zfs discuss - Mar 2010 - zpool creation question - should i add slice number?

Hi,

I`m creating zpool mirror with 2 hdd`s. Question - should I mention the slice
number while creating the mirror?

I`ve done it that way:

bash-3.00# zpool create -f zones mirror c1t2d0 c1t3d0

Is that OK? 

AFAIK - according to solaris disk mapping, s0 - is a slice, s2 - is a whole disk
slice...
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On 01/03/2010 11:13, Nik Masloff wrote:
> Hi,
>
> I`m creating zpool mirror with 2 hdd`s. Question - should I mention the
slice number while creating the mirror?
>
> I`ve done it that way:
>
> bash-3.00# zpool create -f zones mirror c1t2d0 c1t3d0
>
> Is that OK?
>    
Yes, that''s ok.

If you don''t specify a slice then zfs will put an EFI label with a S0 
partition representing entire disk (but reserved area) and will also 
automatically enable write cache on disks.


-- 
Robert Milkowski
http://milek.blogspot.com

On Mar 1, 2010, at 3:13 AM, Nik Masloff wrote:
> Hi,
> 
> I`m creating zpool mirror with 2 hdd`s. Question - should I mention the
slice number while creating the mirror?
Absolutely, positively yes.  Otherwise you won''t be able to boot from
the mirror because booting is not currently working from EFI labeled disks.
For more details, see the section on mirroring boot drives in the ZFS Admin
Guide. 
 -- richard

ZFS storage and performance consulting at http://www.RichardElling.com
ZFS training on deduplication, NexentaStor, and NAS performance
http://nexenta-atlanta.eventbrite.com (March 16-18, 2010)

Thanks for reply!

This mirror is used by zones, no need to boot from it.
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