On Fri, 6 Aug 1999, Douglas Gilbert wrote:
> Just a thought for people looking into this SCSI
> bus reset problem:
> # echo "scsi dump 0" > /proc/scsi/scsi
>
> This will output all the mid level command blocks to
> the console/log. [This may only be useful if your
> root partition is on a IDE disk.] See the function
> scsi_dump_status() in scsi.c to interprete all
> those numbers. Active commands during those resets
> may have useful information in the 3 "timeout"
> related fields.
I'm actually calling scsi_dump_status just before the timoeout message
is printed now anyway. Here's what I'm getting (repeated over and over)
on this particular occasion:
Aug 18 19:56:35 condor kernel: Dump of scsi host parameters:
Aug 18 19:56:35 condor kernel: 0 1 1 : 0 00000000
Aug 18 19:56:35 condor kernel: 0 0 0 : 0 00000000
Aug 18 19:56:35 condor kernel:
Aug 18 19:56:35 condor kernel:
Aug 18 19:56:35 condor kernel: Dump of scsi command parameters:
Aug 18 19:56:35 condor kernel: h:c:t:l (dev sect nsect cnumsec sg) (ret all flg)
(to/cmd to ito) cmd snse result
Aug 18 19:56:35 condor kernel: ( 0) 0:0: 4: 0 ( 00:00 0 0 0 ffff 0) (0 3 0x
0) (3000 0 0) 0x25 0x00 0x00000000
Aug 18 19:56:35 condor kernel: ( 1) 0:0: 4: 0 ( 00:00 0 0 0 ffffffff 0) (0
0 0x 0) ( 0 0 0) 0x00 0x00 0x00000000
Aug 18 19:56:35 condor kernel: ( 2) 0:0: 4: 0 ( 00:00 0 0 0 ffffffff 0) (0
0 0x 0) ( 0 0 0) 0x00 0x00 0x00000000
Aug 18 19:56:35 condor kernel: h:c:t:l (dev sect nsect cnumsec sg) (ret all flg)
(to/cmd to ito) cmd snse result
Aug 18 19:56:35 condor kernel: Dump of pending block device requests
Aug 18 19:56:35 condor kernel: wait_for_request = c01b8578
Aug 18 19:56:35 condor kernel: scsi : aborting command due to timeout : pid 36, scsi0,
channel 0, id 4, lun 0 Read Capacity 00 00 00 00 00 00 00 00 00
There is no process 36.
> Also the low level driver probably outputs
> debug information as well. In the case of my first
> Advansys adapter:
> # cat /proc/scsi/advansys/0
# cat /proc/scsi/aic7xxx/0
Adaptec AIC7xxx driver version: 5.1.19/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7895 Ultra SCSI host adapter
Ultra Wide Controller Channel A
PCI MMAPed I/O Base: 0xe8000000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 11
SCBs: Active 1, Max Active 1,
Allocated 15, HW 32, Page 255
Interrupts: 113
BIOS Control Word: 0x18a6
Adapter Control Word: 0x005e
Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
Ultra Enable Flags: 0x0000
Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 0:
{255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
Actual queue depth per device for aic7xxx host instance 0:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi0:0:4:0)
Device using Narrow/Async transfers.
Transinfo settings: current(0/0/0/0), goal(0/0/0/0), user(12/15/1/0)
Total transfers 0 (0 reads and 0 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+
Reads: 0 0 0 0 0 0 0 0
Writes: 0 0 0 0 0 0 0 0
--
Tim
Quidquid latine dictum sit, altum viditur.
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