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Subjectrc5 seemed to kill a disk that rc4-mm1 likes. Also some X trouble.
From
2.6.13-rc5 seemed to kill a scsi disk (sdb) for me, where 2.6.13-rc4-mm1
have no problems with the same disk.

Machine: opteron running a x86-64 kernel, with built-in SATA as well as
a symbios scsi controller. Two videocards running independent xservers.
The sdb disk is on the symbios controller.


Using 2.6.13-rc5 I suddenly got this in my logs:

Aug 3 22:06:00 tenkende-august -- MARK --
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:0:0: ABORT operation started.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:0:0: ABORT operation timed-out.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:1:0: ABORT operation started.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:1:0: ABORT operation timed-out.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:0:0: DEVICE RESET operation start
ed.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:0:0: DEVICE RESET operation timed
-out.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:1:0: DEVICE RESET operation start
ed.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:1:0: DEVICE RESET operation timed
-out.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:0:0: BUS RESET operation started.
Aug 3 22:17:15 tenkende-august kernel: sym0: SCSI BUS reset detected.
Aug 3 22:17:15 tenkende-august kernel: sym0: SCSI BUS has been reset.
Aug 3 22:17:15 tenkende-august kernel: sd 0:0:0:0: BUS RESET operation complete
.
Aug 3 22:17:15 tenkende-august kernel: target0:0:1: FAST-40 WIDE SCSI 80.0 MB/
s ST (25 ns, offset 31)
Aug 3 22:17:15 tenkende-august kernel: sdb: Current: sense key: No Sense
Aug 3 22:17:15 tenkende-august kernel: Additional sense: No additional sens
e information
Aug 3 22:17:15 tenkende-august kernel: sdb: Current: sense key: No Sense
Aug 3 22:17:15 tenkende-august kernel: Additional sense: No additional sens
e information

This "no additiomnal sense" then repeats for many screenfulls.
Two sdb partitions got dropped from RAID-1 as they failed, the
md devices got remoutned read-only.

I thought the disk had died - it was my oldest so it'd be reasonable.
Rebooting 2.6.13-rc5 did not bring the disk back - it came up useless again.

I switched back to 2.6.13-rc4-mm1 at this point for another reason,
my X display aquired a nasty tendency to go blank for no reason during work,
something I could fix by changing resolution baqck and forth. X also tended to get
stuck for a minute now and then - a problem I haven't seen since early 2.6.

These troubles disappeared by going back to 2.6.13-rc4-mm1. Even more interesting,
the sdb disk seems fine again. There were no errors as I copied
all data to another disk, and no errors when I ran a badblocks write-test
(the nondestructive write test) on it.

The two kernels have some config differences. The 2.6.13-rc5 kernel
has ACPI+CPUFREQ configured, that the 2.6.13-rc4-mm1 doesn't have.

An lspci, in case hw driver trouble is suspected:
0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8385 [K8T800 AGP] Host Bridge (rev
01)
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI bridge [K8T800 South]
0000:00:05.0 SCSI storage controller: LSI Logic / Symbios Logic 53c895 (rev 01)
0000:00:06.0 Multimedia audio controller: Trident Microsystems 4DWave NX (rev 02)
0000:00:08.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 SE]
(rev 01)
0000:00:08.1 Display controller: ATI Technologies Inc RV280 [Radeon 9200 SE]
(Secondary) (rev 01)
0000:00:0b.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5705 Gigabit
Ethernet (rev 03)
0000:00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID
Controller (rev 80)
0000:00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C
PIPC Bus Master IDE (rev 06)
0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller
(rev 81)
0000:00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [K8T800 South]
0000:00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237
AC97 Audio Controller (rev 60)
0000:00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
0000:00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
0000:00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
0000:00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
0000:01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G550 AGP (rev 01)

I can run more tests, but don't know what would be the most interesting.
rc5 without powermanagement? rc4-mm1 with it? Or the newest git kernel?
Or is this the effect of some known problem?

Helge Hafting
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