ZFS help

Question

I am using open solaris and need help with zfs. I have a pool on the 3rd partition of a drive. The other partitions are NTFS. The disk size is 160 G and the 3rd partition's size is about 108 gigabyte. The pool's size is 20.3G and available is 5.05G. I recently filled it up so I moved some files off of it. There is plenty of space on the drive, and I want to increase the pool's size. I have looked at the documentation for zfs and zpool, but could not determine how to do it.
zpool status rpool
pool: rpool
state: ONLINE
scrub: scrub completed after 0h14m with 0 errors on Sun Jan 11 17:30:27 2009
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c6d0s0 ONLINE 0 0 0
errors: No known data errors
zfs list rpool
NAME USED AVAIL REFER MOUNTPOINT
rpool 20.3G 5.05G 58.5K /rpool
zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 20.3G 5.05G 58.5K /rpool
rpool@install 19K - 55.5K -
rpool/ROOT 6.57G 5.05G 18K /rpool/ROOT
rpool/ROOT@install 15K - 18K -
rpool/ROOT/opensolaris 1.05G 5.05G 4.17G legacy
rpool/ROOT/opensolaris-1 5.52G 5.05G 3.63G /tmp/tmpelfMp0
rpool/ROOT/opensolaris-1@static:-:2008-11-22-12:25:21 1.88G - 3.28G -
rpool/ROOT/opensolaris-1/opt 3.82M 5.05G 3.60M /tmp/tmpelfMp0/opt
rpool/ROOT/opensolaris-1/opt@static:-:2008-11-20-23:55:11 0 - 3.60M -
rpool/ROOT/opensolaris-1/opt@static:-:2008-11-21-01:43:22 0 - 3.60M -
rpool/ROOT/opensolaris-1/opt@static:-:2008-11-22-12:25:21 0 - 3.60M -
rpool/export 13.7G 5.05G 19K /export
rpool/export@install 15K - 19K -
rpool/export/home 13.7G 5.05G 13.7G /export/home
rpool/export/home@install 20K - 21K -
Thanks,
wor

Answer 1

The VTOC label inside the Solaris partition appears to think the size of the partition is only 20G. Unfortunately, the Solaris tools don't make it easy to change that number. They only set it when the disk (or partition in this case) is created. So instead of "resizing" the VTOC label, you have to destroy it (just the label, not the data on the disk), the create a new one with the bigger size.
If you're not familiar with Solaris partition and slice setups, it might be faster and safer to just nuke the partition and reinstall/restore.
Otherwise, to record the current slice sizes, you use either 'prtvtoc' or 'format -> partition -> print'. They show the same information in slightly different ways. Both give you where the slices begin and how big they are.
Use 'fdisk' to delete the solaris partition and create a new one. I don't think it'll let you do this if you're booted from the disk. You'll need to boot from alternate media (like CD or something) if that's the case. Once you create a new Solaris partition, it should create a label inside with the right size.
When you run 'prtvtoc' or 'format' after that, it should show the partition size, not the 20G. At that point you use 'format -> partition' to recreate the slices as they existed before. The only difference is that the slice 0 can be extended to go all the way to the end of the (hopefully now larger) partition. If all the slices are in the same spots, then the data in them will be accessible once again. Still, since it's very easy to mess this up, I wouldn't attempt this without having a backup in place.
Darren