scsi0: PCI error Interrupt with Adaptec ASC-29320A

Hello,

I have a strange problem with my SCSI subsystem. After a few days (7-10 days) of normal work the linux kernel starts to report these messages:

Mar 20 08:19:53 xxxx kernel: scsi0: PCI error Interrupt
Mar 20 08:19:53 xxxx kernel: >>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<
Mar 20 08:19:53 xxxx kernel: scsi0: Dumping Card State at program address 0x1c8 Mode 0x11
Mar 20 08:19:53 xxxx kernel: Card was paused
Mar 20 08:19:53 xxxx kernel: INTSTAT[0x10]:(PCIINT) SELOID[0x3] SELID[0x30]
Mar 20 08:19:53 xxxx kernel: HS_MAILBOX[0x0] INTCTL[0xc0]:(SWTMINTEN|SWTMINTMASK)
Mar 20 08:19:53 xxxx kernel: SEQINTSTAT[0x10]:(SEQ_SWTMRTO) SAVED_MODE[0x11]
Mar 20 08:19:53 xxxx kernel: DFFSTAT[0x19]:(CURRFIFO_1|FIFO0FREE) SCSISIGI[0x26]:(P_DATAOUT_DT|REQI|BSYI)
Mar 20 08:19:53 xxxx kernel: SCSIPHASE[0x1]:(DATA_OUT_PHASE) SCSIBUS[0x0] LASTPHASE[0x20]:(P_DATAOUT_DT)
Mar 20 08:19:53 xxxx kernel: SCSISEQ0[0x0] SCSISEQ1[0x12]:(ENAUTOATNP|ENRSELI)
Mar 20 08:19:53 xxxx kernel: SEQCTL0[0x0] SEQINTCTL[0x0] SEQ_FLAGS[0x20]:(DPHASE)
Mar 20 08:19:53 xxxx kernel: SEQ_FLAGS2[0x0] QFREEZE_COUNT[0x4] KERNEL_QFREEZE_COUNT[0x4]
Mar 20 08:19:53 xxxx kernel: MK_MESSAGE_SCB[0xff00] MK_MESSAGE_SCSIID[0xff]
Mar 20 08:19:53 xxxx kernel: SSTAT0[0x0] SSTAT1[0x9]:(REQINIT|BUSFREE) SSTAT2[0x0]
Mar 20 08:19:53 xxxx kernel: SSTAT3[0x0] PERRDIAG[0xc0]:(HIPERR|HIZERO) SIMODE1[0xac]:(ENSCSIPERR|ENBUSFREE|ENSCSIRST|ENSELTIMO)
Mar 20 08:19:53 xxxx kernel: LQISTAT0[0x0] LQISTAT1[0x0] LQISTAT2[0x0] LQOSTAT0[0x0]
Mar 20 08:19:53 xxxx kernel: LQOSTAT1[0x0] LQOSTAT2[0x0]
Mar 20 08:19:53 xxxx kernel:
Mar 20 08:19:53 xxxx kernel: SCB Count = 40 CMDS_PENDING = 1 LASTSCB 0xffff CURRSCB 0x1e NEXTSCB 0x0
Mar 20 08:19:53 xxxx kernel: qinstart = 20712 qinfifonext = 20712
Mar 20 08:19:53 xxxx kernel: QINFIFO:
Mar 20 08:19:53 xxxx kernel: WAITING_TID_QUEUES:
Mar 20 08:19:53 xxxx kernel: Pending list:
Mar 20 08:19:53 xxxx kernel:  30 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:53 xxxx kernel: Total 1
Mar 20 08:19:53 xxxx kernel: Kernel Free SCB list: 5 32 14 2 10 19 16 39 3 25 8 33 23 26 29 28 27 11 1 6 12 9 21 13 15 31 17 34 18 4 35 7 0 20 38 24 22 37 36
Mar 20 08:19:53 xxxx kernel: Sequencer Complete DMA-inprog list:
Mar 20 08:19:53 xxxx kernel: Sequencer Complete list:
Mar 20 08:19:53 xxxx kernel: Sequencer DMA-Up and Complete list:
Mar 20 08:19:53 xxxx kernel: Sequencer On QFreeze and Complete list:
Mar 20 08:19:53 xxxx kernel:
Mar 20 08:19:53 xxxx kernel:
Mar 20 08:19:53 xxxx kernel: scsi0: FIFO0 Free, LONGJMP == 0x80ff, SCB 0x0
Mar 20 08:19:53 xxxx kernel: SEQIMODE[0x3f]:(ENCFG4TCMD|ENCFG4ICMD|ENCFG4TSTAT|ENCFG4ISTAT|ENCFG4DATA|ENSAVEPTRS) 

