Presently the data of the first two COMPASS testbeam
periods is stored in the WA89
Exabyte EXB-120 tape robot. This data can be accessed
on the WA89 offline farm (machines vsnhd2 - vsnhdg
at CERN). The following procedure should be followed to
use these tapes:
Login onto a machine in the WA89 offline cluster.
Mount the tape you want to use (e.g. tape 20):
robot mount 20
As response you can get the following answers:
The tape was successfully mounted:
Tape X5 20 mounted in drive vsnhd5 MT
The tape is in use by someone else:
Not authorized for tape location 1
There is no drive free in the robot:
No free drive available in the robot.
For other messages consult the man page robot(1).
In case a. you can proceed to use the tape.
To do this, you have to login onto the machine given
to you by the robot mount command (in our example:
vsnhd5). On this machine you have to use the given
device, e.g. /dev/MT to run your job on.
After running your job do not forget to dismount
the tape to free the drive and the tape for other users:
robot dismount 20
Do not try any other way to access these tapes. Do not run jobs
accessing these tapes on machines other then the one given to you
by the robot mount command.