Hello gentlemen, I've observed a very strange SCSI trouble never seen before. It happened suddenly, under very low system load and disk activity; though it didn't lead to any damage or data loss, but I'm curious what could be a cause. Visually, it appeared like a delay in disk access but at the same time high SCSI bus activity took place, and lasted about for a minute. SCSI controller is a dual-channel UWSCSI AIC-7895, failed HDD is an old IBM UltraStar XP (DFHS) hanging on channel A: ahc0: <Adaptec aic7895 Ultra SCSI adapter> port 0xe400-0xe4ff mem 0xfebfe000-0xfebfefff irq 11 at device 14.0 on pci0 aic7895C: Ultra Wide Channel A, SCSI Id=7, 32/253 SCBs ahc1: <Adaptec aic7895 Ultra SCSI adapter> port 0xe800-0xe8ff mem 0xfebff000-0xfebfffff irq 11 at device 14.1 on pci0 aic7895C: Ultra Wide Channel B, SCSI Id=7, 32/253 SCBs da0 at ahc0 bus 0 target 0 lun 0 da0: <IBM DFHSS2W 4141> Fixed Direct Access SCSI-2 device da0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing Enabled da0: 2150MB (4404489 512 byte sectors: 255H 63S/T 274C) Full output from stderr is attached. Also I'm sure there was no power failure. It appeared about a week ago and I didn't pay much attention to, but today it happened again (though symptoms were a little different), with the same drive... --- Regards, Rhett (da0:ahc0:0:0:0): SCB 0x17 - timed out ahc0: Dumping Card State in Data-out phase, at SEQADDR 0x7d ACCUM = 0x0, SINDEX = 0x17, DINDEX = 0x52, ARG_2 = 0xff HCNT = 0xe0 SCBPTR = 0x10 SCSIPHASE[0x1f] SCSIBUSL[0x0] LASTPHASE[0x0] SCSISEQ[0x12] SBLKCTL[0x2] SEQCTL[0x10] SEQ_FLAGS[0x20] SSTAT0[0x0] SSTAT1[0x2] SSTAT2[0x10] SSTAT3[0x0] SIMODE0[0x0] SIMODE1[0xac] SXFRCTL0[0x80] DFCNTRL[0x7c] DFSTATUS[0x40] STACK: SCB count = 50 Kernel NEXTQSCB = 15 Card NEXTQSCB = 20 QINFIFO entries: 20 6 8 25 48 5 46 27 26 2 1 Waiting Queue entries: Disconnected Queue entries: QOUTFIFO entries: Sequencer Free SCB List: 12 24 13 28 20 5 29 23 17 25 4 8 7 15 2 22 11 14 26 9 6 1 27 19 3 10 18 0 31 30 21 Sequencer SCB Info: 0 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 1 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 2 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 3 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 4 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 5 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 6 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 7 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 8 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 9 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 10 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 11 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 12 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 13 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 14 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 15 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 16 SCB_CONTROL[0x62] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0x17] 17 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 18 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 19 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 20 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 21 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 22 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 23 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 24 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 25 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 26 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 27 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 28 SCB_CONTROL[0xe2] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 29 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 30 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 31 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] Pending list: 1 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 2 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 26 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 27 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 46 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 5 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 48 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 25 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 8 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 6 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 20 SCB_CONTROL[0x62] SCB_SCSIID[0x7] SCB_LUN[0x0] 23 SCB_CONTROL[0x62] SCB_SCSIID[0x7] SCB_LUN[0x0] Kernel Free SCB list: 28 14 12 9 37 21 7 33 49 32 30 31 4 39 0 11 22 24 17 19 35 10 34 36 16 18 3 29 13 47 38 45 44 43 42 41 40 sg[0] - Addr 0x80db000 : Length 4096 sg[1] - Addr 0x7b5c000 : Length 4096 sg[2] - Addr 0x81bd000 : Length 4096 sg[3] - Addr 0x7b1e000 : Length 4096 (da0:ahc0:0:0:0): BDR message in message buffer (da0:ahc0:0:0:0): SCB 0x17 - timed out ahc0: Dumping Card State in Data-out phase, at SEQADDR 0x59 ACCUM = 0x0, SINDEX = 0x17, DINDEX = 0x52, ARG_2 = 0xff HCNT = 0xe0 SCBPTR = 0x10 SCSIPHASE[0x1f] SCSIBUSL[0x0] LASTPHASE[0x0] SCSISEQ[0x12] SBLKCTL[0x2] SEQCTL[0x10] SEQ_FLAGS[0x20] SSTAT0[0x0] SSTAT1[0x2] SSTAT2[0x10] SSTAT3[0x0] SIMODE0[0x0] SIMODE1[0xac] SXFRCTL0[0x80] DFCNTRL[0x7c] DFSTATUS[0x40] STACK: SCB count = 50 Kernel NEXTQSCB = 15 Card NEXTQSCB = 20 QINFIFO entries: 20 6 8 25 48 5 46 27 26 2 1 Waiting Queue entries: Disconnected Queue entries: QOUTFIFO entries: Sequencer Free SCB List: 12 24 13 28 20 5 29 23 17 25 4 8 7 15 2 22 11 14 26 9 6 1 27 19 3 10 18 0 31 30 21 Sequencer SCB Info: 0 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 1 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 2 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 3 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 4 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 5 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 6 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 7 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 8 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 9 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 10 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 11 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 12 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 13 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 14 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 15 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 16 SCB_CONTROL[0x62] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0x17] 17 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 18 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 19 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 20 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 21 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 22 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 23 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 24 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 25 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 26 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 27 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 28 SCB_CONTROL[0xe2] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 29 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 30 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] 31 SCB_CONTROL[0xe0] SCB_SCSIID[0x7] SCB_LUN[0x0] SCB_TAG[0xff] Pending list: 1 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 2 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 26 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 27 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 46 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 5 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 48 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 25 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 8 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 6 SCB_CONTROL[0x60] SCB_SCSIID[0x7] SCB_LUN[0x0] 20 SCB_CONTROL[0x62] SCB_SCSIID[0x7] SCB_LUN[0x0] 23 SCB_CONTROL[0x62] SCB_SCSIID[0x7] SCB_LUN[0x0] Kernel Free SCB list: 28 14 12 9 37 21 7 33 49 32 30 31 4 39 0 11 22 24 17 19 35 10 34 36 16 18 3 29 13 47 38 45 44 43 42 41 40 sg[0] - Addr 0x80db000 : Length 4096 sg[1] - Addr 0x7b5c000 : Length 4096 sg[2] - Addr 0x81bd000 : Length 4096 sg[3] - Addr 0x7b1e000 : Length 4096 (da0:ahc0:0:0:0): no longer in timeout, status = 34b ahc0: Issued Channel A Bus Reset. 12 SCBs aborted (da0:ahc0:0:0:0): WRITE(06). CDB: a 6 21 b3 20 0 (da0:ahc0:0:0:0): CAM Status: SCSI Status Error (da0:ahc0:0:0:0): SCSI Status: Check Condition (da0:ahc0:0:0:0): UNIT ATTENTION asc:29,0 (da0:ahc0:0:0:0): Power on, reset, or bus device reset occurred (da0:ahc0:0:0:0): Retrying Command (per Sense Data) __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btofferReceived on Sat Apr 05 2003 - 16:27:29 UTC
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