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Can NO longer see my scisi tape device /dev/rmt/3

I cannot see my tape drive any longer.
# iostat -En
c0t0d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: FUJITSU  Product: MBB2073RCSUN72G  Revision: 0505 Serial No: 0810A01DFN
Size: 73.41GB <73407865856 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c0t1d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: FUJITSU  Product: MBB2073RCSUN72G  Revision: 0505 Serial No: 0811A01DKV
Size: 73.41GB <73407865856 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c0t2d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: FUJITSU  Product: MBB2147RCSUN146G Revision: 0505 Serial No: 0822H02BY8
Size: 146.81GB <146810536448 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
c1t0d0           Soft Errors: 1 Hard Errors: 0 Transport Errors: 1
Vendor: MATSHITA Product: CD-RW  CW-8124   Revision: DZ13 Serial No:  
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 1 Predictive Failure Analysis: 0
c0t3d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: FUJITSU  Product: MBB2147RCSUN146G Revision: 0505 Serial No: 0819H020VJ
Size: 146.81GB <146810536448 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0


I installed oracle secure backup with oracle's help and can no longer see my tape device.
This is a SUN T2000 server running Solaris 10
A quantum tape drive LTO-3 Ultrium scsi drive 400/800
the tape drive is encased in a 1U 2 drive bay unit
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bkreynolds48
Asked:
bkreynolds48
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1 Solution
 
Joseph GanSystem AdminCommented:
"iostat -En" only shows harddisk errors.

Please show output of:
# mt -f /dev/rmt/3 status
and
# ls -al /dev/rmt/
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bkreynolds48Author Commented:
# mt -f /dev/rmt/3 status
/dev/rmt/3: No such file or directory
 # ls -al /dev/rmt/
/dev/rmt/: No such file or directory
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Joseph GanSystem AdminCommented:
Make sure the tape drve is powered on without any errors, and do this:
# devfsadm
# ls -al /dev/rmt
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bkreynolds48Author Commented:
There is a tape in the drive - there are no error lights
 # devfsadm

 # ls -al /dev/rmt
/dev/rmt: No such file or directory
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Joseph GanSystem AdminCommented:
How did you know the tape drive was /dev/rmt/3 initially?
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bkreynolds48Author Commented:
I have been using /dev/rmt/3 on this machine for two years.
I installed oracle secure backup and now i/dev/rmt is empty.
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Joseph GanSystem AdminCommented:
The oracle secure backup using all different configurations and commands, please look at this link:
http://download.oracle.com/docs/cd/E10317_01/doc/nav/portal_booklist.htm
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bkreynolds48Author Commented:
I have docs on oracle secure backup - I need info on how to restore/create the /dev/rmt/3 and make my tape drive accessible
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bkreynolds48Author Commented:
I brought the tape drive back to the office and it is seen on another machine.
How could I loose the whole /dev/rmt directory by just installing oracle secure backup?
How do I get back /dev/rmt?
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Joseph GanSystem AdminCommented:
Remove oracle secure backup, ensure the tape drive is powered on and do this:
# devfsadm
# ls -al /dev/rmt
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AmolCommented:
Make sure Tape Drive is connected and online
try running devfsadm with root user. This will detect the tape drive and create the entries under /dev/rmt/
(http://docs.sun.com/app/docs/doc/806-0625/6j9vfill4?a=view)
now run mt stat command to check
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