
SCSI Commands
5-214 Quantum DLT 8000 Tape System
SEND DIAGNOSTIC Command (1Dh) (continued)
Table 5–96 SEND DIAGNOSTIC Parameter List — Field Descriptions (continued)
Field Name Description
Block Count This field specifies how many blocks to WRITE / READ to and from
starting on track 0, then moving to track 1. For example, if the Block
Size and Block Count fields result in three (3) tracks worth of data, the
test will:
1. Write tracks 0, 1, 2
2. REWIND, READ, and VERIFY tracks 0, 1, 2
3. 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
that for BHC Test*, the value of this field must be 0.
* The BHC feature is provided for use only by a trained service provider.
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, therefore, the test can take
many minutes or even many hours to complete
NOTE
If BHC* test runs and passes, a GOOD status is returned.
If BHC* test runs and fails, a CHECK CONDITION is generated, with a sense code
containing the following:
Sense Key = 04h (Hardware Error)
ASC = 84h (BHC Result)
ASCQ = 01h (BHC Failed)
* The BHC feature is provided for use only by a trained service provider.
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