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Chapter 3. Preparing the Library
34
As explained above, each logical library has a separate SCSI bus, separate drives, and
separate slots. The following diagrams illustrate different logical library configurations.
Possible Logical Library Configuration 1 In the example below, a four-drive, 40-slot library
is connected to two machines. Each host is allocated 20 tape slots and exclusive rights
to two tape drives each. A SunOS host machine runs Veritas software with 20 slots and
two drives on SCSI Bus 1; an HPUX host machine running Veritas is allocated the
remaining 20 tape slots and two drives on the second SCSI bus. The Emulate 1/2 field
is set to 10 (Sun running Solaris) and the Emulate 3/4 field is set to 13 (HP9000
running HPUX).
Figure 3-5 Possible Logical Library Configuration 1.
SunOS Host
HPUX Host
Drive 1
Drive 2
Drive 3
Drive 4
20 Slots
20 Slots
SCSI Bus 1
SCSI Bus 2