[OpenIndiana-discuss] Doubt on ZFS

[Basil Kurian]

HI
*
I have some doubts on ZFS.*

[root at beastie /etc]# zpool create nas da0 da1
[root at beastie /etc]# zpool list
NAME   SIZE   USED  AVAIL    CAP  HEALTH  ALTROOT
nas   23.9G  73.5K  23.9G     0%  ONLINE  -
[root at beastie /etc]# zpool add nas da2
[root at beastie /etc]# zpool list
NAME   SIZE   USED  AVAIL    CAP  HEALTH  ALTROOT
nas   35.8G   134K  35.8G     0%  ONLINE  -


*Then I stored one big file on /nas . after that , I tried to remove newly
attached disk.*


[root at beastie /etc]# du -sh /nas/huge_file
464M    /nas/huge_file
[root at beastie ~]# zpool remove nas da2
cannot remove da2: only inactive hot spares or cache devices can be removed
[root at beastie ~]# zpool offline  nas da2
cannot offline da2: no valid replicas
[root at beastie ~]# zpool detach  nas da2
cannot detach da2: only applicable to mirror and replacing vdevs

*
Though the data stored in the pool is much less that the size of individual
disks ,  I 'm unable to remove any of the members from the pool. How can I
do that without losing data ?
*



*I have one more doubt*

[root at beastie ~]# zpool create nas mirror ad4 ad6 mirror da0 da1
[root at beastie ~]# zpool status
  pool: nas
 state: ONLINE
 scrub: none requested
config:

    NAME        STATE     READ WRITE CKSUM
    nas         ONLINE       0     0     0
      mirror    ONLINE       0     0     0
        ad4     ONLINE       0     0     0
        ad6     ONLINE       0     0     0
      mirror    ONLINE       0     0     0
        da0     ONLINE       0     0     0
        da1     ONLINE       0     0     0

[root at beastie ~]# zpool detach nas da0
[root at beastie ~]# zpool status
  pool: nas
 state: ONLINE
 scrub: none requested
config:

    NAME        STATE     READ WRITE CKSUM
    nas         ONLINE       0     0     0
      mirror    ONLINE       0     0     0
        ad4     ONLINE       0     0     0
        ad6     ONLINE       0     0     0
      da1       ONLINE       0     0     0

errors: No known data errors

[root at beastie ~]# zpool attach nas da0
missing <new_device> specification
[root at beastie ~]# zpool attach nas da0 da1
invalid vdev specification
use '-f' to override the following errors:
/dev/da1 is part of active pool 'nas'


*How can I reattach it to the pool ?*


*Finally one more doubt too*
[root at beastie ~]# zpool create nas mirror ad4 ad6 mirror da0 da1

*can we do this in two steps. something like*

[root at beastie ~]# zpool create nas1 mirror ad4 ad6
[root at beastie ~]# zpool create nas2 mirror da0 da1
[root at beastie ~]# zpool create nas nas1 nas 2
cannot open 'nas1': no such GEOM provider
must be a full path or shorthand device name


-- 
Regards

Basil Kurian
<http://basilkurian.tk>