SUMMARY: SCSI bus resets

I unhooked the L25 from the scsi chain and attached the array directly to
the server. All appears fine now. I'm thinking of getting another HBA and
attaching the L25 to it. That way if there are any problems with the tape
library I can detach it without taking down the array.

 

Thanks for all who replied.

 

Ray

 

 

> -----Original Message-----

> From: sunmanagers-bounces@sunmanagers.org

> [mailto:sunmanagers-bounces@sunmanagers.org]On
<mailto:sunmanagers-bounces@sunmanagers.org%5dOn>  Behalf Of Ray Pengelly

> Sent: 21 January 2004 23:13

> To: sunmanagers@sunmanagers.org

> Subject: SCSI bus resets

>

>

> I have a server running solaris 9 x86. It uses the AIC 7902w ultra 320 

> scsi controller. This controller is dual channel. It has a 36 GB 

> Seagate ST336607LW on the A channel (internal) and an external storage 

> array, and L25 with one sdlt320 drive on channel B.

>

>

>

> The internal drive is /dev/rdsk/c0t0d0

>

>

>

> And has 3 partitions       /           s0

>

>                                     /usr       s6

>

>                                     /opt       s7

>

>

>

> The external raid array has one array divided up into two 512GB LUNs 

> which are mounted as /DATA1 and /DATA2. They are /dev/rdsk/c2t0d0s6 

> and /c2t0d1s6.

>

>

>

>

> I successfully created filesystems on the external array and mounted 

> them. They have nfs mounts and have been in use for about a week. 

> Suddenly they stopped working today. I found the following errors in 

> /var/adm/messages

>

>

>

> n 21 15:36:53 dmstore   SCSI transport failed: reason 'reset': retrying

> command

>

> Jan 21 15:36:53 dmstore scsi: [ID 107833 kern.warning] WARNING: 

> /pci@0,0/pci8086,2545@3/pci8086,1460@1d/pci9005,ffff@2,1/sd@0,0 

> (sd16):

>

> Jan 21 15:36:53 dmstore       SCSI transport failed: reason

> 'unexpected_bus_free': retrying command

>

> Jan 21 15:37:28 dmstore adpu320: [ID 518805 kern.warning] WARNING: 

> Timeout on target 0 lun 0.  Initiating recovery. Jan 21 15:37:30 

> dmstore scsi: [ID 107833 kern.warning] WARNING: 

> /pci@0,0/pci8086,2545@3/pci8086,1460@1d/pci9005,ffff@2,1/sd@0,0 

> (sd16):

>

> Jan 21 15:37:30 dmstore       SCSI transport failed: reason 'reset':

> retrying command

>

> Jan 21 15:37:30 dmstore scsi: [ID 107833 kern.warning] WARNING: 

> /pci@0,0/pci8086,2545@3/pci8086,1460@1d/pci9005,ffff@2,1/sd@0,0 

> (sd16):

>

> Jan 21 15:37:30 dmstore       SCSI transport failed: reason

> 'unexpected_bus_free': retrying command

>

>

>

> Any idea what could be causing this? If I try to mount to mount the 

> drives I

> get:

>

>

>

> mount:/ I/O error

>

> mount: cannot open /dev/dsk/c2t0d0s6

>

>

>

> If I look at the disks under SMC both c2t0d0s6 and c2t0d1s6 show up 

> but their size is 0. Anyone have any clue what is going on?

>

>

>

> Ray

>

>

>

> Ray Pengelly

>

> Computing Support Technologist

>

> Centre for Neuroscience Studies/

>

> CIHR Group in Sensory-Motor Systems

>

> Queen's University

>

> 613-533-6000 ext 74139

>

>

>

> Give a person a fish and you feed them for a day; teach that person to 

> use the Internet and they won't bother you for weeks. 

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