zfs 4k disk alignment gui

[Rolfieo]

I'm testing with FreeNAS 9 RC

I'm creating a new zpool with a couple of 4k drives.

but i have nowhere an option to create with for 4k drives.
Now my pool has an ashift of 9, and for optimal alignment it should be 12.

So i have a high performance NAS, with slow mis alignment disks.

Is this an issue with the RC?

 

[dlavigne]

This option was removed in the 9.x volume wizard. If it is important to you, please create an enhancement request ticket at support.freenas.org.

 

[cyberjock]

Oh my. 4k sector option was removed. That's kind of a big deal.

I remember back with 8.2 or 8.3 there was the push to make ashift 12 the default, and now we can't force a 4k sector size on our own.

That's like a step back :(

 

[cyberjock]

Ticket created after I verified that the ashift default isn't 12.

http://support.freenas.org/ticket/2404

Edit: I'm wondering if the the new volume manager uses the drive's reported sector size to smartly decide what option to use. Alot of drive still report 512-byte sector size despite having 4k sectors. I know all of my WD Green drives are 4k but smartctl says they are 512-byte. I learned the hard way how much ashift=9 sucks on 4k sector drives. :P

 

[cyberjock]

I'm testing with FreeNAS 9 RC

I'm creating a new zpool with a couple of 4k drives.

but i have nowhere an option to create with for 4k drives.
Now my pool has an ashift of 9, and for optimal alignment it should be 12.

So i have a high performance NAS, with slow mis alignment disks.

Is this an issue with the RC?

Can you post the output of smartctl -noserial -a /dev/da0 or whatever your drive is? There's some questions related to the ticket...

Thanks.

 

[delphij]

Please provide output from:

camcontrol identify ada0

if your disk is in the form of da0, use the following command instead:

camcontrol inquiry da0

Thanks in advance!

 

[Drk]

will do some testing tonight with my pools and seagate drives.

 

[daimi]

By default, FreeNAS will treat all disks as 4K sector (“Advanced Format”) disks. This is a future-proof setting that allows AF disks to later be used as replacement drives for older, legacy 512 byte sector drives without compromising performance. The administrator can optionally disable this 4K-by-default behavior by setting vfs.zfs.vdev.larger_ashift_minimal to 0 in both sysctl and loader tunables.

Source: http://www.freenas.org/whats-new/2013/12/freenas-9-2-0-release.html