Have you tested it from the OS? Large file test / small file test / mixed files
Whats your movebatchsize/movesizethresh set to in TSM? The LTO drives work well with bigger files and start to suffer on small ones. I get only aggregate 5-10 GB/hr when I migrate a stgpool with small fileservers/workstations but get 25-35 GB/hr for db servers. I've actually got some I/O problems myself that are begin fixed by plugging in some extra bandwidth, so I can tell you the difference after that. Suad -- On Tue, Jan 29, 2002 at 12:23:56AM +0300, Bill Smoldt wrote: > I've gone back through the list about the slow LTO issues. I haven't found > anything that works in this case. > > TSM V4.2.1.9 > W2K SP2 > 3584 Library at latest firmware > LTO drives at 18N2 firmware latest on devdrvr > Netfinity xSeries 350 > LTO Device driver is 4.0.2.4 - tried 4.0.2.1 and previous versions of > 4.0.1.x > RSM disabled. > > Possible issues: > > Drives and library are connected using the motherboard SCSI 7899 Ultra 160 > chips - one per channel - no internal devices connected. I know about the > Microsoft vs Adaptec supplied driver but can't determine if it applies to > this chipset. > > Cable length to get to the library is long but already installed under the > floor - at least the 12 meter limit and maybe a bit longer (I'm trying to > find out) > > These drives write at about 4G/hour even on 4 GB files. The device drivers > don't stay loaded after a reboot but have to be updated by hand. > > Does anyone have any suggestions to speed these drives up? > > Thanks, > > Bill Smoldt > STORServer, Inc.
