Quantum DLT1/VS80 SCSI, Interface Manual

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DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01 July 2004 4-113
If the Maximum Number of Test Passes is 0, causes testing to loop forever. A BUS RESET or a
selection from the host sending an ABORT or a BUS DEVICE RESET message terminates testing.
If the Block Size field is 0, the tape drive uses random block sizes.
The Block Count field specifies how many blocks to write/read starting first on track 0, then again on
track 1. So if the Block Size and Count fields result in 3 tracks worth of data, the test performs these
actions:
•
Write tracks 0, 1, 2
• Rewind, read, and verify tracks 0, 1, 2
• Write 3 tracks starting with 1: 1, 2, 3 and then rewind to the beginning of track 1 and do the read/
verify pass. If Block Count is 0, the tape drive writes data until it reaches EOT each time, which
yields almost 4 complete passes over the medium.
N
OTE
: As a result of data generation and verification, this test only streams the
medium for short periods of time. Therefore, if Block Count is very high,
this test can take many minutes or even hours to complete.
Table 4-65.
Definition of Pattern Numbers for the SEND DIAGNOSTIC Command
Pattern Name Data in Hex
0 Rotate (Rotate through the other 9 patterns,
change for each file)
1 All 0’s 00 00 00 00 00
2 2F FF FF FF FF FF
3 Alternating 1’s and 0’s 55 5A AA A5 55 5A AA A5
4 Marching 1 01 02 04 08 10 20 40 80
5 Marching 0 FE FD FB F7 EF DF BF 7F
6 MW 0E 0E 0E 0E 0E 0E 0E 0E
7 MFM DE AD DE AD DE AD DE AD
8 1F AA AA AA AA AA AA AA AA
9 Random Data Random