[OpenIndiana-discuss] Migrating root zpool from old disks to new one. only one system available

[Gary Gendel]

On 6/12/12 8:00 AM, Jim Klimov wrote:
>
> Did the 3TB disk also report to the OS that it uses 4k sectors?
> What ashift value is used by the pool, ultimately? Example:
> # zdb -l /dev/rdsk/c2t0d0s0 | grep ashift
>         ashift: 9
>         ashift: 9
>         ashift: 9
>         ashift: 9
>
> If your 4KB disks use ashift=9 it is possible to get problems
> worse than decreased performance ;)

I'm a bit confused.  I checked my mirrored Seagate ST33000651AS 3TB 
drives using this method and I see "ashift: 9".  I'm sure that the 
Seagates told them it had 512 sectors, but I thought that you couldn't 
see the whole 3TBs with 512 sectors.  I have these striped with a 1TB 
mirrored drive in the pool and zpool list shows 3.62T which seems about 
right.  Is my understanding flawed?

Gary