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Bug#258082: kernel: Failure to read partition table with advansys scsi



Package: kernel
Severity: normal


Stock debian kernel images 2.4.26 and 2.6 up to and including 2.6.5 
work fine, happily read partition table containing root fs on SCSI disk.

Kernel images 2.6.6-1-k7 and 2.6.7-1-k7 fail to read partition table from disk,
though do seem to detect controller and disk. Unsurprisingly, eventual
kernel panic when root fails to mount.

"/dev/scsi/host0/bus0/target0/lun0: unknown partition table"

Not much more to go on than that...

Maybe related (same symptoms, similar hardware... different kernel tree):
http://marc.theaimsgroup.com/?l=linux-kernel&m=108702899205509&w=2

There are a few changes between debian's kernel-source 2.6.5 advansys.c and
2.6.6+ advansys.c, though I haven't managed to prove those changes are 
responsible, >2.6.5  is working fine on other boxes, so I believe
it to be advansys-specific.  

Report might be more appropriate to LKML or linux-scsi, but since I'm using
debian's kernel, reported here first for referral at maintainer's discretion.

Hardware:
AMD Athlon CPU
Advansys PCI SCSI Controller ABP940-U2W
Harddisk: SEAGATE  Model: ST336607LW

lspci:
Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333 AGP]
Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 50)
USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 50)
USB Controller: VIA Technologies, Inc. USB 2.0 (rev 51)
VGA compatible controller: S3 Inc. 86c764/765 [Trio32/64/64V+] (rev 54)
Ethernet controller: Intel Corp. 82540EM Gigabit Ethernet Controller (rev 02)
SCSI storage controller: Advanced System Products, Inc ABP940-U2W
ISA bridge: VIA Technologies, Inc. VT8233A ISA Bridge
IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 23)
USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 23)


-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.5-1-k7
Locale: LANG=C, LC_CTYPE=C




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