User's Manual

DLT2000 SCSI Interface
8-118 DLT2000/DLT2700 Cartridge Tape Subsystem
Table 8-8 Definition of Pattern Numbers
Pattern Name Data in Hex
0 Rotate (Rotate through the other 9 patterns,
change for each tape 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
If the Max Number of Passes is zero, this indicates to loop forever. A BUS Reset or a
selection from the host sending an Abort or a Bus Device Reset message will terminate
testing.
If the Block Size field is set to zero, random block sizes will be used.
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 will:
• Write tracks 0, 1, 2
• Rewind, read, and verify 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 set to zero, data will be written until
EOT is reached each time, so almost 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. Therefore, if Block Count is set very high,
this test can take many minutes or even many hours to complete.
____________________________________________________________
If the specified test passes, a GOOD STATUS is returned. Otherwise, a Check
Condition is generated, and the Sense Data will contain information about the failure.