Arch Linux

dezza

Member

From: Denmark

Registered: 2007-04-05

Posts: 126

Sudden read-only on RAID array.

I don't know if this was caused by an update but suddently my /raid is mounted read-only. It doesn't happen right after the mount but suddently after 1 day of uptime or a few hours and the /raid partition is locked again.

[dezza@dezza ~]$ cd /raid/
[dezza@dezza raid]$ touch me
touch: cannot touch `me': Read-only file system

[dezza@dezza raid]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1              34G   13G   22G  38% /
none                 1013M     0 1013M   0% /dev/shm
/dev/sda3              46M   12M   32M  27% /boot
/dev/md0              466G  364G  103G  79% /raid

[dezza@dezza raid]$ cat /etc/fstab
# /etc/fstab: static file system information

# <file system>        <dir>                            <type>          <options
>                       <dump> <pass>
none                    /dev/pts                        devpts          defaults
0       0
none                    /dev/shm                        tmpfs           defaults
0       0

# Optical drive, CD/DVD
/dev/sr0                /media                          iso9660,udf     ro,user,
noauto,unhide                                                   0       0

# Root, swap, boot
/dev/disk/by-label/root         /                       reiserfs        defaults
0       1
/dev/disk/by-label/swap         swap                    swap            defaults
0       0
/dev/disk/by-label/boot         /boot                   ext2            defaults
0       1

# RAiD BACKUP (2x 500GB Western Digital 7200RPM) 
/dev/md0                /raid                           reiserfs        defaults
,sync,user                                      0       0
#

# External 1TB
/dev/disk/by-label/external             /mnt/1tb                ntfs-3g        u
ser,sync,exec,uid=1000,gid=1000,locale=en_DK.utf8,force,noauto          0      0

# VirtualBox
none /proc/bus/usb usbfs auto,busgid=108,busmode=0775,devgid=108,devmode=0664,lo
cale=en_DK.utf8 0 0
[dezza@dezza raid]$

Last edited by dezza (2009-08-24 14:42:13)

donpicoro

Member

Registered: 2009-04-10

Posts: 42

Re: Sudden read-only on RAID array.

I had the same problem with a hardware RAID array... I was installing Arch in an previously Redhat server.
The error I got just just before the read-only thing was related to the filesystem... (Arch was in reiserfs and /home in Redhat is ext3)

That read-only thing only happened when I was performing heavy load on the raid by rsyncing almost 300GB from RH to the new arch (No error while installing and configure a very complete system).
I though maybe it was that reiserfs wasn't good enough and I tried with no luck using jfs (the same I succesfully use in LVM in my laptop).

At the end I decided to get rid of the filesystem difference and It worked using ext3.

It worked perfectly for almost a month until last week that we had a crash copying 180GB from an USB external drive. We tried again and it worked with no problems. So in conclusion:

I used ext3 successfully but I have one crashed (after the read-only thing the system becomes useless) documented.

I know this is not an answer but I hope this help you or maybe help someone to give us a point.

P.S: The raid arrays are in the same computer (PERC6 I think) using the aacraid driver. One is raid 5 (RH) and the other one is RAID 0 (Arch),

dezza

Member

From: Denmark

Registered: 2007-04-05

Posts: 126

Re: Sudden read-only on RAID array.

Is this a problem caused by software RAID in Linux or ReiserFS can anyone confirm this?

I have a problem with backup since I'll have to re-order my disks, but I have 2TB not even unpackaged, 1TB in external (filled), 2x500GB RAID1 but I should lean towards a more decent filesystem. I did know reiserfs was not the best but alot happens with fs' now that it's hard to make a decision with something you doesn't know.

No one knows how to prevent/fix this?

Last edited by dezza (2009-08-24 22:47:56)

dezza

Member

From: Denmark

Registered: 2007-04-05

Posts: 126

Re: Sudden read-only on RAID array.

REISERFS error (device md0): vs-4080 _reiserfs_free_block: block 77178145: bit already cleared
REISERFS (device md0): Remounting filesystem read-only
REISERFS error (device md0): vs-4080 _reiserfs_free_block: block 77178139: bit already cleared
REISERFS error (device md0): vs-4080 _reiserfs_free_block: block 77178135: bit already cleared
REISERFS error (device md0): vs-4080 _reiserfs_free_block: block 77178125: bit already cleared
REISERFS error (device md0): vs-4080 _reiserfs_free_block: block 77178119: bit already cleared
REISERFS error (device md0): vs-4080 _reiserfs_free_block: block 77178115: bit already cleared

I found something on dmesg that might enlighten this issue.

Doing reiserfsck and reiserfsck --fix-fixable.

AKA. Never Reiserfs again ..

Last edited by dezza (2010-02-25 02:57:22)