On Sun, Feb 8, 2009 at 1:29 AM, Frank Cusack <fcus...@fcusack.com> wrote:
>
> what mirror?  there is no mirror.  you have a raidz.  you can have 1
> disk failure.

Thanks for the correction. I was thinking RAIDZ, but typed "mirror". I
have only RAIDZs on my servers.

>
>> - if disks a and c fail, then I will be be able to read from disks b
>> and d. Is this understanding correct ?
>
> no.  you will lose all the data if 2 disks fail.
>
> The part of the slides you are referring to is in reference to ditto
> blocks, which allow failure of PARTS of a SINGLE disk.
>

Thanks. I've started to read the various ZFS documentation.


-- Sriram
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