12MB/sec isn't really that bad for LTO-1 drives. 6.4.3 (I think they are
up to P11) has some fixes to the slow start of dumps, but probably isn't
your problem. You could switch to backing up by quota tree which should
improve things (just remove remove /vol/vol0 from client setup and add
/vol/vol0/qtree1, /vol/vol0/qtree2, etc.). Of course, this runs the risk
of someone creating a new quota tree and it not getting added to the
backup. This will increase your parallelism depending on the number and
depth of your quota trees. It will also make disaster recovery faster
than volume backup. The risk would need to be evaluated though.

----
Matthew Huff           | One Manhattanville Rd
Director of Operations | Purchase, NY 10577
OTA LLC                | Phone: 914-460-4039 
http://www.otaotr.com  | Fax:   914-460-4139    

> -----Original Message-----
> From: Krishnan, Ramamurthy (Temp) 
> [mailto:Ramamurthy.Krishnan AT KPMG.CO DOT UK] 
> Sent: Thursday, March 11, 2004 9:22 AM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: Re: [Networker] Slow filer backups
> 
> 
> Matt
> 
> - They are LTO-1 drives
> - OnTap version is 6.4.2 P9
> - Backing up volumes.
> 
> thanks
> 
> - Krishnan
> 
> -----Original Message-----
> From: Matthew Huff [mailto:mhuff AT ox DOT com]
> Sent: 11 March 2004 14:11
> To: Legato NetWorker discussion; Krishnan, Ramamurthy (Temp)
> Subject: RE: [Networker] Slow filer backups
> 
> 
> Are those LTO-1 or LTO-2 drives? What OnTap version are you 
> running? Are you backing up by volume or quota-tree?
> 
> ----
> Matthew Huff           | One Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA LLC                | Phone: 914-460-4039 
> http://www.otaotr.com  | Fax:   914-460-4139    
> 
> > -----Original Message-----
> > From: Krishnan, Ramamurthy (Temp)
> > [mailto:Ramamurthy.Krishnan AT KPMG.CO DOT UK] 
> > Sent: Thursday, March 11, 2004 8:49 AM
> > To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> > Subject: [Networker] Slow filer backups
> > 
> > 
> > Hi all
> > 
> > We have a set of NetApp 840 Filers that are connected to a
> > ATL P7K through a Gigabit switch.  NetWorker 6.1.3 runs on 
> > Solaris 8.  The total backup size on an avg. is ~2TB a day.  
> > The backups do run but are too slow.  All the 12 LTO drives 
> > of the library won't exceed 12Mb/s speed.  The lowest being 
> 90Kb/s.  
> > 
> > Is it a normal show?  Is there some way by which I can
> > improve the transfer speed, so backups finish faster?  Any 
> > help is appreciated.
> > 
> > TIA
> > 
> > - Krishnan
> > 
> > 
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