--- On Fri, 12/3/10, Asdo <asdo@shiftmail.org> wrote:

From: Asdo <redacted>
Subject: Reshaping the length of devices
To: "linux-raid" <redacted>
Date: Friday, 12 March, 2010, 15:15
I am wondering... is it possible to
reshape the length of the underlying devices with MD raid?

I mean like in the case one buys larger disks: after moving
the raid partitions to the new disks half of them is still
free. So one might want to extend the raid partitions to the
end of the disks instead of creating another array in the
free space.

I have searched the linux-raid mailing list history but I
couldn't find this topic.

Thanks in advance

As long as the size of ALL underlying devices have increased you can --grow=MAX to the a multiple of the now smallest drive.

From:

http://linux.die.net/man/8/mdadm

This value can be set with --grow for RAID level 1/4/5/6. If the array was created with a size smaller than the currently active drives, the extra space can be accessed using --grow. The size can be given as max  which means to choose the largest size that fits on all current drives. 


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N: Jon Hardcastle
E: Jon@eHardcastle.com
'Do not worry about tomorrow, for tomorrow will bring worries of its own.'

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