(resend, prev post missed the list)
Neil Brown wrote:
> On Monday April 24, anssi.hannula@xxxxxxxxx wrote:
>
>># mdadm --grow /dev/md_d1 --raid-devices=3 --backup-file backupfile
>>mdadm: Need to backup 128K of critical section..
>>mdadm: /dev/md_d1: Cannot get array details from sysfs
>>
>>Strace shows that it's trying to access
>>"/sys/block/md_d4/md/component_size".
>>
>>Why is this?
>
>
> Because I didn't test my code properly :-(
>
> Following patch should fix it.
>
It appears you missed another occurrence (patch attached).
However, it got stuck after
mdadm: Need to backup 128K of critical section..
I did ctrl-c, and according to /proc/mdstat it was successfully
reshaped, nor can I restart the reshape.
But "umount /mnt/test" (/mnt/test is where /dev/md_d1p1 is mounted)
blocks, and this time it becomes unkillable.
/proc/mdstat reports:
md_d1 : active raid5 loop1[1] loop0[0]
4992 blocks level 5, 64k chunk, algorithm 2 [3/2] [UU_]
--
Anssi Hannula
--- sysfs.c.old 2006-04-24 01:24:09.000000000 +0300
+++ sysfs.c 2006-04-24 01:33:48.000000000 +0300
@@ -69,7 +69,7 @@
sprintf(sra->name, "md%d", minor(stb.st_rdev));
else
sprintf(sra->name, "md_d%d",
- minor(stb.st_rdev)/16);
+ minor(stb.st_rdev)/64);
} else {
if (devnum >= 0)
sprintf(sra->name, "md%d", devnum);
