SLOW=> NW6 & ARC7-9, HP1/8 Autoloader

[seragonzalez]

I have Netware 6, HP surestore C9264CB (Tape autoloader 1/8), Adaptec "aic78u2.ham".
Installed ARC9 with last parches from ARC and Netware 6, throughput in Backup where 14Mb/min, very slow for as expensive hardware. Other customers has NW6 and ARC7 with one DLT tape drive with Adaptec SCSI, and throughput is 140-160 Mb/min.
note:I have to say it's been dificult to discover that was a changer, ¡¡I hope best setup tasks in future release!!
I decide to upgrade to ARC9, but with same results.
After modif some settings in SCSI it runs to 80-90 Mb/min. It is still slow.
I have degraded driver AIC78U2.HAM to older version, but nothing change.

Change scsi controller can be a good idea, but not tested.

Any help? Thanks in advance

 

[Iamit]

Are you using McAfee anti virus? If you are try turning it off during the backup. I had this problem with Netware 5 and Arcserve.

Also, Arcserve has a push agent that seems to speed up the backup.

 

[seragonzalez]

No anti virus in server, and no other significant software loaded aside Netware and its nlm's, that is no NDPS, WEB, GWise, etc...
Push Agent is a good solution, and it can safe 20% time. But in my case, backup ARCserve server not need Agent, and remote servers must be independent from "scsi-ARC-Ntware" errors.
I think theres is a problem with setting in scsi.
Thanks Iamit

 

[seragonzalez]

Problem solved.
The SCSI had Irq 9. I have disabled USB and serial's port, set other irq to scsi. Now, I back to 170Mb/min. UAAAUUU!!!

Notes: The first day, I changed the scsi irq 15 to other, and the result is same slow throughput than irq 15. In some Pc server with Pci solts, the irqs are assigned automaticly. Sometimes it let you assign the irq to pci slot, in other, we have to disable internal devices to free irq. There is Novell tid that explain the problems due to irq 2,9 and 15, but it is not as right in all hardware server. Unfortunately that was one with that problem.
Thanks for all