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From: Daniel Pocock <daniel@pocock.pro>
To: linux-btrfs@vger.kernel.org
Subject: RAID1 migrate to bigger disks
Date: Sat, 24 Jan 2015 15:32:44 +0100	[thread overview]
Message-ID: <54C3AD0C.7080407@pocock.pro> (raw)




I've got a RAID1 on two 1TB partitions, /dev/sda3 and /dev/sdb3

I'm adding two new disks, they will have bigger partitions /dev/sdc3 and
/dev/sdd3

I'd like the BtrFs to migrate from the old partitions to the new ones as
safely and quickly as possible and if it is reasonable to do so, keeping
it online throughout the migration.

Should I do the following:

btrfs device add /dev/sdc3 /dev/sdd3 /mnt/btrfs0
btrfs device delete /dev/sda3 /dev/sdb3 /mnt/btrfs0

or should I do it this way:

btrfs device add /dev/sdc3 /mnt/btrfs0
btrfs device delete /dev/sda3 /mnt/btrfs0
btrfs device add /dev/sdd3 /mnt/btrfs0
btrfs device delete /dev/sdb3 /mnt/btrfs0

or is there some other way to go about it?


             reply	other threads:[~2015-01-24 14:32 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-24 14:32 Daniel Pocock [this message]
2015-01-24 14:36 ` RAID1 migrate to bigger disks Hugo Mills
2015-01-24 14:46   ` Daniel Pocock
2015-01-24 15:47     ` Martin Steigerwald
2015-01-25  5:07     ` Paul Jones

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