Chris,

You would need to replace all the disks to see the expanded space. 
Otherwise, space on the 1-2 larger disks would be wasted. If
you replace all the disks with larger disks, then yes, the
disk space in the raidz config would be expanded.

A ZFS mirrored config would be more flexible but it uses more space,
obviously. For example, you could start with a two-disk mirrored config, 
replace those disks with large disks, eventually add another two-disk
mirror, or even add disks to create two 3-way mirrors. Then, change your 
mind and detach one disk from each mirror.

I hope you've seen the best practices site. You might get more ideas
about whether you want to use slices or not. Eventually, you could
replace a sliced config with a whole disk config...

http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide

Cindy

Chris Gilligan wrote:
>>Chris,
>>
>>You can replace the disks one at a time with larger
>>disks. No problem.
>>You can also add another raidz vdev, but you can't
>>add disks to an
>>existing raidz vdev.
>>
>>See the sample output below. This might not solve all
>>your problems,
>>but should give you some ideas...
>>
>>Cindy
> 
> 
> Cindy,
> What you said would be perfect if i could just replace 1-2 disks at a time 
> (think per month). What i might need to do is split the disks into multi 
> partitions so i can use all the space but then again that wont work as you 
> can not add to a raidz. Also are you sure the size of a raidz will increase 
> if you replace all the disks?
> 
> If the raidz supports disks of different sizes in the raid i would be set. I 
> noticed some discussion on this topic but for now it seems like it is not 
> looking good.
> 
> I guess there just is not really any file systems designed for buget file 
> storage expansion. I was really hoping there was a way. but even replacing 
> 5-6 disks at once is too costly for me
> 
> Chris
>  
>  
> This message posted from opensolaris.org
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