[OpenIndiana-discuss] can't mirror these disks

[Jan Owoc]

On Thu, Jun 28, 2012 at 9:31 AM, Daniel Kjar <dkjar at elmira.edu> wrote:
> Anyone have a clue why?  This is on 151a4
>
> dsk at bio1:/# zpool attach home c8t0d0 c8t1d0
> cannot attach c8t1d0 to c8t0d0: devices have different sector alignment
> c8t1do:
>
> ascii name  = <ATA-ST1500DM003-9YN1-CC4C-1.36TB>
[...]
> ascii name  = <ATA-ST31500541AS-CC34-1.36TB>

I had this error when one of my drives had 512b native sectors and the
other had 4k native sectors. I don't think I was able to do a mirror
either direction (i.e. you installed to 512b and are trying to mirror
onto 4k, and I think I also tried installing on 4k and mirroring to
512b with the same error you have).

A quick Internet search reveals that the "...DM003" has 4k sectors
natively [1] while "...541AS" has 512b sectors natively [2].

[1] http://www.seagate.com/staticfiles/support/docs/manual/desktop/Barracuda%207200.14/100686584d.pdf
[2] http://www.seagate.com/staticfiles/support/disc/manuals/desktop/Barracuda%20LP/100564361a.pdf
(look for Table 1 ~page 10-11)

I wasn't able to find a solution, so I now have a non-mirrored root
pool. Does anyone know how to override this sector alignment issue?

Jan