#  for file in 1 2 3 4
> do
> mkfile 64m file${file}  
> done
# zpool create test raidz /tmp/file1 /tmp/file2 /tmp/file3 spare /tmp/file4
# for i in 5 6 7 8
> do
> mkfile 64m file${i}
> done
# zpool create test2 raidz /tmp/file5 /tmp/file6 /tmp/file7
# zpool status -v test test2
  pool: test
 state: ONLINE
 scrub: none requested
config:

	NAME            STATE     READ WRITE CKSUM
	test            ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file1  ONLINE       0     0     0
	    /tmp/file2  ONLINE       0     0     0
	    /tmp/file3  ONLINE       0     0     0
	spares
	  /tmp/file4    AVAIL   

errors: No known data errors

  pool: test2
 state: ONLINE
 scrub: none requested
config:

	NAME            STATE     READ WRITE CKSUM
	test2           ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file5  ONLINE       0     0     0
	    /tmp/file6  ONLINE       0     0     0
	    /tmp/file7  ONLINE       0     0     0

errors: No known data errors
#  zpool replace test /tmp/file2 /tmp/file4
# zpool status -v
 
  pool: test
 state: ONLINE
 scrub: resilver completed after 0h0m with 0 errors on Thu Feb 14 10:40:17 2008
config:

	NAME              STATE     READ WRITE CKSUM
	test              ONLINE       0     0     0
	  raidz1          ONLINE       0     0     0
	    /tmp/file1    ONLINE       0     0     0
	    spare         ONLINE       0     0     0
	      /tmp/file2  ONLINE       0     0     0
	      /tmp/file4  ONLINE       0     0     0
	    /tmp/file3    ONLINE       0     0     0
	spares
	  /tmp/file4      INUSE     currently in use

errors: No known data errors

  pool: test2
 state: ONLINE
 scrub: none requested
config:

	NAME            STATE     READ WRITE CKSUM
	test2           ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file5  ONLINE       0     0     0
	    /tmp/file6  ONLINE       0     0     0
	    /tmp/file7  ONLINE       0     0     0

errors: No known data errors

# zpool detach test /tmp/file2 
# zpool status -v test
  pool: test
 state: ONLINE
 scrub: resilver completed after 0h0m with 0 errors on Thu Feb 14 10:40:17 2008
config:

	NAME            STATE     READ WRITE CKSUM
	test            ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file1  ONLINE       0     0     0
	    /tmp/file4  ONLINE       0     0     0
	    /tmp/file3  ONLINE       0     0     0

errors: No known data errors

# zpool replace test /tmp/file4 /tmp/file2
# zpool status -v
  pool: extra
 state: ONLINE
 scrub: none requested
config:

  pool: test
 state: ONLINE
 scrub: resilver completed after 0h0m with 0 errors on Thu Feb 14 10:43:12 2008
config:

	NAME              STATE     READ WRITE CKSUM
	test              ONLINE       0     0     0
	  raidz1          ONLINE       0     0     0
	    /tmp/file1    ONLINE       0     0     0
	    replacing     ONLINE       0     0     0
	      /tmp/file4  ONLINE       0     0     0
	      /tmp/file2  ONLINE       0     0     0
	    /tmp/file3    ONLINE       0     0     0

errors: No known data errors

  pool: test2
 state: ONLINE
 scrub: none requested
config:

	NAME            STATE     READ WRITE CKSUM
	test2           ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file5  ONLINE       0     0     0
	    /tmp/file6  ONLINE       0     0     0
	    /tmp/file7  ONLINE       0     0     0

errors: No known data errors
# zpool status -v

  pool: test
 state: ONLINE
 scrub: resilver completed after 0h0m with 0 errors on Thu Feb 14 10:43:12 2008
config:

	NAME            STATE     READ WRITE CKSUM
	test            ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file1  ONLINE       0     0     0
	    /tmp/file2  ONLINE       0     0     0
	    /tmp/file3  ONLINE       0     0     0

errors: No known data errors

  pool: test2
 state: ONLINE
 scrub: none requested
config:

	NAME            STATE     READ WRITE CKSUM
	test2           ONLINE       0     0     0
	  raidz1        ONLINE       0     0     0
	    /tmp/file5  ONLINE       0     0     0
	    /tmp/file6  ONLINE       0     0     0
	    /tmp/file7  ONLINE       0     0     0

errors: No known data errors