Forgive me if this issue has already been seen on this list, I was unable to
find...
I had setup two jfs filesystems to journal to two separate external journal
devices. The two jfs filesystems are /dev/sda1 and /dev/sdb1. The external
journal devices are /dev/md7 and /dev/md8. The md devices were created
using mdadm to setup mirrors on two internal scsi disks. The jfs
filesystems, /dev/sda1 and /dev/sdb1 are on an external RAID box.
The problem that I'm having is, after a reboot, neither of the filesystems
would mount read/write. I could mount read-only. So, we figured journal
problem and reattached the external journal devices using 'jfs_tune -J
device=/dev/md7 /dev/sda1'. But, again, after a reboot, the journal devices
could not be found and so we had to re-attach again.
We did this several times and tried to determine what was changing and
causing the journal to not be found. At some point in this process, both of
the external journal devices became corrupt and now I can't mount read/write
at all.
I've tried to re-initialize the devices with:
mkfs_jfs -J journal_dev /dev/md7, but this fails with "The specified disk
did not finish formatting".
When I try and attach the external journal to a filesystem, I get "Error
attaching JFS external journal to JFS FS".
I can mkfs_jfs /dev/md7 just fine. But, when I try and format it as a
journal device, it fails. An strace on the process shows:
...open("/dev/md7", ) ..... (Device or resource busy)...
I'm running Redhat Enterprise Linux 4 with a 2.6.9-5.0.5 kernel. This is
the default redhat kernel with some extra filesystem support added
(including jfs external journaling).
Thanks in advance for any help offered.
Jeff Block
Programmer / Analyst
Radiology Research Computing
University of California, San Francisco
(415) 476-1709
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