[rhelv6-list] Best options to mount ext4 over iSCSI?

[Gianluca Cecchi]

Hello,
I have a RH EL 5.9 server that is configured as iSCSI target software
(scsi-target-utils provided by OS... a bit outdated vs what in RH EL
6)
It exports an LVM (based on a RAID 5 hw on a Dell system) of about 5Tb
to a RH EL 6.4 system that has formatted and mounts an ext4 fs.

What are the best option to mount this kind of filesystem at iSCSI
initiator side?

So the question regards barriers, acl and other options.
Basically the fs is used to save Oracle backups through rman on disk.

At this moment /proc/mounts gives:

/dev/mapper/VG_I_BCKDB01-LV_I_BCKDB01 /datasave/database ext4
rw,relatime,user_xattr,acl,barrier=1,data=ordered 0 0

Yesterday I experienced a reboot and these messages during latest days:

Sep 22 16:20:17 myserver kernel: EXT4-fs (dm-6): error count: 5
Sep 22 16:20:17 myserver kernel: EXT4-fs (dm-6): initial error at
1378602406: ext4_journal_start_sb:296
Sep 22 16:20:17 myserver kernel: EXT4-fs (dm-6): last error at
1378640505: ext4_put_super:772
Sep 23 16:22:05 myserver kernel: EXT4-fs (dm-6): error count: 5
Sep 23 16:22:05 myserver kernel: EXT4-fs (dm-6): initial error at
1378602406: ext4_journal_start_sb:296
Sep 23 16:22:05 myserver kernel: EXT4-fs (dm-6): last error at
1378640505: ext4_put_super:772
Sep 24 16:23:52 myserver kernel: EXT4-fs (dm-6): error count: 5
Sep 24 16:23:52 myserver kernel: EXT4-fs (dm-6): initial error at
1378602406: ext4_journal_start_sb:296
Sep 24 16:23:52 myserver kernel: EXT4-fs (dm-6): last error at
1378640505: ext4_put_super:772
Sep 25 16:25:40 myserver kernel: EXT4-fs (dm-6): error count: 5
Sep 25 16:25:40 myserver kernel: EXT4-fs (dm-6): initial error at
1378602406: ext4_journal_start_sb:296
Sep 25 16:25:40 myserver kernel: EXT4-fs (dm-6): last error at
1378640505: ext4_put_super:772
Sep 26 16:24:44 myserver init: tty (/dev/tty1) main process (3716)
killed by TERM signal
Sep 26 16:24:44 myserver init: tty (/dev/tty2) main process (3718)
killed by TERM signal
Sep 26 16:24:44 myserver init: tty (/dev/tty3) main process (3720)
killed by TERM signal
Sep 26 16:24:44 myserver init: tty (/dev/tty4) main process (3722)
killed by TERM signal
Sep 26 16:24:44 myserver init: tty (/dev/tty5) main process (3724)
killed by TERM signal
Sep 26 16:24:44 myserver init: tty (/dev/tty6) main process (3726)
killed by TERM signal

And after spontaneous reboot
EXT4-fs (dm-6): mounted filesystem with ordered data mode. Opts: (null)
EXT4-fs (dm-6): error count: 5
EXT4-fs (dm-6): initial error at 1378602406: ext4_journal_start_sb:296
EXT4-fs (dm-6): last error at 1378640505: ext4_put_super:772
EXT4-fs (dm-6): error count: 5
EXT4-fs (dm-6): initial error at 1378602406: ext4_journal_start_sb:296
EXT4-fs (dm-6): last error at 1378640505: ext4_put_super:772

First thing I'm going to run an fsck against the filesystem, but also
info on best options to adopt in this use case would be appreciated.

Thanks in advance,
Gianluca