I hope this thread catches someone's attention. I've reviewed the root pool
recovery guide as posted. It presupposes a certain level of network support,
for backup and restore, that many opensolaris users may not have.
For an administrator who is working in the context of a data center or a
laboratory, where there are multiple systems, including some kind of network
attached storage, it works fine. However, my understanding was that
opensolaris was attempting to broaden its user-base by adopting capabilities
from the many flavors of linux, and (dare I say it?) even Windows (detailed
CIFS integration).
The desire to make in-roads into the alternative workstation OS segment implies
that Sun and OpenSolaris anticipate more individual, desktop and laptop-based
users vice the Solaris previous sole focus on the server segment. But the
desktop and laptop-based crowd often do not have and NFS or other storage
server on their network. Many are simply home-users who want an alternative to
Microsoft or who hope to enhance their education in commercial versions of UNIX
via home-implementation. While they likely won't have network storage
available, most such users do have resources such as additional hard drives,
USB drives, eSATA drives, or USB solid state devices available.
For their use I threw together a root pool recovery procedure that uses an
additional disk attached to the machine requiring backup/recovery. In
developing this procedure the additional disk was attached to a free IDE/SATA
port on the motherboard. However, I believe it will work equally well for an
attached USB-disk or solid state memory device.
PROCEDURE FOLLOWS:
__________________________________________________________
This instruction assumes that in the system bios is capable of choosing a
specific boot device and that the system is X86/64 rather than SPARC.
It also assumes that there are at least three disk devices available in the
system:
1) A rootpool from which to take a backup. In this instruction this disk is
c0d1s0.
2) An alternate disk which should become the new rootpool. In this instruction
this disk is c0d0s0. And to choose this method rather than mirroring the
original rootpool implies the the new rootpool disk may be smaller than the old.
3) A 'storage' zfs pool that is not the rootpool, nor the new rootpool, but can
serve as a storage cache for the system backup in place of a shared network
drive, NFS or other.
These tasks were accomplished all from the first CD in a Solaris 10
installation set because all efforts to send the recursive snapshot of the
rootpool while the system was in operation resulted in the system hanging.
Your mileage may vary. However, I believe these instructions to be a safe
backup method for average users who work primarily with a single system, and
who may not have extensive network storage or other system support.
These instructions were developed on Solaris 10 U6, October 2008, for an
X86-X64 system using an AMD64 processor.
_____________________________________________________________________________________
1. While booted interactively on your system, as root, perform the following:
-Create a zfs storage pool to contain your zfs snapshots (if you don't
already have one).
EXAMPLE:
# zfs create storage/snaps
-Create a recursive zfs snapshot of your rootpool using the command,
"zfs snapshot -r <rootpoolname>@<today'sdate:DDMMYYYY>
EXAMPLE:
# zfs snapshot -r rootp...@16012009
-Shutdown the system
EXAMPLE:
# init 0
2. Insert or connect the new rootpool disk.
3. Insert the Solaris bootable CD or DVD.
4. boot cdrom
5. Press 3 when prompted for interactive install.
6. Press F_2 when prompted.
7. Press 'Enter' when prompted.
8. When interactive shell has started place mouse cursor in window as indicated
and press'Enter'.
9. When prompted, place mouse cursor in window, per screen instructions, press
'0', then press 'Enter'.
10. When interactive install console window appears, minimize it.
11. Right click on the desktop and select 'Programs' and the sub-menu
'Terminal...'
All further instructions should be completed in the terminal.
_____________________________________________________________________________________
# zpool import
pool: storage
id: 2698595696121940384
state: ONLINE
status: The pool was last accessed by another system.
action: The pool can be imported using its name or numeric identifier and
the '-f' flag.
see: http://www.sun.com/msg/ZFS-8000-EY
config:
storage ONLINE
mirror ONLINE
c2d0 ONLINE
c3d0 ONLINE
pool: rootpool
id: 8060131098876360047
state: ONLINE
status: The pool was last accessed by another system.
action: The pool can be imported using its name or numeric identifier and
the '-f' flag.
see: http://www.sun.com/msg/ZFS-8000-EY
config:
rootpool ONLINE
c0d1s0 ONLINE
# zpool import -f rootpool
cannot mount '/rootpool': failed to create mountpoint
# zpool import -f storage
cannot mount '/storage': failed to create mountpoint
cannot mount '/storage/snaps': failed to create mountpoint
# zfs set mountpoint=/mnt storage/snaps
# zfs mount storage/snaps
# ls /mnt
# ls -la /mnt
total 516
drwxr-xr-x 2 root root 4 Jan 16 2009 .
drwxr-xr-x 19 root root 512 Oct 27 10:04 ..
# zfs send -v rootp...@16012009 > /mnt/rootpool.16012009
# zfs send -Rv rootpool/ROOT/s10x_u6wos_...@16012009 > /mnt/s10x_u6wos_07b.16
012009
sending from @ to rootpool/ROOT/s10x_u6wos_...@16012009
# zpool export rootpool
# zpool create -f -o failmode=continue -R /a -m legacy -o cachefile=/etc/zfs/
zpool.cache rootpool c0d0s0
# ls /mnt
rootpool.16012009 s10x_u6wos_07b.16012009
# cat /mnt/rootpool.16012009 | zfs receive -Fd rootpool
# cat /mnt/s10x_u6wos_07b.16012009 | zfs receive -Fd rootpool
# zfs list
NAME USED AVAIL REFER
MOUNTPOINT
rootpool 4.92G 31.5G 37.5K legacy
rootp...@16012009 0 - 37.5K -
rootpool/ROOT 4.92G 31.5G 18K legacy
rootpool/ROOT/s10x_u6wos_07b 4.92G 31.5G 4.92G /a
rootpool/ROOT/s10x_u6wos_...@16012009 61.5K - 4.92G -
storage 84.0G 832G 19K /storage
storage/snaps 5.09G 832G 5.09G /mnt
# zpool set bootfs=rootpool/ROOT/s10x_u6wos_07b rootpool
# zfs create -V 2G rootpool/dump
# zfs create -V 2G -b 4k rootpool/swap
# installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c0d0s0
# zpool export rootpool
# zfs unmount storage/snaps
# zfs set mountpoint=/storage/snaps storage/snaps
# zpool export storage
# init 6
_____________________________________________________________________
END PROCEDURE
I hope someone finds this useful.
V/R
Gordon Johnson
--
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