[OpenIndiana-discuss] Does the latest OI version allow ashift=12 for zpool creation?

[jason matthews]

If your new drives are misrepresenting their sector size you can 
override the sector size, thanks to george wilson, in sd.conf. this is 
common for SSDs.

http://wiki.illumos.org/display/illumos/List+of+sd-config-list+entries+for+Advanced-Format+drives

You can gather the data for the identifying text from iostat -En or 
format -> select disk -> inquiry

once the zpool created you can verify with zdb -vv <zpool> |grep ashfit


j.

On 10/27/15 11:17 AM, andy thomas wrote:
> I admit I haven't been on this forum for years, such is the 
> reliability of my OI 148 server built in 2011. I'm using 3 x 2 TB 
> WD2002FAEX 512-byte sector disks for a ZFS RAIDz1 pool in this and 
> about a year ago, one of these disks failed - I tried fitting a more 
> recent WD2002 disk with 4k sectors but zpool replace complained about 
> the sector mismatch and in the end I had to find another WD2002FAEX 
> (and it was quite expensive too).
>
> This server is now free to be rebuilt so I upgraded it today to OI 
> 151a9 but the latest zpool doesn't seem to offer the option to set the 
> ashift value. I wondered if I installed the latest OI from DVD, 
> destroying the original pool, would zpool default to using ashift=12? 
> This would allow me to use both 512 and 4096 byte sectors in vdevs.
>
> Andy
>
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