Re: Raid 1 array degrades on reboot [resolved]

[David Watson <David.Watson@team17.com>]

Neil Brown wrote:
> On Thu, 17 Jun 2010 11:15:11 +0100
> David Watson <David.Watson@team17.com> wrote:
> 
>> Hello,
>>
>> Recently I upgraded to 2Tb disks on one of my servers, I built a new
>> degraded raid1 array:
>> mdadm --create /dev/md7 -level 1 --raid-devices=2 missing /dev/sdd1
>>
>> added its entry to /etc/mdadm/mdadm.conf then I rebooted to add the
>> second disk and added it to the array:
>> mdadm --manage /dev/md7  --add /dev/sdb1
>>
>> I updated /etc/mdadm/mdadm.conf, although I noticed no difference in the
>> output of:
>> mdadm --detail --scan
>>
>>
>> I use a monolithic kernel so there is no ramdisk to regenerate. This is
>> my first 1.00 array, and the existing 0.9 arrays have never shown this
>> issue. I have attempted the same process on a test server with no
>> issues, and I can't really think of what to look at next.
>>
>> apologies for the long post.
>>
> 
> Long posts are good....
> However I cannot see in your long post what the actual problem is.
> You have given no evidence that anything degrades on boot.
> No kernel logs, no "/proc/mdstat immediately after boot"...
> 
> More info please.
> 
> NeilBrown
> --

Trivial error:

/etc/mdadm/mdadm.conf
DEVICE /dev/sda* /deb/sdb* /dev/sdc* /dev/sdd*

Typo: /deb/sdb* should have been /dev/sdb*

Apologies, its taken a week for me to spot this.

Array now remains synchronised through a reboot.


Thanks

David Watson