I don't know if this helps or not but I'm having a very similar problem with RAID on a server still running Red Hat 9. lsraid shows partitions going away all the time but if I check again a day or two later they are fine again. I was never able to find any reason for that but it's been over a year now and still no data loss. It does make me VERY nervous every time it happens.
Michael Mansour wrote:
Hi,
I've just noticed I have the following issue on my /home (/dev/md5) software RAID mirror:
[root@gazelle root]# lsraid -a /dev/md5
[dev 9, 5] /dev/md5 6A995494.6BAA9433.BC09B08A.778BCE84 online
[dev ?, ?] (unknown) 00000000.00000000.00000000.00000000 missing
[dev 34, 8] /dev/hdg8 6A995494.6BAA9433.BC09B08A.778BCE84 good
With the raidtab showing:
raiddev /dev/md5 raid-level 1 nr-raid-disks 2 chunk-size 64 persistent-superblock 1 nr-spare-disks 0 device /dev/hde8 raid-disk 0 device /dev/hdg8 raid-disk 1
and the /proc/mdstat shows:
md5 : active raid1 hdg8[1] 20972736 blocks [2/1] [_U]
As /dev/md5 is my /home directory, I don't want to lose any data. How can I fix this to get /dev/hde8 into the md5 raidset without losing my data?
-- Greg Gulik http://www.gulik.org/greg/ greg @ gulik.org
