Operating instructions

2-2
SCSI REFERENCE PRELIMINARY 1012975
CHAPTER 2—OVERVIEW OF THE AUTOLOADER AS A SCSI DEVICE
Each device attached to a SCSI bus has a unique SCSI ID that identifies it
during communication. In wide SCSI configurations, up to 16 devices
(including one or more initiators) can be attached to each SCSI bus. SCSI
IDs can range from 0 to 15 for each bus.
2.2 ELEMENTS AND ELEMENT ADDRESSES
When you issue SCSI commands to the autoloader, you may need to specify
an element address to identify a specific location (called an element). The
autoloader contains the following types of elements:
Medium transport element. The carousel and cartridge loader comprise the
medium transport element. Together they move the cartridges in the
autoloader.
Storage elements. The cartridge cells in the autoloader are the storage
elements that store the cartridges while they are not being used in the tape
drive.
Data transfer element. The tape drive is a data transfer element that reads
and writes data. The tape drive has its own SCSI ID and responds to tape
drive-specific SCSI commands.
!
! !
! Important
Although single-ended SCSI is compatible with Ultra-2 and Ultra-3
SCSI, Exabyte does not support single-ended devices on the SCSI
bus used by the autoloader.
Attaching an HVD device to an LVD SCSI bus may cause the SCSI
bus to hang.