SCSI ID numbers
For wide SCSI buses, the SCSI ID will be a number from 0 through 15, so
a typical wide SCSI HBA can accommodate up to fifteen other devices. (On
narrow SCSI buses, the SCSI ID is a number from 0 through 7.)
Each device must have a unique SCSI ID. The drive can be assigned any
unused ID between 0 and 15. Do not use SCSI ID 7, which is reserved for
the SCSI controller. SCSI ID 0 is typically assigned to the boot disk and
should also not be used unless the tape drive is on a dedicated SCSI bus.
SCSI ID 7 is normally reserved for the HBA because it has the highest priority
on the bus. On wide buses, the priority runs from 7 (highest) to 0, then 15
down to 8 (lowest).
As a general rule, avoid putting tape devices on the same
bus as any hard disks.
Note:
Identifying SCSI IDs
If your computer already has devices connected to the SCSI bus, you will
need to know their IDs to avoid any conflict with the new tape drive. Here
are some methods of finding out the information:
•
Most computers display a list of SCSI devices and IDs during the boot-
up process. This usually scrolls past very fast. If you press the [Pause]
key, you should be able to halt the scrolling and view the list.
•
On Windows systems you can use Device Manager.
•
If you have Novell NetWare installed, use its LIST DEVICES command.
If none of these is available to you, try the following sources of information:
•
The details of all installed devices and settings may have been written
down and stored with your computer's documentation (for new computers,
this is often done by the supplier).
•
Your HBA's documentation should tell you which settings it uses.
•
Look at each device to find out its ID. This is usually easy with external
devices. With internal devices, you will probably need the help of the
device's documentation to identify the SCSI ID setting, which is usually
set with jumpers.
51
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August 2009
Identifying SCSI IDs
Summary of Contents for DAT 160
Page 1: ......
Page 6: ...SCSI termination in daisy chained external drives 54 Figure 8 3 1018931 DAT SCSI Tape Drives 6...
Page 8: ...1018931 DAT SCSI Tape Drives 8 Notes...
Page 24: ...1018931 DAT SCSI Tape Drives 24 Chapter 2 Installing an internal DAT tape drive Notes...
Page 38: ...1018931 DAT SCSI Tape Drives 38 Chapter 5 Operating your tape drive Notes...
Page 44: ...1018931 DAT SCSI Tape Drives 44 Chapter 6 Use the correct media Notes...