run zfs list with following options to see if it is actually mounted:

zfs list -o name,mountpoint,canmount,mounted

HTH,
Nishchaya

Axelle Apvrille wrote:
> Hi,
> I've already sent a few posts around this issue, but haven't quite got the 
> answer - so I'll try to clarify my question :)
>
> Since I have upgraded from 2008.11 to 2009.06 a new BE has been created. On 
> ZFS, that corresponds to two file systems, both (strangely) mounted on /. The 
> old BE corresponds to a file system of 7G, the new one to a fs of 3G. As I 
> fall short of space and do not need the old 2008.11 any more, I would like to 
> work out how to delete it. I know I should do beadm destroy <name>. But 
> before I do that I would like to understand what I am erasing in those 7G 
> (makes sense, doesn't it ?). 
>
> In particular, I'd like to:
> - understand what's in that old 7G ?
> - understand why the new environment only takes 3G
> - possibly mount the old 7G to check what's inside ? I'm surprised it is said 
> to be mounted on /
> - understand what beadm destroy actually destroys !
>
> Thanks very much !
> Axelle
>
> $ zfs list
> NAME                       USED  AVAIL  REFER  MOUNTPOINT
> rpool                     42.1G  5.90G  1.42G  /a/rpool
> rpool/ROOT                10.5G  5.90G    18K  legacy
> rpool/ROOT/opensolaris    7.18G  5.90G  6.75G  /
> rpool/ROOT/opensolaris-1  3.30G  5.90G  7.39G  /
> rpool/dump                 895M  5.90G   895M  -
> rpool/export              28.4G  5.90G    19K  /export
> rpool/export/home         28.4G  5.90G   654M  /export/home
> rpool/export/home/axelle  27.8G  5.90G  27.4G  /export/home/axelle
> rpool/swap                 895M  6.69G  88.3M  -
>
> $ beadm list 
> BE            Active Mountpoint Space Policy Created          
> --            ------ ---------- ----- ------ -------          
> opensolaris   -      -          7.57G static 2009-01-03 13:18 
> opensolaris-1 NR     /          3.42G static 2009-07-20 22:38
>   


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