On 01/26/2013 09:54 PM, Reginald Beardsley wrote:
> Having got the 3 TB disk working in the Solaris 10 system where it belongs, I 
> think I'll pass on doing battle w/ booting from disks > 2 TB.
> 
> I've got a zpool on a 3 TB USB disk actually functioning w/ 151_a7 which is a 
> big improvement, but it complains about the alignment.  I've been studying:
> 
> http://wiki.illumos.org/display/illumos/ZFS+and+Advanced+Format+disks
> 
> trying to find a way to fix that.  I put what looked like the correct 
> incantations in sd.conf, but a reboot doesn't seem to have solved it.  It 
> would be very helpful to know how closely the identifier string needs to be 
> to what format(1m) reports.  As I read things, it should be the concatenation 
> of the Vendor & Product strings. I tried to copy it exactly, but have no clue 
> if it read it correctly or just silently ignored it.
> 
> After modifying sd.conf and rebooting, mdb reports:
> 
>     un_sys_blocksize = 0x1000
>     un_tgt_blocksize = 0x1000
>     un_phy_blocksize = 0x200
> 
> for the USB disk.  However prtvtoc reports 4096 bytes/sector as does "format 
> -> verify"
> 
> Not sure where to from here.

Are you going to be using ZFS on those? If so, how does the ashift of a
zpool created with them look like?

# zdb <poolname> | grep ashift

If it prints "ashift: 12", then you are good, zpool picked up the
correct settings.

Cheers,
--
Saso

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