Mike, The problem you are running into has to do with the fact that Veritas does not presently support DAR. DAR is defined as Direct Access Restore, and it speeds restores by directly accessing the file to be restored on the correct tape, without having to load and stream through each tape in the backup set. NetApp now supports this capability in DatONTAP 6.0 and above, and I believe Veritas is planning on supporting this in their 4.5 release of NetBackup.

-----Original Message----- From: MikeBall@datalink.com [mailto:MikeBall@datalink.com] Sent: Tuesday, May 08, 2001 5:43 AM To: owner-toasters@mathworks.com Cc: toasters@mathworks.com Subject: NDMP, Veritas and Netapp---slow restores?

Below is our environment ------------------------- Veritas DataCenter 3.4GA Patch J0850482 on Sun e250 2 400M procs and 512M ram ATL3000 Tape Library with DLT-7000 drives NetApp 760 Filer running OnTap 5.3.6R1 2 tape drives directly attached to the onboard SCSI port on Netapp Netapp is attached to LAN by gigabit ethernet

Scenario ------------ We are backing up the nightly snapshots. We have a Netapp backup class. I have had to give each class the NEW_STREAM directive in order to get multiple jobs started, but unlike the other Veritas jobs, they line up in a queue and execute one at a time. Restores are quite slow, and while I can pick individual files out of a catalog, neither Veritas nor OnTap has any idea where they are on the tape. I have used the OnTap utilities to check status on the drive and seen it searching serially thru the tape for the file. The Veritas messages are very sparse. The first time I tried a restore, I had a 168Gb volume in one stream. It eventually took 5.5 hours to restore, and that was after I killed the job because I had no feedback from Veritas, having to reset the tape drives because they were downed by the kill. By splitting up the streams, I got this down to about an hour, but it is still slow enough to be an issue.

Does anyone have any idea what I may be doing wrong or is this just a issue with Veritas NDMP? Does anyone no if Veritas is planning on fixing this slow restore performance via NDMP? Will upgrading to Data Ontap 6.02 help any?

Thank you for your help, Mike