> Also, I don't have a feel for how replacing more than 1 drives in a RaidZ[23]
> affects resilver performance.
Thats okay Erik, you've provided the information I need. This is a RAIDZ zpool,
I think I'll wait and see how it goes before moving on.
I cried seeing 673hrs remaining at 7% completion, the price we pay for being
green (and cheap!).
Cheers,
Andre
Date: Sun, 23 May 2010 17:44:21 -0700
From: erik.trim...@oracle.com
To: andreas_wants_the_w...@hotmail.com
CC: zfs-discuss@opensolaris.org
Subject: Re: [zfs-discuss] zfs replace multiple drives
On 5/23/2010 5:00 PM, Andreas Iannou wrote:
Is it safe or possible to do a zpool replace for multiple drives at once? I
think I have one of the troublesome WD Green drives as replacing it has taken
39hrs and only reslivered 58Gb, I have another two I'd like to replace but I'm
wondering whether I should do that now as the other is being resilvered or wait
till (a month) till this has finished.
Cheers,
Andre
You can replace drives up to the number of redundant drives in your vdev,
without loosing data.
Thus:
2-way mirror: 1 drive
3-way mirror: 2 drives
N-way mirror: N-1 drives
RaidZ1: 1 drive
RaidZ2: 2 drives
RaidZ3: 3 drives
If you have more than 1 vdev in a pool, then the above rule apply to EACH vdev.
Of course, if you replace the maximum number above, you have no protection
against failure for the period it takes to rebuild/resilver the vdev.
Also, I don't have a feel for how replacing more than 1 drives in a RaidZ[23]
affects resilver performance.
--
Erik Trimble
Java System Support
Mailstop: usca22-123
Phone: x17195
Santa Clara, CA
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