Mar 20 08:19:53 xxxx kernel: SEQINTSRC[0x0] DFCNTRL[0x0] DFSTATUS[0x89]:(FIFOEMP|HDONE|PRELOAD_AVAIL)
Mar 20 08:19:53 xxxx kernel: SG_CACHE_SHADOW[0x2]:(LAST_SEG) SG_STATE[0x0] DFFSXFRCTL[0x0]
Mar 20 08:19:53 xxxx kernel: SOFFCNT[0x7f] MDFFSTAT[0x5]:(FIFOFREE|DLZERO) SHADDR = 0x00, SHCNT = 0x0
Mar 20 08:19:53 xxxx kernel: HADDR = 0x00, HCNT = 0x0 CCSGCTL[0x88]:(CCSGENACK|CCSGDONE)
Mar 20 08:19:53 xxxx kernel:
Mar 20 08:19:53 xxxx kernel: scsi0: FIFO1 Active, LONGJMP == 0x1f1, SCB 0x1e
Mar 20 08:19:53 xxxx kernel: SEQIMODE[0x3f]:(ENCFG4TCMD|ENCFG4ICMD|ENCFG4TSTAT|ENCFG4ISTAT|ENCFG4DATA|ENSAVEPTRS) 

Mar 20 08:19:53 xxxx kernel: SEQINTSRC[0x0] DFCNTRL[0x2c]:(DIRECTION|HDMAEN|SCSIEN)
Mar 20 08:19:53 xxxx kernel: DFSTATUS[0xc9]:(FIFOEMP|HDONE|PKT_PRELOAD_AVAIL|PRELOAD_AVAIL)
Mar 20 08:19:53 xxxx kernel: SG_CACHE_SHADOW[0xe0] SG_STATE[0x6]:(LOADING_NEEDED|FETCH_INPROG)
Mar 20 08:19:53 xxxx kernel: DFFSXFRCTL[0x0] SOFFCNT[0x7f] MDFFSTAT[0x4]:(DLZERO)
Mar 20 08:19:53 xxxx kernel: SHADDR = 0x024bc000, SHCNT = 0x0 HADDR = 0x024bc000, HCNT = 0x0
Mar 20 08:19:53 xxxx kernel: CCSGCTL[0x9c]:(CCSGENACK|SG_CACHE_AVAIL|CCSGDONE|CCSGEN)
Mar 20 08:19:53 xxxx kernel: LQIN: 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
Mar 20 08:19:53 xxxx kernel: scsi0: LQISTATE = 0x0, LQOSTATE = 0x0, OPTIONMODE = 0x52
Mar 20 08:19:53 xxxx kernel: scsi0: OS_SPACE_CNT = 0x20 MAXCMDCNT = 0x0
Mar 20 08:19:53 xxxx kernel: scsi0: SAVED_SCSIID = 0x0 SAVED_LUN = 0x0
Mar 20 08:19:53 xxxx kernel:
Mar 20 08:19:53 xxxx kernel: SIMODE0[0xc]:(ENOVERRUN|ENIOERR)
Mar 20 08:19:53 xxxx kernel: CCSCBCTL[0x4]:(CCSCBDIR)
Mar 20 08:19:53 xxxx kernel: scsi0: REG0 == 0x3, SINDEX = 0x1e0, DINDEX = 0xa9
Mar 20 08:19:53 xxxx kernel: scsi0: SCBPTR == 0x1e, SCB_NEXT == 0xffc0, SCB_NEXT2 == 0xfff4
Mar 20 08:19:53 xxxx kernel: CDB 0 c 0 0 e0 28
Mar 20 08:19:53 xxxx kernel: STACK: 0x20a 0x0 0x0 0x0 0x0 0x0 0x0 0x0
Mar 20 08:19:53 xxxx kernel: <<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>
Mar 20 08:19:53 xxxx kernel: scsi0: Data Parity Error has been reported via PERR# in DFF1
Mar 20 08:19:53 xxxx kernel: scsi0: Split completion read data parity error in DFF1
Mar 20 08:19:53 xxxx kernel: scsi0: Signal System Error Detected in DFF1
Mar 20 08:19:53 xxxx kernel: scsi0: Address or Write Phase Parity Error Detected in DFF1.
Mar 20 08:19:59 xxxx kernel: scsi0: PCI error Interrupt
Mar 20 08:19:59 xxxx kernel: >>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<
Mar 20 08:19:59 xxxx kernel: scsi0: Dumping Card State at program address 0x32 Mode 0x33
Mar 20 08:19:59 xxxx kernel: Card was paused
Mar 20 08:19:59 xxxx kernel: INTSTAT[0x10]:(PCIINT) SELOID[0x3] SELID[0x30]
Mar 20 08:19:59 xxxx kernel: HS_MAILBOX[0x0] INTCTL[0xc0]:(SWTMINTEN|SWTMINTMASK)
Mar 20 08:19:59 xxxx kernel: SEQINTSTAT[0x10]:(SEQ_SWTMRTO) SAVED_MODE[0x11]
Mar 20 08:19:59 xxxx kernel: DFFSTAT[0x19]:(CURRFIFO_1|FIFO0FREE) SCSISIGI[0xe6]:(P_MESGIN|REQI|BSYI)
