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Glossary 147
Glossary
Ultra4 or Ultra320 will transfer at up to 320 MB/s.
Ultra SCSI supports both SE and LVD interfaces. In normal situations, slower
devices can coexist with faster devices, and narrow devices can be used on
the same SCSI bus as wide devices using a suitable adapter.
HP’s Generation 1 Ultrium drives are Ultra2, wide SCSI-3 compatible devices.
They can be used with both LVD and SE host bus adapters.
Generation 2 Ultrium drives are Ultra160, wide SCSI-3 compatible.
single-ended see SCSI
Tape log The Tape log contains details of the history of a tape, the total number of
groups written, of RAW retries, of groups read, and of loads. The log is
copied into RAM when the tape is loaded into the drive, updated as the tape
is used, and loaded back on the tape when it is unloaded.
TapeAlert A set of 64 flags is held in the TapeAlert log that indicate faults or predicted
faults with the drive or the media. For example, the Not Data Grade flag is set
if the drive detects that a non-MRS tape is loaded. By reading this log, host
software can inform the user of existing or impending conditions, and can, for
example, advise the user to change the tape.