Have a look at your dsmaccnt.log, in particular the MediaWait and CommWait columns. If you see large figures in both then this suggests to me that the network connection is not feeding the TSM server fast enough to support streaming. You must either increase your network throughput or backup to disk and migrate to tape. Some drives do compression, so native streaming rate might not be equal to real world streaming rate (I see between 15 MB/sec and 48 MB/sec for a 3590 fibre attached drive.) You might try compressing on the client first?
Good luck, Paul. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Coats, Jack Sent: Wednesday 26 January 2005 17:16 To: ADSM-L@VM.MARIST.EDU Subject: How to get a tape drive to stream? But does someone have a pointer to some 'tips & tricks' or FAQ to help me get these LTO tape drives streaming with TSM on Windows 2000? The drives seem to be doing about 3MB/sec per drive, no matter what is going on in the server. This is about the right speed for stop/start programmed I/O processing. My config is TSM 4.3 on Windows 2K server (2 1.2G Xenon, 1G RAM) My SCSI attached LTO-1 drives are on Adaptec controllers (IBM branded), with two tape drives per controller. I have 3 identical SCSI controllers with two drives each (one also has my 3583 library on it). Disks (6 72G 10K drives, in two partitions) are attached to one RAID card, and are RAID 5. I can't get just running a single tape drive streaming, with nothing going on in my system (db backup only, no backups, no reclamation, no expiration, etc) Any advice/suggestions are appreciated. ... ... Desperate in Houston ... JC Any e-mail message from the European Central Bank (ECB) is sent in good faith but shall neither be binding nor construed as constituting a commitment by the ECB except where provided for in a written agreement. This e-mail is intended only for the use of the recipient(s) named above. Any unauthorised disclosure, use or dissemination, either in whole or in part, is prohibited. If you have received this e-mail in error, please notify the sender immediately via e-mail and delete this e-mail from your system.
