D240 : Split Bus

From: Joćo Guedes (Joao.Guedes@sols.pt)
Date: Fri Mar 16 2007 - 12:35:31 EST


I have a SunFire4800 Solaris 9 rev.0 that is booted by a D240 and have a
2x3510 storage.

Info:

Release: 5.9

Kernel architecture: sun4u

Kernel version: SunOS 5.9 Generic 118558-11

OS: Solaris 9 rev.0

Problem:

The D240 is in a split bus configuration with a daisy chain devices.

In one of the bus there are three devices: the root disk+ DLT7000+DDS4

In the other bus: another root disk+CDROM.

The DLT7000 had a problem anda now everytime that I touch the DLT, the bus
gets a lot of transport errors.

00:40:08 xpto scsi: [ID 107833 kern.warning] WARNING:
/ssm@0,0/pci@18,600000/pci@1/scsi@2 (glm0):

00:40:08 xpto got SCSI bus reset

00:40:08 xpto genunix: [ID 408822 kern.info] NOTICE: glm0: fault detected in
device; service still unavailable

00:40:08 xpto genunix: [ID 611667 kern.info] NOTICE: glm0: got SCSI bus reset

00:40:08 xpto scsi: [ID 107833 kern.warning] WARNING:
/ssm@0,0/pci@18,600000/pci@1/scsi@2/sd@0,0 (sd0):

00:40:08 xpto SCSI transport failed: reason 'timeout': retrying command

The DLT7000 had a problem anda now everytime that I touch the DLT, the bus
gets a lot of transport errors.

The Veritas that manages the mirror boot sees that and put the root disk off
(detached) after verifying that can't write to the disk.

00:40:08 xpto vxio: [ID 245403 kern.warning] WARNING: VxVM vxio V-5-0-151
error on Plex rootvol-01 while writing volume rootvol offset 227800 length 52

00:40:08 xpto vxio: [ID 786473 kern.warning] WARNING: VxVM vxio V-5-0-4 Plex
rootvol-01 detached from volume rootvol

00:40:08 xpto vxio: [ID 628984 kern.warning] WARNING: VxVM vxio V-5-0-386
rootmirr-02 Subdisk failed in plex rootvol-01 in vol rootvol

00:40:09 xpto vxvm:vxconfigd: [ID 911688 daemon.notice] V-5-1-768 Offlining
config copy 1 on disk c0t0d0s2:

00:40:09 xpto vxvm:vxconfigd: [ID 672837 daemon.notice] Reason: Disk write
failure

00:40:09 xpto vxvm:vxconfigd: [ID 780815 daemon.notice] V-5-1-7909 Detached
disk rootmirr

.

This is a big problem for me, because I have to reboot the SF4800 to both
disks of the D240 gets ready and sync.

I replaced the tape for a new one and the problem remains...

How can I make a bus reset without make a reboot and how should I solve my
tape problem?

Is there any split bus bug that I don't know?

Thank you.
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