Re: trouble adding spare

[Max Waterman <davidmaxwaterman@fastmail.co.uk>]

Beolach wrote:
> On Wed, Jan 21, 2009 at 10:21 AM, Max Waterman
> <davidmaxwaterman@fastmail.co.uk> wrote:
>   
>> Someone else's post prompted me to try :
>>
>> $ sudo /sbin/mdadm --detail --scan
>> ARRAY /dev/md2 level=raid5 num-devices=6 metadata=00.90 spares=2
>> UUID=15bfec75:595ac793:0914f8ee:862effd8
>>
>> and use that in mdadm.conf instead of the output of :
>>
>> ~$ sudo /sbin/mdadm --examine --scan
>> ARRAY /dev/md2 level=raid5 num-devices=6
>> UUID=15bfec75:595ac793:0914f8ee:862effd8
>>  spares=2
>>
>> This fixes my problem of the second spare drive not being added. I'm not
>> sure why.
>>
>> However, mdadm now gives me a 'message' :
>>
>> mdadm: metadata format 00.90 unknown, ignored.
>>
>> What's this about? Anything to worry about?
>>
>>     
>
> Change it to metadata=0.90 instead of metadata=00.90 & it should work
> w/out the error message.  It would probably be good if mdadm.conf
> and/or mdadm --detail --scan dropped leading zeros.
>   
Yup, that fixed the error.

Any ideas why it didn't work with the output of --examine?

Max.