Solaris

I mean cXtXdX. You don't have to specify the "sX" part with ZFS (and it is not recommended as you already have whole disk in cXtXdX format in your pool). Extending ZFS pool can be done online. Nothing or no one will be taken offline. Both filesystems (/export/sybase/compers, /export/sybase/dumps) will have the additional space available to them immediately after adding new disk to the pool.

Thanks you once again.
I executed the zpool add command, and I got this in return:

# zpool add sybdump c5t113d0
invalid vdev specification
use '-f' to override the following errors:
/dev/dsk/c5t113d0s0 is part of active ZFS pool sybdump. Please see zpool(1M)

I take it I needed to add the ' -f ' option somewhere?

No. c5t113d0 is already in your pool. You can't add it again. After reading your post again I think I now get what you did. Did you expand the LUN on the storage by 100GB? The c5t113d0?

Yes, I did. The format command shows the disk at 600GB
c5t113d0 <LEFTHAND-iSCSIDisk-9500-600.00GB> ( the volume size was 500GB. I added 100GB to it for our Sybase admin)
but if I do df -k, it only shows 488GB.....

Then you should run:

Code:

zpool online -e sybdump c5t113d0

Got this:

# zpool online -e sybdump c5t113d0
invalid option 'e'
usage:
online <pool> <device> ...

Hmmm. You seem to be running old update of Solaris 10. Post output of:

Code:

cat /etc/release
uname -a
zpool upgrade
zfs upgrade