Mar 20 08:19:59 xxxx kernel: SCSIPHASE[0x8]:(MSG_IN_PHASE) SCSIBUS[0x2] LASTPHASE[0x20]:(P_DATAOUT_DT)
Mar 20 08:19:59 xxxx kernel: SCSISEQ0[0x40]:(ENSELO) SCSISEQ1[0x12]:(ENAUTOATNP|ENRSELI)
Mar 20 08:19:59 xxxx kernel: SEQCTL0[0x0] SEQINTCTL[0x0] SEQ_FLAGS[0x20]:(DPHASE)
Mar 20 08:19:59 xxxx kernel: SEQ_FLAGS2[0x0] QFREEZE_COUNT[0x4] KERNEL_QFREEZE_COUNT[0x4]
Mar 20 08:19:59 xxxx kernel: MK_MESSAGE_SCB[0xff00] MK_MESSAGE_SCSIID[0xff]
Mar 20 08:19:59 xxxx kernel: SSTAT0[0x2]:(SPIORDY) SSTAT1[0x19]:(REQINIT|BUSFREE|PHASEMIS)
Mar 20 08:19:59 xxxx kernel: SSTAT2[0x0] SSTAT3[0x0] PERRDIAG[0xc0]:(HIPERR|HIZERO)
Mar 20 08:19:59 xxxx kernel: SIMODE1[0xac]:(ENSCSIPERR|ENBUSFREE|ENSCSIRST|ENSELTIMO)
Mar 20 08:19:59 xxxx kernel: LQISTAT0[0x0] LQISTAT1[0x0] LQISTAT2[0x0] LQOSTAT0[0x0]
Mar 20 08:19:59 xxxx kernel: LQOSTAT1[0x0] LQOSTAT2[0x0]
Mar 20 08:19:59 xxxx kernel:
Mar 20 08:19:59 xxxx kernel: SCB Count = 40 CMDS_PENDING = 17 LASTSCB 0xffff CURRSCB 0x11 NEXTSCB 0x0
Mar 20 08:19:59 xxxx kernel: qinstart = 21076 qinfifonext = 21076
Mar 20 08:19:59 xxxx kernel: QINFIFO:
Mar 20 08:19:59 xxxx kernel: WAITING_TID_QUEUES:
Mar 20 08:19:59 xxxx kernel:        3 ( 0x11 0x1e )
Mar 20 08:19:59 xxxx kernel: Pending list:
Mar 20 08:19:59 xxxx kernel:  30 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  17 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  25 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:   3 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  31 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  26 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  29 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  13 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  32 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  34 FIFO_USE[0x0] SCB_CONTROL[0x60]:(TAG_ENB|DISCENB) SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  22 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:   6 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  20 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  35 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  10 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  28 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel:  33 FIFO_USE[0x0] SCB_CONTROL[0x64]:(DISCONNECTED|TAG_ENB|DISCENB)
Mar 20 08:19:59 xxxx kernel: SCB_SCSIID[0x3f]:(OID)
Mar 20 08:19:59 xxxx kernel: Total 17
Mar 20 08:19:59 xxxx kernel: Kernel Free SCB list: 19 21 12 9 5 8 11 27 1 39 16 24 14 38 2 4 0 18 7 15 23 37 36
Mar 20 08:19:59 xxxx kernel: Sequencer Complete DMA-inprog list:
Mar 20 08:19:59 xxxx kernel: Sequencer Complete list:
Mar 20 08:19:59 xxxx kernel: Sequencer DMA-Up and Complete list:
Mar 20 08:19:59 xxxx kernel: Sequencer On QFreeze and Complete list:
Mar 20 08:19:59 xxxx kernel:
Mar 20 08:19:59 xxxx kernel:
Mar 20 08:19:59 xxxx kernel: scsi0: FIFO0 Free, LONGJMP == 0x80ff, SCB 0x0
Mar 20 08:19:59 xxxx kernel: SEQIMODE[0x3f]:(ENCFG4TCMD|ENCFG4ICMD|ENCFG4TSTAT|ENCFG4ISTAT|ENCFG4DATA|ENSAVEPTRS) 

