Adaptec 39160, LTO2 SCSI issue

[Roberto Torresani_1]

Hi all,
I have 4 LTO2 drive, connected two by two at the channel of a 39160D controller (ML730 G3)
When a write on a drive on ch A at max speed and meantime I read from another drive on ch B, I see the writing drive fail with a "Data phase error", while the reading drive still works.

I also checked all the connectors.

I have a RHEL4 OS (Adaptec module version 6.2.36 but I have also tried the version 6.3.11 from HP site without luck).

Any idea please?

Thanks,
Roberto

[Rajanikant]

Hi,

What is the backup application you are using?

Regards

[Roberto Torresani_1]

I think the problem is not related to the backup software.
I can reproduce the errors with simple "dd".
I suspect that it could be the controller...ot the driver (kernel module) I'm using...

[Roberto Torresani_1]

I'v done more test.
Everytime I read from one channel and write to the other one, I get "Data phase error" on the writing one.

If I test the read/write streaming on the tape drives attached on a single channel, I get no error...

I'm quite confused...

Roberto

[Roberto Torresani_1]

I tested more deeply.

Whenever I write on a tape drive on one channel and read from another drive on the other scsi channel I got 'Data phase error'.

If I use only one scsi channel, everything works fine.

I'm quite confused...

[Curtis Ballard]

Check the firmware on your HBA. If you really are connected to different channels this sounds like something is wrong with the HBA. There should not be any cross effects.