ZFS RaidZ2 with 24 drives?

[Thomas Burgess]

you should avoid it.  if you want more information about why this is a BAD
idea, read this post:
http://forums.freebsd.org/showpost.php?p=22025&postcount=17

you should keep in mind each raidz group is seen by zfs more or less as a
single hard drive...you should stick to groups NO BIGGER than 9 drives


personally, i use 4-5 drives for raidz1 and 6-8 drives for raidz2

also, keep in mind, while you do loose a LITTLE space, you gain a ton more
MTTF
it's very much worth it.  I'd go with 3 groups of 8 or 4 groups of 6

24 in one group = 33 TB

3 groups of 8 = 27 TB

4 groups of 6 = 24 TB

personally, i'd go with the 3 groups of 8


On Tue, Dec 15, 2009 at 10:34 AM, Solon Lutz <solon at pyro.de> wrote:

> Hi,
>
> are there any cons against building a RaidZ2 with 24 1.5TB drives?
> In some old postings floating around the net a limit of 9 drives
> is recommended.
> Does this still apply to the current ZFS in 8.0?
>
>
> Best regards,
>
> Solon Lutz
>
>
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