Mar 20 08:19:59 xxxx kernel: SEQINTSRC[0x0] DFCNTRL[0x0] DFSTATUS[0x89]:(FIFOEMP|HDONE|PRELOAD_AVAIL)
Mar 20 08:19:59 xxxx kernel: SG_CACHE_SHADOW[0x2]:(LAST_SEG) SG_STATE[0x0] DFFSXFRCTL[0x0]
Mar 20 08:19:59 xxxx kernel: SOFFCNT[0x0] MDFFSTAT[0x5]:(FIFOFREE|DLZERO) SHADDR = 0x00, SHCNT = 0x0
Mar 20 08:19:59 xxxx kernel: HADDR = 0x00, HCNT = 0x0 CCSGCTL[0x10]:(SG_CACHE_AVAIL)
Mar 20 08:19:59 xxxx kernel:
Mar 20 08:19:59 xxxx kernel: scsi0: FIFO1 Active, LONGJMP == 0x81f1, SCB 0x22
Mar 20 08:19:59 xxxx kernel: SEQIMODE[0x3f]:(ENCFG4TCMD|ENCFG4ICMD|ENCFG4TSTAT|ENCFG4ISTAT|ENCFG4DATA|ENSAVEPTRS) 

Mar 20 08:19:59 xxxx kernel: SEQINTSRC[0x0] DFCNTRL[0xc]:(DIRECTION|HDMAEN)
Mar 20 08:19:59 xxxx kernel: DFSTATUS[0x89]:(FIFOEMP|HDONE|PRELOAD_AVAIL) SG_CACHE_SHADOW[0x1b]:(LAST_SEG_DONE|LAST_SEG)
Mar 20 08:19:59 xxxx kernel: SG_STATE[0x0] DFFSXFRCTL[0x0] SOFFCNT[0x0] MDFFSTAT[0x14]:(DLZERO|LASTSDONE)
Mar 20 08:19:59 xxxx kernel: SHADDR = 0x04870a000, SHCNT = 0x0 HADDR = 0x04870a000, HCNT = 0x0
Mar 20 08:19:59 xxxx kernel: CCSGCTL[0x10]:(SG_CACHE_AVAIL)
Mar 20 08:19:59 xxxx kernel: LQIN: 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0 0x0
Mar 20 08:19:59 xxxx kernel: scsi0: LQISTATE = 0x0, LQOSTATE = 0x0, OPTIONMODE = 0x52
Mar 20 08:19:59 xxxx kernel: scsi0: OS_SPACE_CNT = 0x20 MAXCMDCNT = 0x0
Mar 20 08:19:59 xxxx kernel: scsi0: SAVED_SCSIID = 0x0 SAVED_LUN = 0x0
Mar 20 08:19:59 xxxx kernel: SIMODE0[0xc]:(ENOVERRUN|ENIOERR)
Mar 20 08:19:59 xxxx kernel: CCSCBCTL[0x0]
Mar 20 08:19:59 xxxx kernel: scsi0: REG0 == 0xffff, SINDEX = 0x11a, DINDEX = 0xa9
Mar 20 08:19:59 xxxx kernel: scsi0: SCBPTR == 0x22, SCB_NEXT == 0x20, SCB_NEXT2 == 0x20
Mar 20 08:19:59 xxxx kernel: CDB 2a 0 14 80 18 68
Mar 20 08:19:59 xxxx kernel: STACK: 0x20c 0x0 0x0 0x0 0x0 0x0 0x0 0x0
Mar 20 08:19:59 xxxx kernel: <<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>
Mar 20 08:19:59 xxxx kernel: scsi0: Data Parity Error has been reported via PERR# in DFF1
Mar 20 08:19:59 xxxx kernel: scsi0: Split completion read data parity error in DFF1
Mar 20 08:19:59 xxxx kernel: scsi0: Signal System Error Detected in DFF1
Mar 20 08:19:59 xxxx kernel: scsi0: Address or Write Phase Parity Error Detected in DFF1.

After a few of those messages the file system gets corrupted and the partition is mounted read-only.

