zfs discuss - May 2009 - nonunique devids with Solaris 10 zfs

Hi,

I''m trying to get Solaris 10U6 on a old V240 with two new Seagate disks
using zfs as the root filesystem, but failed with this status:

----------------------------------------------------------------------
# zpool status
  pool: rpool
 state: DEGRADED
status: One or more devices could not be used because the label is missing or
        invalid.  Sufficient replicas exist for the pool to continue
        functioning in a degraded state.
action: Replace the device using ''zpool replace''.
   see: http://www.sun.com/msg/ZFS-8000-4J
 scrub: none requested
config:

        NAME                     STATE     READ WRITE CKSUM
        rpool                    DEGRADED     0     0     0
          mirror                 DEGRADED     0     0     0
            3665986270438154650  FAULTED      0     0     0  was
/dev/dsk/c0t0d0s0
            c0t1d0s0             ONLINE       0     0     0

errors: No known data errors
----------------------------------------------------------------------

I think the reason are nonunique devids for both drives

----------------------------------------------------------------------
# zdb -l /dev/dsk/c0t0d0s0 | egrep devid | head -1
                devid=''id1,sd at n5000000000000000/a''

# zdb -l /dev/dsk/c0t1d0s0 | egrep devid | head -1
                devid=''id1,sd at n5000000000000000/a''
----------------------------------------------------------------------

How is this ''devid'' generated and who makes sure these devids
will
getting unique? And will Update 7 or OpenSolaris help?

Any help is appreciated.

Willi

P.S. here some more informations about the drives:

Disk 0:
  SN:       3LM63XBW
  Model:    ST3300655LC
  Firmware: 0003
  LOT No:   A-01-0925-3

Disk 1:
  SN:       3LM62RDB
  Model:    ST3300655LC
  Firmware: 0003
  LOT No:   A-01-0925-3

On Tue, 26 May 2009 10:19:06 +0200
Willi Burmeister <wib at cs.uni-kiel.de> wrote:
> Hi,
> 
> I''m trying to get Solaris 10U6 on a old V240 with two new Seagate
disks
> using zfs as the root filesystem, but failed with this status:
> 
> ----------------------------------------------------------------------
> # zpool status
>   pool: rpool
>  state: DEGRADED
> status: One or more devices could not be used because the label is missing
or
>         invalid.  Sufficient replicas exist for the pool to continue
>         functioning in a degraded state.
> action: Replace the device using ''zpool replace''.
>    see: http://www.sun.com/msg/ZFS-8000-4J
>  scrub: none requested
> config:
> 
>         NAME                     STATE     READ WRITE CKSUM
>         rpool                    DEGRADED     0     0     0
>           mirror                 DEGRADED     0     0     0
>             3665986270438154650  FAULTED      0     0     0  was
/dev/dsk/c0t0d0s0
>             c0t1d0s0             ONLINE       0     0     0
> 
> errors: No known data errors
> ----------------------------------------------------------------------
> 
> I think the reason are nonunique devids for both drives
> 
> ----------------------------------------------------------------------
> # zdb -l /dev/dsk/c0t0d0s0 | egrep devid | head -1
>                 devid=''id1,sd at n5000000000000000/a''
> 
> # zdb -l /dev/dsk/c0t1d0s0 | egrep devid | head -1
>                 devid=''id1,sd at n5000000000000000/a''
> ----------------------------------------------------------------------
> 
> How is this ''devid'' generated and who makes sure these
devids will
> getting unique? And will Update 7 or OpenSolaris help?
Yes, that''ll be the most likely cause of the problem.

The devid is generated from the SCSI INQUIRY Page83 data
if that''s available, or Page80 if not, or faked in some
cases.

You can read more about devids in my presentation on them

http://www.jmcp.homeunix.com/~jmcp/WhatIsAGuid.pdf


> P.S. here some more informations about the drives:
> 
> Disk 0:
>   SN:       3LM63XBW
>   Model:    ST3300655LC
>   Firmware: 0003
>   LOT No:   A-01-0925-3
> 
> Disk 1:
>   SN:       3LM62RDB
>   Model:    ST3300655LC
>   Firmware: 0003
>   LOT No:   A-01-0925-3
I would have hoped that new Seagate disks would be providing
a correct response to the Page83 inquiry. 


James C. McPherson
--
Senior Kernel Software Engineer, Solaris
Sun Microsystems
http://blogs.sun.com/jmcp	http://www.jmcp.homeunix.com/blog
Kernel Conference Australia - http://au.sun.com/sunnews/events/2009/kernel