7.Drive Diagnostics
7-8
SONY AIT-E Turbo drive SDX-250V series Ver.1.0
Table 7-6: WRT & RD control bits
WRT
RD
Action
0
0
1
1
0
1
0
1
Command rejected - invalid parameters
Read
Fast Search to initial position (conditional on Loop Count)
Repeat until loop count = 0
Write Set-mark
Write test pattern
Write EOD at end of first pass
Fast search to initial position (conditional on loop count)
Repeat until loop count = 0
Write Set-mark
Write test pattern
Write EOD at end of first pass
Fast search to initial position
Read
Fast Search to initial position (conditional on loop count)
Repeat until loop count = 0
At the completion of the test, the tape will be positioned after the last group written or read and before EOD.
NLR:
0-Drive Log will be initialized before the test
1-Drive Log will not be initialized
Group Count:
This defines the number of groups to be written to or read from the tape.
0-Write until EOT or Read until EOD/EOM
>0-Write until count is exhausted or EOM, Read until count is exhausted or EOD/EOM.
If EOM is encountered during Write, EOD will not be written.
In all cases, encountering EOM will be recorded as a hard error. The Diagnostic result for the Error Rate Test will be
as shown in the table below.
Table 7-7: Error Rate Test results
Bit
Byte
7 6 5 4 3 2 1 0
0
Reset
Error
Tine
Re-Sync
Reserved Error
Set
1
Error Code
2
(MSB)
Actual Group Count
3
(LSB)
4
Diagnostic Test Number (02h)
This test will result in a loss of logical tape position and therefore a load should be sent before the drive is used for
any normal reads or writes.
