I have a Sun Sparc5, and after upgrading my kernel from
2.2.5-15 to 2.2.5-22, I get numerous scsi bus resets that
I didn't get before the upgrade.

In /var/log/messages, besides the scsi bus reset messages,
another message I noticed was "AIEEE wide msg received and
not HME".

After looking around in the source code, I saw that the
message originates from /usr/src/linux/drivers/scsi/esp.c
function - check_multibyte_msg().

The scsi bus resets occur in two cases on my machine:

1.  during the boot sequence

    During the boot sequence, just before the login screen
    appears, the disk drive starts clicking (meaning the
    scsi bus resets are occurring).  It clicks for almost
    2 minutes with just the blue blank screen before the
    Redhat login screen appears.

2.  Whenever a command involving files on my second disk
    drive is run.  (i.e. ls, cp, mv, etc.)


From the file /var/log/dmesg...

using fastest function: SPARC (57.150 MB/sec)
esp0: IRQ 36 SCSI ID 7 Clk 40MHz CCF=8 TOut 167
NCR53C9XF(espfast)
ESP: Total of 1 ESP hosts found, 1 actually in use.
scsi0 : Sparc ESP100A-FAST
scsi : 1 host.
 Vendor: SEAGATE   Model: ST5660N  SUN0535  Rev: 0644
  Type:   Direct-Access                      ANSI SCSI
revision: 02
Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
esp0: AIEEE wide msg received and not HME.
esp0: hoping for msgout
  Vendor: COMPAQ    Model: ST34501WC         Rev: AF03
  Type:   Direct-Access                      ANSI SCSI
revision: 02
Detected scsi disk sdb at scsi0, channel 0, id 3, lun 0
  Vendor: TOSHIBA   Model: XM-4101TASUNSLCD  Rev: 1084
  Type:   CD-ROM                             ANSI SCSI
revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 6, lun 0

===========================================================


Output from --->  cat /proc/scsi/esp/0


Sparc ESP Host Adapter:
        PROM node               ffd3d230
        PROM name               esp
        ESP Model               FAS100A
        DMA Revision            Rev 2
        Live Targets            [ 1 3 6 ]

Target #   config3    Sync Capabilities  Disconnect Wide
1          00000003   [2f,04]            yes        no
3          0000000    [2f,04]            yes        no
6          00000001   [2f,04]            yes        no


==========================================================

a few lines from --->  /var/log/messages
(there are a bunch of these)


Aug 26 04:32:28 localhost kernel: esp0: Resetting scsi bus
Aug 26 04:32:28 localhost kernel: esp0: SCSI bus reset
interrupt
Aug 26 04:32:28 localhost kernel: esp0: SCSI bus reset
interrupt
Aug 26 04:32:28 localhost kernel: esp0: AIEEE wide msg
received and not HME.
Aug 26 04:32:28 localhost kernel: esp0: hoping for msgout
Aug 26 04:32:28 localhost kernel: esp0: Resetting scsi bus
Aug 26 04:32:28 localhost kernel: esp0: SCSI bus reset
interrupt
Aug 26 04:32:28 localhost kernel: esp0: SCSI bus reset
interrupt
Aug 26 04:32:29 localhost kernel: esp0: AIEEE wide msg
received and not HME.
Aug 26 04:32:29 localhost kernel: esp0: hoping for msgout
Aug 26 04:32:29 localhost kernel: esp0: Resetting scsi bus
Aug 26 04:32:29 localhost kernel: esp0: SCSI bus reset
interrupt
Aug 26 04:32:29 localhost kernel: esp0: SCSI bus reset
interrupt
Aug 26 04:32:29 localhost kernel: esp0: AIEEE wide msg
received and not HME.
Aug 26 04:32:29 localhost kernel: esp0: hoping for msgout


==========================================================

If you can help, please let me know.


THANKS!!!

Richard Davis, Jr.