cache devices come up as dsk/original_device_name in zpools

[Attila Nagy]

Hi,

A have a zpool with cache devices on 8-STABLE (csuped and compiled at 
Sep 14 15:01:25 CEST 2011). The problem is every time I reboot, the 
cache devices turn to UNAVAIL (because device name changes to dsk/daXX):
dsk/da37 UNAVAIL 0 0 0 cannot open
dsk/da38 UNAVAIL 0 0 0 cannot open

After removing and re-adding them, everyting goes back to normal, until 
the next reboot. I have no /boot/zfs/zpool.cache (because the machine is 
netbooted), maybe this is the cause? In previous versions everything was 
fine.

# zpool remove home dsk/da37
# zpool remove home dsk/da38
# zpool add home cache da37
# zpool add home cache da38

zpool status
   pool: home
  state: ONLINE
status: The pool is formatted using an older on-disk format.  The pool can
         still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'.  Once this is done, the
         pool will no longer be accessible on older software versions.
  scan: none requested
config:

         NAME         STATE     READ WRITE CKSUM
         home         ONLINE       0     0     0
           mirror-0   ONLINE       0     0     0
             da0      ONLINE       0     0     0
             da1      ONLINE       0     0     0
           mirror-1   ONLINE       0     0     0
             da10     ONLINE       0     0     0
             da11     ONLINE       0     0     0
           mirror-2   ONLINE       0     0     0
             da12     ONLINE       0     0     0
             da13     ONLINE       0     0     0
           mirror-3   ONLINE       0     0     0
             da14     ONLINE       0     0     0
             da15     ONLINE       0     0     0
           mirror-4   ONLINE       0     0     0
             da16     ONLINE       0     0     0
             da17     ONLINE       0     0     0
           mirror-5   ONLINE       0     0     0
             da18     ONLINE       0     0     0
             da19     ONLINE       0     0     0
           mirror-6   ONLINE       0     0     0
             da2      ONLINE       0     0     0
             da20     ONLINE       0     0     0
           mirror-7   ONLINE       0     0     0
             da21     ONLINE       0     0     0
             da22     ONLINE       0     0     0
           mirror-8   ONLINE       0     0     0
             da23     ONLINE       0     0     0
             da24     ONLINE       0     0     0
           mirror-9   ONLINE       0     0     0
             da25     ONLINE       0     0     0
             da26     ONLINE       0     0     0
           mirror-10  ONLINE       0     0     0
             da27     ONLINE       0     0     0
             da28     ONLINE       0     0     0
           mirror-11  ONLINE       0     0     0
             da29     ONLINE       0     0     0
             da3      ONLINE       0     0     0
           mirror-12  ONLINE       0     0     0
             da30     ONLINE       0     0     0
             da31     ONLINE       0     0     0
           mirror-13  ONLINE       0     0     0
             da32     ONLINE       0     0     0
             da33     ONLINE       0     0     0
           mirror-14  ONLINE       0     0     0
             da34     ONLINE       0     0     0
             da4      ONLINE       0     0     0
           mirror-15  ONLINE       0     0     0
             da5      ONLINE       0     0     0
             da6      ONLINE       0     0     0
           mirror-16  ONLINE       0     0     0
             da7      ONLINE       0     0     0
             da8      ONLINE       0     0     0
         logs
           da35       ONLINE       0     0     0
         cache
           da37       ONLINE       0     0     0
           da38       ONLINE       0     0     0

errors: No known data errors