Topic: RAID Down... But command give us: mdadm: Cannot open /dev/sda1...

[Snoopyski]

Hello Everyone,

I get a message in my email about my RAID... My sda1 on md1 and my sda2 on md2 was failed...

But I try the command:

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mdadm -a /dev/md1 /dev/sda1
I get this:

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mdadm: Cannot open /dev/sda1: Device or resource busy
Any idea whitout rebooting the server to restart my RAID ?

Thanks,

Snoopyski

[Stefano]

hi

please send the result of

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cat /proc/mdstat

before trying to re-ad the partition to the raid, try to remove it with

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mdadm -r /dev/md1 /dev/sda1

if it does not work, maybe it's a hw (hd controller) problem.

Ciao

Stefano

[CharlieBrady]

I get a message in my email about my RAID... My sda1 on md1 and my sda2 on md2 was failed...

Probably because the drive actually has a problem.

But I try the command:

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mdadm -a /dev/md1 /dev/sda1

Did you check that the drive was error free before doing that?