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
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