dmraid not recognizing raid arrays.

tehfishman · 2008-11-10 21:18:12

Ran pacman -Syu, and part of the update was to the new dmraid. After rebooting, my /dev/mapper directory only has "control" in it. I looked through these two forum posts, but I still don't have any idea where to even begin to try and fix this.

http://bbs.archlinux.org/viewtopic.php?id=57579
http://bbs.archlinux.org/viewtopic.php?id=56641

The output from dmraid -ay:

ERROR: isw: Could not find disk /dev/sdc in the metadata
ERROR: isw: Could not find disk /dev/sdb in the metadata
no raid disks

The raid array is a 500GB array that is only used for storage, so I can still boot fine. dm_mod is loaded. Everything still seems to work, with the exception of my raid array. Any kind of help would be appreciated.

lilsirecho · 2008-11-10 22:02:38

Perhaps the ID for the devices has changed?

tehfishman · 2008-11-10 22:07:07

lilsirecho wrote:

Perhaps the ID for the devices has changed?

But then shouldn't the device still be in /dev/mapper by some name, even if it is a different one?

.:B:. · 2008-11-10 23:44:20

What does

cat /proc/mdstat

return?

tehfishman · 2008-11-10 23:54:42

B wrote:

What does
cat /proc/mdstat
return?

[user@computar ~]$ cat /proc/mdstat
Personalities : 
unused devices: <none>

Last edited by tehfishman (2008-11-10 23:55:19)

.:B:. · 2008-11-11 00:10:57

Sorry... I was thinking about mdadm, but you're actually using dmraid...

Ekimino · 2008-11-11 00:42:22

Try reading the Outputs from Pacman. There was a change in the way devices are named.

>>> IMPORTANT DMRAID UPGRADE NOTICE
>>> -------------------------------
>>> Version 1.0.15rc introduce a new name scheme:
>>> You need to add an additional 'p' in front of your number.
>>> e.g. <yourname><number> --> <yourname>p<number>
>>>      firsthd1           --> firsthdp1
>>> Please change your bootloader and fstab accordingly.
>>>

This was the output of dmraid. So you should just change in fstab and in Grub your device name from /dev/sda1 to /dev/sdap1

Saludos

tehfishman · 2008-11-11 01:40:28

Ekmino, that's all well and good and I am aware of the change in naming scheme (I said that i read those two forum posts, one was about the change in naming). The problem is that the devices aren't being recognized (did you read my post?). Maybe the devices are being recognized and I'm being silly somehow and not seeing that they are? If so could you point it out to me?

Ekimino · 2008-11-11 01:47:36

I read your post, but took the chance that the name scheme was the problem, and didn't enter those threads.(I'm sorry for being rude). Try running cfdisk <device>, just to check if it's there. if it is paste the output of df -h.

tehfishman · 2008-11-11 02:23:28

'sokay

output from cfdisk on /dev/sdb

FATAL ERROR: Bad primary partition 0: Partition ends after end-of-disk
                          Press any key to exit cfdisk

output from cfdisk on /dev/sdc

Unknown partition table type
Do you wish to start with a zero table [y/N] ?

Answered that last one with N.

df -h gives

Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              94G   24G   65G  27% /
none                  2.0G     0  2.0G   0% /dev/shm
/dev/sda1             101G  7.4G   94G   8% /mnt/xp
/dev/sda2              99G   79G   21G  80% /mnt/vista

tehfishman · 2008-11-11 02:26:05

Just to clear up any possible confusion, I should probably add that /dev/sda is my primary drive which holds my operating systems. /dev/sdb and /dev/sdc are the two drives that make up a raid 0.

Ekimino · 2008-11-11 02:35:57

Ok, I'm not liking the research I'm reading, I think you're disks are screwed. Lots of people say they have fixed the same problem with Gparted. http://gparted.sourceforge.net

lilsirecho · 2008-11-11 02:39:07

Perhaps gparted will give some help?

Ekimino · 2008-11-11 02:41:28

I have actually little knowledge about hard disks, but just try to boot that livecd up and check what it has to say for each disk, maybe it will auto-guide-you.

tehfishman · 2008-11-11 02:42:22

Well, I just restarted and am now looking at my raid disk in Vista. Works fine from here. I can go try it from XP if necessary as well.

Ekimino · 2008-11-11 02:43:52

Can you acces the files? and everything works as it should be?

tehfishman · 2008-11-11 02:45:39

Reading and writing works flawlessly. I just started up chkdsk.

Ekimino · 2008-11-11 02:47:15

Humm, do you know if dmraid, has a config file where it sets the disk cilinders... adn etc... maybe that's screwed up. I doubt it though, a file just doesn't change for itself. Now that I'm thinking, the new version came with a new config file and you used it?

tehfishman · 2008-11-11 02:50:40

I actually have no idea if dmraid uses any config files. When I first set up the raid array to work in linux, i just loaded the modules and ran dmraid -ay. That created /dev/mapper/ohgodsomehugeobnoxiousname. I could mount the device that dmraid created without editing any config files other than having the module get loaded from rc.conf.

