I don't have enough info to say this for sure, but my first suspicion is that your filesystem has gotten spread out across a lot of tapes. So it mounts a tape, spins up to the right location, and gets blazing speed. Then it needs to mount the next tape and spin up to the location of the next group of files, which is when speed plummets. Try doing a MOVE NODEDATA NODENAME before you do the restore, which will put all the files back on as few tapes as possible. It's not practical to do this before all restores, but it will tell you if tape sprawl is your problem. If it is, and if this node is important enough, you might want to look into collocating that node (or group of nodes).
>>> [EMAIL PROTECTED] 12/21/2005 1:47:22 PM >>> TSM server 5.3.1 on 2K server. Libraries are one Overland Neo 4100 with 2 LTO2 drives, and an Overland Neo 4100 with 2 LTO3 drives. I'm restoring a windows client workspace. Client is running TSM backup client version 5.3.0. Originally, the client was 5.1.9.0, and it was with this version that we first created the backup of the workspace drive on the client. Now I'm trying to restore that workspace filespace to the new system. The restore started fine, 30MB+/sec in our GigE network. But at times the restore speed slows to a halt, and restore speeds are less than 1MB/sec, sometimes only 200-300K/sec. Then a little later it will start to go 30MB/sec again. It is switching back and forth, sometimes in the middle of a file! The server is currently trying to restore an 86MB file, but it's doing so only at 300K/sec. Being that the workspace is 244GB, this is unacceptable speed. The client data is on the LTO2 library. There is absolutely nothing unusal in the logs that would indicate any kind of problem on the drive or the tape. No errors are being reported whatsoever. The client filespace is NOT compressed on the client side. Compression happens on the drives (HP). The client hardware is excellent, dual AMD opteron, with 3G SATA drives in striped RAID, XP Pro. Plus the client at times restores at 30+MB/sec so I know it can do it. Network on the client is not busy, and the network switch is not saturated, in fact there is very little network activity. It just seems like the server decides to go fast at times and then sometimes very slow. But with nothing in the logs I don't know what to troubleshoot. Any idea where to start troubleshooting this problem? Anyone seen this type of behavior before? Thanks! Alex Confidentiality Notice follows: The information in this message (and the documents attached to it, if any) is confidential and may be legally privileged. It is intended solely for the addressee. Access to this message by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken, or omitted to be taken in reliance on it is prohibited and may be unlawful. If you have received this message in error, please delete all electronic copies of this message (and the documents attached to it, if any), destroy any hard copies you may have created and notify me immediately by replying to this email. Thank you.