I found this:
http://www.devinzuczek.com/anything-at-all/raid5-cannot-start-dirty-degraded-array-for-mdn/
It indicates that you should be able to do "mdadm --manage /dev/md0
--run". I have never ended up in this situation so I don't know if
it'll work.
***** Parent of /run/mdadm does not exist. Maybe set different
RUN_DIR=
***** e.g. make RUN_DIR=/dev/.mdadm
***** or set CHECK_RUN_DIR=0
make: *** [check_rundir] Error 1
[justin@BigBlue mdad]$
You don't have to do "make install", you can just do "make" and find
the resulting mdadm binary and use ./mdadm to run it from current dir.
You probably only need it to actually get the array up and running
again, then your system mdadm will be fine. Btw, post "mdadm --version"
and "uname -a" so we know what kernel and mdadm version you're running.
-- Mikael Abrahamsson email: swmike@xxxxxxxxx
Thanks Mikael.
I am running:
[justin@BigBlue Desktop]$ mdadm --version
mdadm - v3.2.6 - 25th October 2012
[justin@BigBlue Desktop]$ uname -a
Linux BigBlue 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux
A bit unscientifically, I tried assembling again and nothing happened.
Then I tried stopping the array again, and then forcing an assemble.
This worked. I then added the new drive and the array is reporting that
it is rebuilding! Below is the command output. I will report back in a
day or so as it is a 15TB array - it will take a day to rebuild.
[root@BigBlue Desktop]# mdadm --assemble --scan --force
[root@BigBlue Desktop]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : inactive sdf1[8](S) sde1[2] sdg1[4] sdd1[1] sdh1[7] sdc1[0]
sdb1[6]
20510934584 blocks super 1.2
[root@BigBlue Desktop]# mdadm --assemble --force /dev/md0
/dev/sd{b,c,d,e,g,h}1
mdadm: /dev/sdb1 is busy - skipping
mdadm: /dev/sdc1 is busy - skipping
mdadm: /dev/sdd1 is busy - skipping
mdadm: /dev/sde1 is busy - skipping
mdadm: /dev/sdg1 is busy - skipping
mdadm: /dev/sdh1 is busy - skipping
[root@BigBlue Desktop]# mdadm --stop /dev/md0
mdadm: stopped /dev/md0
[root@BigBlue Desktop]# mdadm --assemble --force /dev/md0
/dev/sd{b,c,d,e,g,h}1mdadm: Marking array /dev/md0 as 'clean'
mdadm: /dev/md0 has been started with 6 drives (out of 7).
[root@BigBlue Desktop]# mdadm --manage /dev/md0 --add /dev/sdf1
mdadm: added /dev/sdf1
[root@BigBlue Desktop]# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid6 sdf1[8] sdc1[0] sdb1[6] sdh1[7] sdg1[4] sde1[2]
sdd1[1]
14650666880 blocks super 1.2 level 6, 128k chunk, algorithm 2
[7/6] [UUU_UUU]
[>....................] recovery = 0.0% (2017024/2930133376)
finish=725.8min speed=67234K/sec
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
