Jochen,
If you needed to restore the LUN, you would use a "Single File Snap
Restore" from the filer. Check the guide under "Snap Restore" You want
to use the "-f" flag.
This will restore ONLY the LUN out of the snapshot, not revert the
entire volume.
Hope this helps!
-Charles
-----Original Message-----
From: Willeke, Jochen [mailto:Jochen.Willeke@wincor-nixdorf.com]
Sent: Thursday, May 11, 2006 9:58 AM
To: Ledbetter, Charles; toasters(a)mathworks.com
Subject: RE: Snapshots of LUN without snapdrive
Hi,
thanks a lot for your reply, i think this is the only possibility we
have. But there is one question left, how can i access this
"snapshot-LUN" in case i need to restore a special file and not the
whole LUN.
I thought of copying data with ndmpcopy into another volume, add the
copied LUN to the igroup, connect that copied LUN with the target and
access the requested file. Or is there an easier way??
Best Regards and thanks a lot so far
Jochen
-----Original Message-----
From: Ledbetter, Charles [mailto:Charles.Ledbetter@netapp.com]
Sent: Thursday, May 11, 2006 3:46 PM
To: Willeke, Jochen; toasters(a)mathworks.com
Subject: RE: Snapshots of LUN without snapdrive
Jochen,
Creating a snapshot of a Boot LUN is a bit tricky. Even with Snapdrive,
we cannot positively guarantee the consistency of the Boot LUN.
Microsoft doesn't give us an API call into the OS to completely quiesce
the I/O before creating the snapshot. Even with Snapdrive, you will see
a popup indicating this fact before creating the snapshot.
We've completed a LOT of testing and determined that restoring a
snapshot of a boot LUN created this way is roughly equivalent to
rebooting the Windows host by pressing the reset button on the front
while the OS is up and running.
The best way to create a snapshot of the boot LUN is to shut down the
host OS, telnet to the filer and create a snapshot from there. That
way, all I/O from the host is shut down and you'll get a clean,
consistent snapshot.
Hope this helps...
Charles
-----Original Message-----
From: Willeke, Jochen [mailto:Jochen.Willeke@wincor-nixdorf.com]
Sent: Thursday, May 11, 2006 8:17 AM
To: toasters(a)mathworks.com
Subject: Snapshots of LUN without snapdrive
Hi Toasters,
we have a windows server which boots from a LUN on a filer. The server
has a hardware ISCSI controller which connects the LUN with the server
and presents it as a bootable device.
I now wonder if there is a possibility of making snapshots of the volume
containig the LUN's. And if yes i do not know how to access this LUN
without the help of snapdrive.
Anybody a good idea or is it impossible?
Regards
Jochen