I already tried changing the scsi cables, terminators, running without terminators, changing the SCSI controler card (unfortunately i only had exactly same model) but nothing helps and i'm running out of ideas. I have two identical machines: same motherboard, same scsi controler connected to almost the same (difference is only in the number of hard disk bays) external RAID units and it happens on both of them. On one it happens regularly on the other it only happened twice in one year.

The same SCSI setup (same external raid and scsi controlers) was used before on different motherboard and it worked ok, so i'm assuming that the problem isn't between the scsi controler and the external RAID.

I'm currently running debian 2.6.22-3-amd64 kernel. I also tried stock debian 2.6.18-5-amd64 kernel with the same results.

I also tried disabling the ACPI and the results were the same.

Any ideas/help would be very helpful.

Regards,

Primoz

HW data:

Motherboard: SuperMicro X7DBR-E
Processor: Intel Xeon 5150
SCSI controler: Adaptec ASC-29320A
External RAID: InforTrend A08U-G1410

Some additional data:

Linux: Debian 4.0
Arch: x86_64

lspci
00:00.0 Host bridge: Intel Corporation 5000P Chipset Memory Controller Hub (rev b1) 00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 2-3 (rev b1) 00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 4-5 (rev b1) 00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 6-7 (rev b1) 00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA Engine (rev b1) 00:10.0 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting Registers (rev b1) 00:10.1 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting Registers (rev b1) 00:10.2 Host bridge: Intel Corporation 5000 Series Chipset Error Reporting Registers (rev b1) 00:11.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev b1) 00:13.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers (rev b1) 00:15.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev b1) 00:16.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev b1) 00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI Express Root Port 1 (rev 09) 00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #1 (rev 09) 00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #2 (rev 09) 00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #3 (rev 09) 00:1d.3 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB Controller #4 (rev 09) 00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset EHCI USB2 Controller (rev 09) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC Interface Controller (rev 09) 00:1f.1 IDE interface: Intel Corporation 631xESB/632xESB IDE Controller (rev 09) 00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus Controller (rev 09) 01:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream Port (rev 01) 01:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X Bridge (rev 01) 02:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E1 (rev 01) 02:02.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream Port E3 (rev 01) 04:00.0 Ethernet controller: Intel Corporation 631xESB/632xESB DPT LAN Controller Copper (rev 01) 04:00.1 Ethernet controller: Intel Corporation 631xESB/632xESB DPT LAN Controller Copper (rev 01) 05:01.0 SCSI storage controller: Adaptec ASC-29320A U320 (rev 10)
08:00.0 PCI bridge: Intel Corporation 6702PXH PCI Express-to-PCI Bridge A (rev 09) 0a:01.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)

/proc/interrupts
CPU0 CPU1

 0:   76027268   76025263   IO-APIC-edge      timer
 1:       1011       1052   IO-APIC-edge      i8042
 4:      37108      37134   IO-APIC-edge      serial
 8:          0          0   IO-APIC-edge      rtc
 9:          0          0   IO-APIC-fasteoi   acpi
12:          2          1   IO-APIC-edge      i8042
14:         19         18   IO-APIC-edge      ide0
16:          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
17:          0          0   IO-APIC-fasteoi   uhci_hcd:usb1, ehci_hcd:usb5
18:          0          0   IO-APIC-fasteoi   uhci_hcd:usb3
19:          0          0   IO-APIC-fasteoi   uhci_hcd:usb2
24:    4391317    4392842   IO-APIC-fasteoi   aic79xx
1272:     245051     247594   PCI-MSI-edge      eth1
1273:   21405357   21403145   PCI-MSI-edge      eth0
NMI:          0          0
LOC:  152058048  152058024
ERR:          0

The adaptec card gives this type of interrupt when it detects an error on the PCI bus.

This cryptic piece at the end is the actual error:

But it's claiming an actual PCI bus parity error.

I'm afraid if the problem is on the PCI bus, changing the SCSI piece won't necessarily help. Unless anyone with specific PCI advice can chime in, about the best you can do is reseat the card (or preferably move it to a different slot) and hope the error goes away.

James

I exchanged the machine for a different one (different chipset and cpu) but left the PCI scsi controler. Since then, there weren't any PCI parity errors. So i decided to send the Supermicro back for repair (or at least checkup) since it's still under warranty.
Meanwhile another machine (same type of supermicro server, same scsi controler, ...) experienced the same PCI parity error. The machine worked fine for several months before, and nothing vital (no HW, kernel, ...) was changed, so i'm assuming this error happens upon high load and that it's not due to broken hardware (PCI bus) but due to some SW bug.

Regards,
Primoz