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mdadm inactive array at boot
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MasterPrenium
Tux's lil' helper
Tux's lil' helper


Joined: 07 Dec 2006
Posts: 89

PostPosted: Sun Oct 04, 2015 11:18 pm    Post subject: mdadm inactive array at boot Reply with quote

Hi guys,

I'm having an issue since a long date, which is ennoying me on multiple gentoo systems I setted-up.
My issue is with mdadm.
When booting, most of time (not always), I'm having some arrays that doesn't start, and I can't find where I missed something.

Quote:
# cat /etc/mdadm.conf | tail -n 1
ARRAY /dev/md/5 metadata=1.2 UUID=b2bdfcac:7913c315:a846fef1:0c6d9b6c name=ostest:5


Quote:
# cat /proc/mdstat
md5 : inactive sdb5[1](S)
314441728 blocks super 1.2


Quote:
# rc-update show | grep mdadm
mdadm | boot


Of course if I manually do
mdadm --stop /dev/md5 && mdadm --assemble /dev/md5

It's working, but I would like to have it auto started...

Quote:
# mdadm --detail /dev/md5
/dev/md5:
Version : 1.2
Creation Time : Thu Oct 1 14:37:03 2015
Raid Level : raid1
Array Size : 314441728 (299.88 GiB 321.99 GB)
Used Dev Size : 314441728 (299.88 GiB 321.99 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent

Intent Bitmap : Internal

Update Time : Mon Oct 5 01:11:16 2015
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0

Name : ostest:5 (local to host ostest)
UUID : 1aecd804:f2c08c96:6211f583:3aa5c890
Events : 565

Number Major Minor RaidDevice State
0 8 5 0 active sync /dev/sda5
1 8 21 1 active sync /dev/sdb5


Where did I missed something ? :oops:


Last edited by MasterPrenium on Mon Oct 05, 2015 12:44 pm; edited 1 time in total
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frostschutz
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Joined: 22 Feb 2005
Posts: 2970
Location: Germany

PostPosted: Sun Oct 04, 2015 11:50 pm    Post subject: Re: mdadm inactive array at boot Reply with quote

MasterPrenium wrote:
ARRAY /dev/md/5 metadata=1.2 UUID=b2bdfcac:7913c315:a846fef1:0c6d9b6c name=ostest:5


Try changing it to:

Code:
ARRAY /dev/md5 UUID=b2bdfcac:7913c315:a846fef1:0c6d9b6c


That's all you need, all other conditions (name, etc.) can prevent it from working.

Apart from that, show dmesg and mdadm --examine /dev/sd*, preferably full output no | tail | grep etc.
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