Messages in this thread | | | Date | Sun, 28 May 2006 00:14:11 +0200 | From | Arend Freije <> | Subject | RAID-1 and Reiser4 issue: umount hangs |
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Hi,
I'm using Reiser4 for my filesystems on disk (/dev/sda) , and it works just fine. Recently I bought a second disk (/dev/sdb) for RAID-1 mirroring. With mdadm I created a degraded raid-1 array on /dev/md/0, devices missing,/dev/sdb1. After that I created a Reiser4 filesystem on /dev/md/0 and mounted it at /mnt. Then I copied the data from /dev/sda1 to /mnt. All goes well until I umount /mnt, umount simply hangs without any error. Syslog doesn't report any error. In /proc/mdstat, the array remains "active sync". Shutting down linux fails because the umount is still waiting and seems to block other umounts. The umount process cannot be killed by the root. A hard reset is the only resolution to get my system functioning normally, but without the raid-1 of course. The problem seems to emerge only with the combination of RAID and Reiser4. I've created an ext-2 filesystem on /dev/md/0, and after that mount ; cp -ax ; umount works without a problem, and the hanging umount re-appears when using Reiser4 again.
My questions: - how can I find the cause of the hanging umount? - how can I fix it?
A few details of my linux-box:
Gentoo Linux, 2.6.16 kernel with Reiser4-for-2.6.16-2.patch.gz i686 AMD Athlon(tm) XP 2400+ DC4300 SATA-II controller (Silicon Image 3124, libata + sata_sil24 drivers) 2 x Samsung SP2504C hard disk
Thanx in advance,
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