I have installed SME5.6 on a system with a VIA KM266 Northbridge and VIA VT8235 Southbridge chipsets. It is installed as software raid with disk1 on primary master (hda) and disk2 on secondary master (hdc).
The system seemed to be working fine for a couple of weeks but over the past few days I been getting raid errors on hdc. Initially I thought that it was a faulty new h/d but investigations have shown it is caused by irq timeouts
May 13 17:36:23 millenium4 kernel: hdc: irq timeout: status=0xd0 { Busy }
May 13 17:36:58 millenium4 kernel: ide1: reset timed-out, status=0x80
May 13 17:36:58 millenium4 kernel: hdc: status timeout: status=0x80 { Busy }
May 13 17:36:58 millenium4 kernel: hdc: drive not ready for command
May 13 17:37:28 millenium4 kernel: ide1: reset timed-out, status=0x80
May 13 17:37:28 millenium4 kernel: end_request: I/O error, dev 16:02 (hdc), sector 33030208
May 13 17:37:28 millenium4 kernel: raid1: Disk failure on hdc2, disabling device.
May 13 17:37:28 millenium4 kernel: ^IOperation continuing on 1 devices
further investigation shows that the drives are running in Ultra DMA mode2/ 33Mbit
/sbin/hdparm -I /dev/hdc
/dev/hdc:
non-removable ATA device, with non-removable media
Model Number: ST320014A
Serial Number: 5JZD18QK
Firmware Revision: 3.07
Standards:
Supported: 1 2 3 4 5 6
Likely used: 6
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
bytes/track: 0 (obsolete)
bytes/sector: 0 (obsolete)
current sector capacity: 16514064
LBA user addressable sectors = 39102336
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 2048.0kB ECC bytes: 4 Queue depth: 1
Standby timer values: spec'd by standard
r/w multiple sector transfer: Max = 16 Current = 16
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
even further investigation showed that the VT8235 chipset was not recognized by the kernel. From dmesg
VP_IDE: IDE controller on PCI bus 00 dev 89
PCI: Hardcoded IRQ 14 for device 00:11.1
VP_IDE: chipset revision 6
VP_IDE: not 100% native mode: will probe irqs later
VP_IDE: Unknown VIA SouthBridge, contact Vojtech Pavlik
hda: ST320014A, ATA DISK drive
hdc: ST320014A, ATA DISK drive
Searching the linux newsgroups has shown that there is irq timeout problems with the earlier 2.4 kernels and the VT8235 chipset.
I guess I am trying to say dont install 5.6 on a system with the VT8235 chipset.
Jon
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