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07-07-2004 12:09 PM
07-07-2004 12:09 PM
0m
0mb
0mn
0mnb
1m
1mb
1mn
1mnb
c0t3d0BEST ...
From what I have seen ...
/dev/rmt/0m -- rewind the tape to the start after any command
/dev/rmt/0mn -- no-rewind leave the tape at the position where the old command left off
Steve
Solved! Go to Solution.
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07-07-2004 12:14 PM
07-07-2004 12:14 PM
SolutionRun lssf command against the device files - will tell you the characteristics of each of the device files
# lssf /dev/rmt/0m
stape card instance 3 SCSI target 3 SCSI LUN 0 at&t best density available at address 0/4/0/0.3.0 /dev/rmt/0m
# lssf /dev/rmt/0mn
stape card instance 3 SCSI target 3 SCSI LUN 0 at&t no rewind best density available at address 0/4/0/0.3.0 /de
v/rmt/0mn
# lssf /dev/rmt/0mnb
stape card instance 3 SCSI target 3 SCSI LUN 0 berkeley no rewind best density available at address 0/4/0/0.3.0
/dev/rmt/0mnb
#
b = confirms to the berkeley standard - by default it is AT&T
c0t3d0BEST = uses best density available (software compression) - Same as 0m - no big difference.
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07-07-2004 12:15 PM
07-07-2004 12:15 PM
Re: /dev/rmt/0????
You'll find a full explanation of the what each device file means in the man page:
# man mt
Cheers
Con
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07-07-2004 12:15 PM
07-07-2004 12:15 PM
Re: /dev/rmt/0????
# man 7 mt
Cheers
Con
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07-08-2004 09:18 PM
07-08-2004 09:18 PM
Re: /dev/rmt/0????
I was lately at a HP advanced Administrator Course, and there they adviced to use only the /dev/rmt/c0t3d0BEST device.
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07-09-2004 04:05 AM
07-09-2004 04:05 AM
Re: /dev/rmt/0????
Thank you for your response.
I was using different device files with lots of success. The /dev/rmt/1nm type is great when I do not want the tape to rewind when a command has completed. Using this method I can continue a store later if needed and also store different versions of the same file on the same tape, that is a fine feature. The other device is useful when I just need to do one command and have it at BOT when done with that command, WOW I like that too.
Now with the device /dev/rmt/c0t3d0BEST is it going to know to rewind or not rewind when a store type command is giving, default being rewind? We have c0t0d0BESTnb and I guess that would be a NO-REWIND Berkley and c0t0d0BESTb would be REWIND Berkley, correct?
Steve
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07-09-2004 04:10 AM
07-09-2004 04:10 AM
Re: /dev/rmt/0????
c0t0d0BESTnb = No-rewind Berkeley and uses the best compression possible
c0t0d0BESTb = Rewind Berkeley and again uses the best compression possible
-- Sundar.
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07-09-2004 04:18 AM
07-09-2004 04:18 AM
Re: /dev/rmt/0????
Like for 0m and for BEST.
So they are same, represeted in different way.
Anil
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07-09-2004 04:51 AM
07-09-2004 04:51 AM
Re: /dev/rmt/0????
Thank you Anil that is just one more great answer and helps a great deal
Thank you
Steve