To unsubscribe from this list: send

Re: Maxtor 80gb slow on asus p2b-d ? (going to use it in raid5 config)

astest IDE drive ever made). That's an expensive proposition if you've already bought 6*Maxtor 80's though... Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]

Re: Best way to test a new RAID configuration

It's pretty killer. Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] #!/bin/bash - # -*- Shell-script -*- # # Copyright (C) 1999 Bibliotech Ltd., 631-633 Fulham Rd., London SW6 5UQ. # # $Id: stress.sh,v 1.2 1999/02/10 10:58:04 rich Exp $ # # Change log: # # $Log: stress.sh,v $ # Revision 1

Re: RAID1 Read performance

ct to individual drives in the array? Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]

RAID1 Read performance

els for a while, and have noticed that access to the array takes a bit longer. 'hdparm -t /dev/md0' now tops out at 17MB/sec. Is this to be expected in the transition to 2.4, or did I mess something up? Thanks, Ross Vandegrift [EMAIL PROTECTED] [EMAIL PROTECTED] -

raid1: outof memory, retrying...

on Thu Dec 21 12:56:03 2000 Thanks for any tips! Ross Vandegrift Seitz Technical Products Inc [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED]