Re: [BK PATCHES] add ata scsi driver

[Lincoln Dale]

At 11:21 AM 27/05/2003 -0400, Jeff Garzik wrote:
>ATA defines WWN too...  I'm curious what the format is?  uuid-ish?

FC uses a 64-bit identifier for a WWN.

you end up with things like "50:00:0e:10:00:00:01:1c".
ironically, FC switching doesn't actually 'use' the WWN but a 24-bit FC_ID.

for things like mappings -- who knows -- perhaps WWN is good -- perhaps 
something like a serial # is also good -- perhaps both are good?

         mel-stglab-mds9509-1# show scsi-target lun vsan 1

         - DF350F from HITACHI (Rev 0000)
           FCID is 0x7f0002 in VSAN 1, PWWN is 50:00:0e:10:00:00:01:1c
           ------------------------------------------------------------------------------
           LUN    Capacity  Status  Serial Number    Device-Id
                  (MB)
           ------------------------------------------------------------------------------
           0x0    16651     Online                   C:2 A:0 T:1 HITACHI 
D35067950000
           0x1    16651     Online                   C:2 A:0 T:1 HITACHI 
D35067950001

         - ST318452FC from HP (Rev HP03)
           FCID is 0x7f01da in VSAN 1, PWWN is 22:00:00:04:cf:8c:1f:95
           ------------------------------------------------------------------------------
           LUN    Capacity  Status  Serial Number    Device-Id
                  (MB)
           ------------------------------------------------------------------------------
           0x0    17920     Online  3EV0JVQJ         C:1 A:0 T:3 
20:00:00:04:cf:8c:1f:95
         [..]

cheers,

lincoln.