Hello,
You can try sharing the same lun\qtree\vol once RW for the writes and 
second time Read only to the backup server either NFS or CIFS  and you can 
accomplish that.I am not sure why you want to do that any way, since most 
of the backup overhead is with the filer, that is not going to change if 
you backup from a different  server ?
some folks use snapmirror or flexclone  and do their backup on secondary 
NAS system to reduce impact on primary filer.
Thanks



tkimball <networker-forum AT BACKUPCENTRAL DOT COM> 
Sent by: EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
12/03/2008 05:08 AM
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Subject
NAS, iSCSI, and non-NDMP backup






Fazil Saiyed wrote:
> Hello,
> Before you go down the path of backing up NAS without NDMP Licences, you 
should consider what are you putting at risk, how large is your data store 
going to be, what will be the recovery objectives and will it be reliable 
backups? what is your backup window & will you be able to meet it ? You 
may allest want to consider snapshots for onsite recovery along with all 
your backup\recover scenarios & test them.
> HTH
> 


Most of this I have already, as the NAS is eventually replacing both a 
MSCS cluster (sharing out a single 500 gig disk - which is serving four 
different uses unfortunately), and a Veritas cluster (for the UNIX-side 
mounts, about 90 gig split over several shared partitions).  There is also 
some overflow onto one other server (PC side of course) to the tune of 
about 200 gig.

The backup window is currently 30 hours on the Full (which is what the 
current MSCS cluster is doing, *barely*, and I hope to fix that just by 
splitting the monolithic 500 gig share into several purpose-built shares).

'Snaps are a hard sell here, unless you can recover an individual file 
from within the snap.

Still don't have an answer to my original question though - can you mount 
an iSCSI LUN from the NAS on two different Sun hosts (the second one being 
for backup only)?  If that will not be possible for backup, then we'll 
either do all NFS or go and get the license.

--TSK

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