Are you seeing this behavior for backups/restores, or just tape-tape operations?
If you are getting this for backups/restore, try using a disk storage pool, if you are not already doing so. The key to success with LTO1 drives is keeping their buffers full and the drive in streaming mode; if you are trying to do directly to tape, you may not be able to "feed" them fast enough to keep them streaming. Once they start working start/stop, performance just falls apart. If you are seeing poor performance tape-tape (reclamation, copy pool backups) and are using a disk pool, try flushing the disk pool out to tape before you begin the tape-tape operation. I think you'll see a significant performance gain. -Lloyd On Thu, 12 Jun 2003 08:11:51 -0500 Colby Morgan <[EMAIL PROTECTED]> wrote: > We in the process of moving to an IBM 3580 external LTO drive for manual > offsite vaulting of primary storage pools. I have read several older > reports on http://msgs.adsm.org about poor performance with TSM, LTO and > small files. We are experiencing the same behavior and I was just > curious if anybody has ran into this lately. We see about 10-15GB/hour > with small files and 42-57GB/hour on larger files. > > We are running TSM 5.1.6.5 on Win2k SP3. The drive is an external IBM > 3580 and is the only device hooked to an Adaptec 2940 SCSI controller. > We are also running v5.0.5.4 of the IBM 3580 drivers. > > I maxed out the following server options (which helped): > MoveBatchSize 1000 > TxnGroupMax 256 > > I also set the drive parameters via ntutil as described in this Redbook > (which also helped): > http://www.redbooks.ibm.com/redpieces/pdfs/sg246268.pdf > > Anybody else ran into these problems? > > > Thanks, > > Colby > -- ----------------------------------------------------------------- Lloyd Dieter - Senior Technology Consultant Registered Linux User 285528 Synergy, Inc. http://www.synergyinc.cc [EMAIL PROTECTED] Main:585-389-1260 fax:585-389-1267 SMS:[EMAIL PROTECTED] -----------------------------------------------------------------
