User's Guide

Chapter 3 Emulated DLT7000 SCSI Commands
Send Diagnostic (1Dh)
Quantum DX-Series Software Interface Guide 263
Block Size This field specifies the size of the blocks to be used.
If this field is 0, random block sizes are used.
Default = 8400 bytes (DLTtape III media); 64 K
(DLTtape IV media).
Block Count This field specifies how many blocks to
WRITE /
READ to and from starting on track 0, then moving
to track 1. Default = 500.
For example, if the Block Size and Block Count
fields result in three (3) tracks worth of data, the test
will:
Write tracks 0, 1, 2
REWIND, READ, and VERIFY tracks 0, 1, 2
WRITE three tracks starting with 1: 1, 2, 3 and then
REWIND to the beginning of track 1 and perform the
READ and VERIFY pass.
If Block Count is = 0, data is written until EOT is
reached each time, so almost four (4) complete
passes over the tape would result.
Note: Because of data generation and verification, this test only
streams the tape for short periods of time. If Block Count is
set very high, the test can take many minutes or even
many hours to complete.
If the specified diagnostic test passes, a
GOOD status is returned.
Otherwise, a
CHECK CONDITION is generated and the Sense Data
contains information about the failure.
Field Name Description