zfs discuss - Nov 2008 - grub prompt after aborted ufs to zfs live upgrade

I attempted a live upgrade of snv_100 ufs laptop over the weekend to zfs.
It failed a couple of times complaining about not having enough space.
I decided to put the zfs upgrade on the back burner and deleted the
failed BE - naturally no luactivate was done at any time.
I didn''t delete the the BE''s zfs pool.

I placed into suspend and started up fine this morning, continued to
work until now and decided to reboot the system.

I now only get the  grub prompt.
If I do a rootnoverify, from the grub prompt, I get:
(hd0,2,e): Filesystem type is zfs, partition type 0x82

How do I get my ufs snv_100 system back up and running?

Thanks.

Since the above post, I downloaded Super Grub and managed to recover a trashed
(grub) FC8 installation that was lost when nevada was installed some time back.
This now has as well as the FC 8 prompt  in the Grub menu:

title Solaris - BE1
        rootnoverify (hd0,2,a)
        chainloader +1
        makeactive

title Solaris - BE2
        rootnoverify (hd0,2,e)
        chainloader +1
        makeactive

Selecting either of the Solaris choices receives:
Error13: Invalid or unsupported executable format

Back with Super Grub, selecting Partitions presents, amongst the other
partitions the two 15GB BE''s I was using for live upgrade, namely:
N	IDE	SCSI	GRUB		HURD	TYPE	SIZE	OS
.
. 	 
3	hda3	sda3	(hd0,2,a)	hd0s3	ufs	15GB
.
.
3	hda3	sda3	(hd0,2,e)	hd0s3	swap	15GB


dropping back to a  grub prompt and entering root returns:

root (hd0,2,e):Filesystem type is zfs, partition type 0x82

As I mentioned in my earlier post, the zfs BE had been deleted, but not the
zpool.

Any of the other Super Grub options to get the solaris running ends in failure.

Thanks for your time.
-- 
This message posted from opensolaris.org

Sounds like you''ve either trashed your GRUB config or it can''t
find/access it.

Try manually booting your ufs partition by using a GRUB entry like this:

---
findroot (hd0,2,a)
kernel$ /platform/i86pc/kernel/$ISADIR/unix
module$ /platform/i86pc/$ISADIR/boot_archive
---

You may need to try a different "root" line, so try:

---
root (hd0,2,a)
kernel$ /platform/i86pc/kernel/$ISADIR/unix
module$ /platform/i86pc/$ISADIR/boot_archive
---

... if the first attempt doesn''t work.
-- 
This message posted from opensolaris.org

Still no luck :-(
I installed snv_100 on a new disk, mounted the old disk and copied the home
directories etc.
and now at least I have a system that works, if somewhat stunted cf the old
system.

It would be good if the old disk could be brought back to its former glory...
-- 
This message posted from opensolaris.org

Thanks to Iain Curtain.
1. boot into single user mode from dvd, then su.

2. mount the rootpool as r/w on /a when prompted

3. run: installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c0d0s0

4. reboot
-- 
This message posted from opensolaris.org