Date: Sun, 02 Jun 1996 21:53:32 -0700 From: Faried Nawaz <fn@pain.csrv.uidaho.edu> To: gibbs@freebsd.org Cc: current@freebsd.org Subject: more aha2940w timeouts. Message-ID: <14268.833777612@pain.csrv.uidaho.edu>
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Hi,
With a kernel built last night around 10pm PST (after a sup), things appeared
stable until 3am, when I got timeouts. I had no reboots or crashes.
The boot dmesg output is
ahc0 <Adaptec 2940 SCSI host adapter> rev 0 int a irq 15 on pci0:13
mapreg[10] type=1 addr=0000fc00 size=0100.
mapreg[14] type=0 addr=fefff000 size=1000.
ahc0: Reading SEEPROM...done.
ahc0: aic7870 Wide Channel, SCSI Id=7, 16 SCBs
ahc0: Reseting Channel A
ahc0: Downloading Sequencer Program...Done
ahc0: Probing channel A
ahc0 waiting for scsi devices to settle
ahc0: target 0 synchronous at 5.0MHz, offset = 0xf
(ahc0:0:0): "CONNER CFA540S 0FAE" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 510MB (1045242 512 byte sectors)
sd0(ahc0:0:0): with 2800 cyls, 4 heads, and an average 93 sectors/track
ahc0: target 4 using 16Bit transfers
ahc0: target 4 synchronous at 10.0MHz, offset = 0x8
(ahc0:4:0): "QUANTUM XP34301 1051" type 0 fixed SCSI 2
sd1(ahc0:4:0): Direct-Access 4106MB (8410200 512 byte sectors)
sd1(ahc0:4:0): with 4076 cyls, 20 heads, and an average 103 sectors/track
The syslog messages are
Jun 2 03:00:18 newshound /kernel: sd0(ahc0:0:0): timed out in command phase, SCSISIGI == 0x84
Jun 2 03:00:21 newshound /kernel: sd1(ahc0:4:0): asserted ATN - device reset inmessage buffer
Jun 2 03:00:21 newshound /kernel: sd1(ahc0:4:0): timed out in command phase, SCSISIGI == 0x94
Jun 2 03:00:21 newshound /kernel: ahc0: Issued Channel A Bus Reset #1. 4 SCBs aborted
Jun 2 03:00:22 newshound /kernel: ahc0: target 0 synchronous at 5.0MHz, offset= 0x8
Jun 2 03:00:22 newshound /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
Jun 2 03:00:22 newshound /kernel: sd0(ahc0:0:0): Power on, reset, or bus device reset occurred field replaceable unit: 14
Jun 2 03:00:22 newshound /kernel: , retries:3
Jun 2 03:00:22 newshound /kernel: ahc0: target 4 using 16Bit transfers
Jun 2 03:00:22 newshound /kernel: sd1(ahc0:4:0): UNIT ATTENTION asc:29,0
Jun 2 03:00:22 newshound /kernel: sd1(ahc0:4:0): Power on, reset, or bus device reset occurred sks:80,0
Jun 2 03:00:22 newshound /kernel: , retries:3
Jun 2 03:00:22 newshound /kernel: ahc0: target 4 synchronous at 10.0MHz, offset= 0x8
Jun 2 07:33:26 newshound /kernel: sd0(ahc0:0:0): timed out in command phase, SCSISIGI == 0x84
Jun 2 07:33:29 newshound /kernel: sd0(ahc0:0:0): BUS DEVICE RESET message queued.
Jun 2 07:33:29 newshound /kernel: sd0(ahc0:0:0): timed out in command phase, SCSISIGI == 0x84
Jun 2 07:33:29 newshound /kernel: ahc0: Issued Channel A Bus Reset #1. 4 SCBs aborted
Jun 2 07:33:29 newshound /kernel: ahc0: target 0 synchronous at 5.0MHz, offset= 0x8
Jun 2 07:33:29 newshound /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
Jun 2 07:33:29 newshound /kernel: sd0(ahc0:0:0): Power on, reset, or bus device reset occurred field replaceable unit: 14
Jun 2 07:33:29 newshound /kernel: , retries:3
Jun 2 07:33:29 newshound /kernel: ahc0: target 4 using 16Bit transfers
Jun 2 07:33:29 newshound /kernel: sd1(ahc0:4:0): UNIT ATTENTION asc:29,0
Jun 2 07:33:29 newshound /kernel: sd1(ahc0:4:0): Power on, reset, or bus device reset occurred sks:80,0
Jun 2 07:33:29 newshound /kernel: , retries:3
Jun 2 07:33:29 newshound /kernel: ahc0: target 4 synchronous at 10.0MHz, offset= 0x8
I don't know what triggered them at either time. I'm guessing heavy disk
activity at 3am (by news.daily) caused the timeouts then.
I did what you mentioned -- disable parity on the controller.
On the brighter side, I've had no vm problems so far (pmap.c -- v1.97,
old p90 with 48mb ram).
faried.
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