DLT1/VS80 SCSI Interface Guide
81-81276-01 Rev A01
July 2004
4-81
CAP, CAF, Active
Format
These fields are not supported and are 0.
Active Partition
Only partition 0 is supported.
Write Buffer Full Ratio
and Read Buffer Empty
Ratio
The tape drive sets these fields to 0 (unused). The tape drive uses an automatic,
adaptive mechanism to adjust its full/empty ratios dynamically according to the
average data rates over the SCSI bus.
Write Delay Time
This field indicates the maximum time that the tape drive waits with a partially full
buffer before forcing the data to medium (in 100 ms increments). Note that the
buffer full/empty ratio, which is dynamic, can cause data to be written sooner than
the Write Delay time would indicate. The Write Delay Time defaults to 200 (C8h),
causing the buffer to be flushed in 20 seconds. The maximum value is 6500
(1964h), while the minimum is 15 (0Fh) representing delays from almost 11
minutes down to 1.5 seconds.
DBR
Data Buffer Recovery. Set to 0 (Data buffer recovery not supported)
BIS
Block Identifiers Supported. Set to 1 (Block Identifiers Supported in media
format).
RSmk
Report Setmark. Set to 0 (Setmarks are not supported).
AVC
Automatic Velocity Control. Set to 0.
SOCF
Stop on Consecutive Filemarks. Set to 0.
RBO
Recover Buffer Order. Set to 0.
REW
Report Early Warning. S
et to 0 (Do not report Early Warning EOM on reads).
Gap Size
This field is not used and is always 0.
EOD Defined
End of Data. This field is 0.
EEG
Enable EOD Generation. When set, the Enable EOD Generation bit indicates that
the tape drive generates an EOD. The tape drive generates an EOD mark before
any change of direction following a write type operation.
SEW
Synchronize at Early Warning. The Synchronize at Early Warning bit is 1.
Buffer Size at Early
Warning
Buffer Size at EW fields are not supported and are 0.
Select Data
Compression
Algorithm
A setting of 1 enables data compression, 0 disables it.
Table 4-48.
Device Configuration Page — Field Descriptions
(Continued)
Field Name
Description
Summary of Contents for DLT1/VS80 SCSI
Page 1: ...DLT1 VS80 SCSI Interface Guide...
Page 6: ...DLT1 VS80 SCSI Interface Guide vi July 2004 81 81276 01 Rev A01 Notes...
Page 12: ...Table of Contents xii July 2004 81 81276 01 Rev A01 Notes...
Page 16: ...List of Figures xiv July 2004 81 81276 01 Rev A01 Notes...
Page 20: ...List of Tables xviii July 2004 81 81276 01 Rev A01 Notes...
Page 24: ...Chapter 1 Introduction 1 4 July 2004 81 81276 01 Rev A01 Notes...
Page 32: ...Chapter 2 General SCSI Bus Operation 2 8 July 2004 81 81276 01 Rev A01 Notes...
Page 42: ...Chapter 3 SCSI Messages 3 10 July 2004 81 81276 01 Rev A01 Notes...
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