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Date: Tue, 15 Oct 2013 17:49:06 -0500
From: "James R. Van Artsdalen" <james-freebsd-current@jrv.org>
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Subject: Please shorten ZFS disk names.
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BLACKIE:/root# uname -a
FreeBSD BLACKIE.housenet.jrv 10.0-BETA1 FreeBSD 10.0-BETA1 #0 r256428M:
Sun Oct 13 23:46:54 CDT 2013    
root@CLANK.housenet.jrv:/usr/obj/usr/src/sys/GENERIC  amd64

This pool is on da{0,1,2,3,4,5,6,7} - I think, only da4 is sure

    NAME                                                         
STATE     READ WRITE CKSUM
    z03                                                          
ONLINE       0     0     0
      raidz2-0                                                   
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300HSTK 
ONLINE       0     0     0
        da4                                                      
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300HTCQ 
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300JDT5 
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300HTCE 
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300HTS7 
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300JBN1 
ONLINE       0     0     0
        diskid/DISK-%20%20%20%20%20%20%20%20%20%20%20%20Z300HTAP 
ONLINE       0     0     0

another example:

BLACKIE:/usr/src# zpool status
  pool: BLACKIE
 state: ONLINE
  scan: none requested
config:

    NAME                                          STATE     READ WRITE CKSUM
    BLACKIE                                       ONLINE       0     0     0
      gptid/3d882ab0-3588-11e3-b6bc-002590c08004  ONLINE       0     0     0

Based on the hardware config that's either ada0p3 or ada1p3.  Whichever
it is I want to mirror it onto the other but I don't the names to use
for src and dst.