SCSI Drives / Large Memory Kernel Panic

[Steven Wagner]

Technomage-hawke wrote:
> this may be a linux specific problem (I cannot be sure unless the results can 
> be duplicated with other linux distros). 
>
> perhaps trying openBSD or OpenSolaris would work (fully supported for that 
> much ram and that hardware).
>   
I've tried FreeBSD (and several other Linux distros) and it didn't even
see the drives. I'm pretty sure that the problem is the card, but it's
still odd that it works fine with 2 GB RAM. Also, CentOS worked fine
with the SATA drive and all 4 GB RAM.
>
>
> TMH
>
> On Sunday 15 July 2007 21:57, Steven Wagner wrote:
>   
>> I'm trying to upgrade a server from 2 GB of registered ECC RAM to 4 GB.
>> The extra RAM was specifically purchased from the manufacturer to be
>> identical to the existing modules. After installing the extra RAM the
>> server panic'ed so we tried installing some other kernels, even enabling
>> huge mem (64 bit) to no avail.
>>
>> I rebuilt the server with CentOS 4.4 Server CD with all 4 GB of RAM
>> installed. It panics when I try to boot with the full 4 GB installed,
>> but boots fine when I remove 2 GB.
>>
>> The panic seems to happen when the SCSI card driver, aic7xxx, tries to
>> enable the disc drives. The console error says:
>>
>> aic7xxx_dump returns 0x2002
>> Device offlined
>>
>> then a slew of SCSI I/O errors, the exec of init failed, then the panic.
>> It seems weird that the card and the drives work fine with the 2 GB of
>> RAM...Anybody have any thoughts?
>>
>> TIA,
>>
>> Steve
>>
>> BTW, I installed CentOS 4.4 on this machine to a SATA drive and it sees
>> all 4 GBs and works fine.
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