Showing Device Does Not Exist While Taking Backup

Friends, while taking backup on /dev/rmt/0cn it is showing device does not exists.

I have checked /dev/rmt 0cn is present there with link file created in /devices/pci@8,700000/scsi@5/st@5,0:cn

I have checked cd /devices/pci@8,700000/scsi@5 but st@5,0:cn is not there. But I found st@3,0:cn.

Then I checked /usr/adm messages files. It is giving these doubtful lines.

more messages |grep st@3*
Sep 27 13:10:43 kolomcr1 scsi: [ID 107833 kern.notice] /pci@8,700000/scsi@5/st@3,0 (st3):
Sep 28 11:34:45 kolomcr1 scsi: [ID 107833 kern.warning] WARNING: /pci@8,700000/scsi@5/st@3,0 (st3):
Sep 28 11:34:48 kolomcr1 scsi: [ID 107833 kern.warning] WARNING: /pci@8,700000/scsi@5/st@3,0 (st3):
Sep 28 11:34:49 kolomcr1 scsi: [ID 107833 kern.warning] WARNING: /pci@8,700000/scsi@5/st@3,0 (st3):

This is Solaris 10 on V490 machine.

Have you tried running the devfsadm command?

Yes i have tried running devsadm in /usr/sbin...but still there is no related st@5 files in /devices/pci@8,700000/scsi@5 which are linked with the /dev/rmt/0cn..

I am getting these infos also from the messages files.

root@host1:/usr/adm
17ksh# more messages.0 |grep st@3*
Sep 17 12:39:45 kolomcr1 scsi: [ID 365881 kern.info] /pci@8,700000/scsi@5/st@5,0 (st7):
Sep 17 12:39:45 kolomcr1 genunix: [ID 936769 kern.info] st7 is /pci@8,700000/scsi@5/st@5,0
Sep 19 16:11:50 kolomcr1 scsi: [ID 365881 kern.info] /pci@8,700000/scsi@5/st@3,0 (st3):
Sep 19 16:11:50 kolomcr1 genunix: [ID 936769 kern.info] st3 is /pci@8,700000/scsi@5/st@3,0

It should read as "devfsadm" (not devsadm) in my previous post..sorry for that..