Bill,

right now I cannot help you with the LTO but for the adapter drivers of
integrated chipsets Adaptec itself recommends to check for OEM vendor
drivers. In your case for xSeries this means IBM. Visit
<http://www.pc.ibm.com/support>, go to the page for your xSeries and get
IBM optimised drivers for the integrated chipset. Usualy it does not differ
too much from Adaptec drivers but I had disk problems in the past on
Netfinity 5000 and they dismissed as a morning fog when I replaced MS
drivers with IBM supplied ones.

Zlatko Krastev
IT Consultant





Bill Smoldt <smoldt AT STORSOL DOT COM> on 28.01.2002 23:23:56
Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
To:     ADSM-L AT VM.MARIST DOT EDU
cc:

Subject:        Slow LTO drives

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.