Hello

I've got Fujitsu-Siemens Econel 200 machine (2 x Xeon 3.2GHz, 2GB RAM, 2x SCSI 75GB Seagate Drives). The problem is that these drives are connected to one channel - i cannot change it since this is my employer's machine. Second channel does not have any devices. BIOS copes with it easily - no devices on second bus - it goes further. But linux (Red Hat AS 3.0) module aic79xx.o (i suppose it's this module) tries to search devices on second channel (from id 0 to id 15) but fails as soon as there is nothing to find there! I cannot disable second channel nor from BIOS neither from SCIC(Tm) utility... This search is about 5 minutes long - with no results - nothing to find since all 2 drives seat on 1st bus. Can anyone help me? Anyone familiar with ths problem?

Thanks
Tom

I don't know if the following will be applicable to your situation or not, but assuming I understand the question correctly, the problem is that during boot the system continues to try to search for devices that you know are not present on the second channel. I was having a similar problem, where the system boot process was significantly slowed by that kind of useless detection. I was able to avoid that entire situation by adding the "append hxy=none" parameter to lilo.conf. (The values for x and y will depend on your specific machine - for me it was "hga=none")

As I've said the above may not be applicable to your situation however I'll throw it out there as a possibility. Check the man pages for more info about the append options in lilo. Good luck with it -- J.W.

Yes this is exactly this situation - i want to force kernel or module not to search devices on second channel since there is nothing there. THANKS FOR INTEREST. I'll try it right now! What is hxy? SCSI channel device?

BIG THANKS!

P.S. on what machine you had this prolems?

The problem is I WANT TO force kernel/module NOT to initiate/search on second channel - IS THS POSSIBLE? Scsi Adapter is Adaptec AIC 7902W running on aic79xx.o module. Is is any possibility to do this? On first channel ID1 and ID2 are for two seagate scsi drives ID7 id for adaptec itself. On second channel only ID7 is for adaptec itself.

ANY HELP?

I'm fighting with FUJITSU-SIEMENS ECONEL 200 for 3 days. Ethernet doesn't work (1Gigabit Broadcom TG3)..

To be more exact:

after scsi drives are found i've got almost 5 minutes of this:

......................
..................................

scsi1:0:10:0 Attepmting to abort smd f7f8a800 0x0 0x0 0x0 0x0 0x0
scsi1:0:10:0 Comamnd aleready completed
....
....
scsi: device set offline - not ready or command retry failed after bus reset: host1 channel 0 id 10 lun 0

and it goes for 16 times....

on first host (not channel???) things go OK. Found two drives and goes to second host (not channe??)

help
thanks

Now after compiling 2.6.11.7 kernel module aic79xx.ko tries to cope with SCSI but hangs after accessing second host.

What now?

Any ideas?

THX in advance.

I also have problems with those darn Adaptec cards (my chipset is a 7902B).

I was thinking there may be a workaround for you. In stead of disabling channel B, you could enable host raid on this channel via your BIOS? Your SCSI card then will be detected as a RAID controller.

Sincerely
Guy

Hello

I found solution

add to kernel loading paremeters 'acpi=off pci=noacpi noapic pci=biosiorq'

helped for me secind channel is not being scanned anymore , hope helps You too

greets

Tom

Congrats pc131 on solving the problem and many thanks for posting back with the solution that worked for you; it may be very helpful to future readers who have the same question -- J.W.