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Hi George
I understand RDM's cannot be backed up, thats not the actual
issue here that I am seeing.
Here is a given scenario and the situation I am
seeing:
1 x VM with C: Drive Windows OS and E Drive which is an RDM.
The VM has NetBackup Client software installed.
I have a Flashbackup-windows policy for this VM and use all
local drives. The backup of the VMDK works great, and I am NOT expecting to see
the RDM present, so I know that will not be in the BAR Tool.
Here is the problem I am seeing:-
If the machine is recovered from NetBackup as a VMware
Restored machine, it restores great, but there is NO E: Drive present. I
understand RDM's cannot be backed up, but what I am trying to say is why is the
E: drive missing after the restore? Does the VM configuration itself know that
it has an RDM and try to reattach it if it can be seen?
If I have over 500 VM's and most have an E: Drive as an RDM
Disk, then recovery of a VM is going to be pretty hard if the VM config doesnt
know about the RDM.
Does this help explain the problem I am potentially seeing?
Its just that I thought NetBackup protected the entire VM, including the
configuration of the VM, even if it had an RDM Mapped (which I know cannot be
backed up). If it knows it should have an RDM Mapped, then why does it not show
it after the recovery of the VM?
Simon
Hi
Simon.
NetBackup
for VMware does not backup devices that are accessed via Raw Device Mapping
(RDM). Most RDM-based storage is configured in VMware’s “Physical
Compatibility Mode”. In this mode there is no way to create a snapshot of
an RDM device.
We
suggest using a client to backup storage that is configured this way. If
the Enterprise Client is used, advanced backup methods (e.g. off-host backups of
mirrored storage) can be employed with VM backups and
RDM’s.
-George
Winter
Symantec
Corporation
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Simon
Weaver
Sent: Thursday, March 29, 2012 8:19 AM
To:
VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] Restore of VM
that has RDM's - missing after restore
I may have missed
something here, but wanted to check...
NBU 7.0.1 and doing
full VM Backups, most of which have RDM's
I ran a test today on
a VM Guest that has a single 10GB RDM. Performed the VMware Backups (Using the
windows-flashbackup policy) and all fine.
Using the BAR Tool, I
see the VM Guest which is fine and I am NOT expecting the RDM to be present, so
I fully understand this!
But when I restore
the VM (Overwrite the existing VM, use the same UUID, power on VM), this works
great but the RDM that was mapped is no longer
mapped.
Now, I thought that
by capturing the VM Guest, it meant that any RDM that was assigned would get
re-attached once the VM guest was restored.
Or have I missed the
point?
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