topic Re: SCSI Resets in Operating System - HP-UX

SCSI Resets

Stefan Saliba — Tue, 04 Jun 2002 09:24:40 GMT

if you get

if you get May 30 19:46:46 hpux1a vmunix: SCSI: Resetting SCSI -- lbolt: 21221450, bus: 6
May 30 19:46:46 hpux1a vmunix: SCSI: Reset detected -- lbolt: 21221450, bus: 6

It refers to bus 6. How can you identify bus 6. Is it the bus with instance number 6 ?

Re: SCSI Resets

Steve Steel — Tue, 04 Jun 2002 09:48:58 GMT

Hi

Can be many things

If ServiceGuard performs a cluster reform, SCSI RESET messages appear in dmesg and syslog.log. This is because a
cluster reformation requires a race to the cluster lock disk. To ensure
SCSI bus availability for the server to get to the cluster lock structure, RESET is performed.

steve steel

Re: SCSI Resets

Michael Tully — Tue, 04 Jun 2002 10:07:58 GMT

Hi,

Usually this type of error point to a SCSI timeout. You may wish to think about increasing the timeout value.

Cheers
Michael

Re: SCSI Resets

Steve Steel — Tue, 04 Jun 2002 10:27:04 GMT

Hi

1)If it is of limited duration then check for something like a cluster reform at that time.

2)If it is continuous check for HW lights on your disks

3)Always check your patch level.

Steve Steel

Re: SCSI Resets

Stefan Saliba — Tue, 04 Jun 2002 10:30:28 GMT

I'm not asking what the SCSI resets mean, I'm asking how do I identify BUS 6

Re: SCSI Resets

Steve Steel — Tue, 04 Jun 2002 11:37:26 GMT

Hi

man ioscan

hw path A numerical string of hardware components, notated
sequentially from the bus address to the device
address. Typically, the initial number is
appended by slash (/), to represent a bus
converter (if required by your machine), and
subsequent numbers are separated by periods (.).
Each number represents the location of a hardware
component on the path to the device.

ioscan -nf -C disk

Steve Steel

Re: SCSI Resets

Steve Steel — Tue, 04 Jun 2002 11:53:18 GMT

Hi

ioscan -fnkCext_bus

is also good

Steve Steel