Ekimino · 2008-11-11 02:53:33

I ran out of ideas, I just hope somebody who uses dmraid is paying attention. Sorry i couldn't be much help. Still i would try gparted, just to check if it works under another raid proof linux

tehfishman · 2008-11-11 02:55:33

Eh, thanks for trying. I'm going to let chkdsk finish up, back up what's on the disk and then maybe start poking around with gparted. Hopefully that will yeild something helpful.

extcake · 2008-11-11 09:36:27

I have the same problem.
Unfortunetly my root partition is on fakeraid, so i can't boot.
Output from dmraid -ay:

ERROR: isw: Could not find disk /dev/sdb in the metadata
ERROR: isw: Could not find disk /dev/sdc in the metadata
ERROR: isw: Could not find disk /dev/sdd in the metadata
ERROR: isw: Could not find disk /dev/sda in the metadata
no raid disks

There are no devices in /dev/mapper.
Disk and raid are fine, becouse Vista works as usual.
I'm downloading usb boot image so i can revert kernel to previous one.

Ekimino wrote:

This was the output of dmraid. So you should just change in fstab and in Grub your device name from /dev/sda1 to /dev/sdap1

I upgraded dmraid before kernel upgrade, and i saw this notice. I update acording files, and system didn't boot, becouse naming schema didn't change! Revert back to old ones, and arch was runining fine until evening upgrade(including kernel update).

edit
usb pen with arch image freez my pc on bios screen

Last edited by extcake (2008-11-11 10:59:46)

zaggynl · 2008-11-11 16:30:11

Same issue here, updated last night, booted now:

[zaggynl@6750 ~]$ sudo dmraid -ay
ERROR: isw: Could not find disk /dev/sdc in the metadata
ERROR: isw: Could not find disk /dev/sdb in the metadata
no raid disks

baw

lilsirecho · 2008-11-11 16:33:21

What does gparted show for those drives? Are they recognized as sdb1 or sdbp1? Are they missing?

EDIT: What is shown in dmesg?

Last edited by lilsirecho (2008-11-11 17:03:14)

tehfishman · 2008-11-11 19:56:58

lilsirecho wrote:

What does gparted show for those drives? Are they recognized as sdb1 or sdbp1? Are they missing?
EDIT: What is shown in dmesg?

gparted shows three hard disks on my system; sda, sdb, and sdc. No sd*p1. sdb and sdc are the two disks that make up the raid array.

dmesg shows a huge amount of errors about sdb and referencing blocks outside of the range of the disk. It did this before the upgrade without any problems, and I assume that it has to do with the fact that the disk is part of a raid array.

attempt to access beyond end of device
sdb: rw=0, want=976751808, limit=488397168
__ratelimit: 155 callbacks suppressed
Buffer I/O error on device sdb1, logical block 976751744
attempt to access beyond end of device
sdb: rw=0, want=976751809, limit=488397168

EDIT: the above error is repeated about 50 times, with a different number for want each time

Last edited by tehfishman (2008-11-11 19:57:44)

Arch Linux

#1 2008-11-10 21:18:12

dmraid not recognizing raid arrays.

#2 2008-11-10 22:02:38

Re: dmraid not recognizing raid arrays.

#3 2008-11-10 22:07:07

Re: dmraid not recognizing raid arrays.

#4 2008-11-10 23:44:20

Re: dmraid not recognizing raid arrays.

#5 2008-11-10 23:54:42

Re: dmraid not recognizing raid arrays.

#6 2008-11-11 00:10:57

Re: dmraid not recognizing raid arrays.

#7 2008-11-11 00:42:22

Re: dmraid not recognizing raid arrays.

#8 2008-11-11 01:40:28

Re: dmraid not recognizing raid arrays.

#9 2008-11-11 01:47:36

Re: dmraid not recognizing raid arrays.

#10 2008-11-11 02:23:28

Re: dmraid not recognizing raid arrays.

#11 2008-11-11 02:26:05

Re: dmraid not recognizing raid arrays.

#12 2008-11-11 02:35:57

Re: dmraid not recognizing raid arrays.

#13 2008-11-11 02:39:07

Re: dmraid not recognizing raid arrays.

#14 2008-11-11 02:41:28

Re: dmraid not recognizing raid arrays.

#15 2008-11-11 02:42:22

Re: dmraid not recognizing raid arrays.

#16 2008-11-11 02:43:52

Re: dmraid not recognizing raid arrays.

#17 2008-11-11 02:45:39

Re: dmraid not recognizing raid arrays.

#18 2008-11-11 02:47:15

Re: dmraid not recognizing raid arrays.

#19 2008-11-11 02:50:40

Re: dmraid not recognizing raid arrays.

#20 2008-11-11 02:53:33

Re: dmraid not recognizing raid arrays.

#21 2008-11-11 02:55:33

Re: dmraid not recognizing raid arrays.

#22 2008-11-11 09:36:27

Re: dmraid not recognizing raid arrays.

#23 2008-11-11 16:30:11

Re: dmraid not recognizing raid arrays.

#24 2008-11-11 16:33:21

Re: dmraid not recognizing raid arrays.

#25 2008-11-11 19:56:58

Re: dmraid not recognizing raid arrays.

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