It would be a manual process.  As with any arbitrary name, it's a useful 
tag, not much more.

James C. McPherson wrote:
> Gregory Shaw wrote:
>   
>> Hi.  I'd like to request a feature be added to zfs.  Currently, on  
>> SAN attached disk, zpool shows up with a big WWN for the disk.   If  
>> ZFS (or the zpool command, in particular) had a text field for  
>> arbitrary information, it would be possible to add something that  
>> would indicate what LUN on what array the disk in question might be.   
>> This would make troubleshooting and general understanding of the  
>> actual storage layout much simpler, as you'd know something about any  
>> disks that are encountering problems.
>>
>> Something like:
>>
>> zpool status
>>    pool: local
>> state: ONLINE
>> scrub: scrub completed with 0 errors on Sun Sep 23 04:16:33 2007
>> config:
>>
>>          NAME        STATE     READ WRITE CKSUM  NOTE
>>          local       ONLINE       0     0     0
>>            raidz1    ONLINE       0     0     0
>>              c2t0d0  ONLINE       0     0     0  Internal SATA on  
>> left side
>>              c2t2d0  ONLINE       0     0     0  Internal SATA on  
>> right side
>>              c2t3d0  ONLINE       0     0     0  External SATA disk 1  
>> in box on top
>>              c2t4d0  ONLINE       0     0     0  External SATA disk 2  
>> in box on top
>>          spares
>>            c2t5d0    AVAIL                       External SATA disk 3  
>> in box on top
>>
>> errors: No known data errors
>>
>>
>> The above would be very useful should a disk fail to identify what  
>> device is what.
>>     
>
> How would you gather that information?
> How would you ensure that it stayed accurate in
> a hotplug world?
>
>
>
> James C. McPherson
> --
> Senior Kernel Software Engineer, Solaris
> Sun Microsystems
> _______________________________________________
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> zfs-discuss@opensolaris.org
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>   
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