zfs discuss - Dec 2008 - General question about ZFS and RAIDZ

Hello to the forum,

with my general question about ZFS and RAIDZ I want the following to know:
Must all harddisks for the storage pool have the same capacity or is it possible
to use harddisks with different capacities?

Many thanks for the answers.

Best regards

JueDan
-- 
This message posted from opensolaris.org

> with my general question about ZFS and RAIDZ I want the following to know:
> Must all harddisks for the storage pool have the same capacity or is it
possible to use harddisks with different capacities?
Lowest common denominator applies here. Creating a RAIDZ from a 100GB,
200GB and 300GB disk will only use 100GB from each disk.

That is until you''re replacing the 100GB one with e.g. a 200GB one, the
array grows automatically.

-mg

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>>> with my general question about ZFS and RAIDZ I want the following
to
>>> know:
>>> Must all harddisks for the storage pool have the same capacity or
is
>>> it possible to use harddisks with different capacities?
>>
>> Lowest common denominator applies here. Creating a RAIDZ from a 100GB,
>> 200GB and 300GB disk will only use 100GB from each disk.
>>
>> That is until you''re replacing the 100GB one with e.g. a 200GB
one, the
>> array grows automatically.
> 
> Ah, ok. Thanks for your answer.
Depending on how much disks you plan to use, you might want to group
them in two or more RAIDZ according to disk sizes to minimize the loss
of diskspace, as long the gain outweighs the space loss due to
additional parity disk(s).

-mg

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