8.0-RC1 amd64 - filesystem on scsi disk related memory corruption w/ gte 4GB ram

[Scott Long]

On Oct 20, 2009, at 5:51 PM, Mike Watters wrote:

> Running 8.0-RC1 on an amd64 workstation, I have run into what  
> appears to
> be a memory corruption issue when doing (UFS2) filesystem I/O on an
> attached SCSI disk when more than 4GB of RAM is installed, or when 4GB
> is installed and "memory hole remapping" is enabled in the BIOS.
>
> The SCSI card is an LSI20160 (sym(4), PCI U160).  The SCSI disk is a
> Seagate ST373455LW (U320).  The current motherboard is an ASUS M3A76- 
> CM
> (AMI BIOS, AM2+ socket).  I have a boot -v dmesg (34kb) available  
> from a
> livefs cd boot with 8GB installed and memory hole remapping turned on
> (case 4 result).  The source used to build the CD was cvsup'ed a  
> week or
> two ago.

The sym driver has been having issues on-and-off for years with 64bit  
memory configurations.  If at all possible, I'd recommend replacing  
your hardware; fixing the driver has proven to be hard given the  
limited resources available and the age of the hardware.

Scott