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Chapter 4 SCSI Commands
MODE SENSE (6) / (10) Command (1Ah / 5Ah)
DLT-S4 Interface Reference Guide 177
Table 99 Device Configuration
MODE SENSE Page — Field
Descriptions
Field Description
PS Parameters Savable. Always set to 0.
SPF SubPage Format. Always set to 0. Indicates that this page uses the page_0 page
format.
Page Code Identifies the type of
MODE SENSE page being transferred. A value of 10h
identifies this as the Device Configuration page.
Page Length Indicates the number of bytes in the page, excluding bytes 0 and 1.
CAF Change Active Format. Not supported.
Active Format Not supported.
Active Partition Indicates the current logical partition number in use. Always set to 0. The drive
only supports partition 0.
Write Buffer Full
Ratio
Indicates how full the buffer should be before the drive restarts writing to the
medium. The drive sets this field to 0 (unused) since it uses an automatic adaptive
mechanism to adjust its ratio dynamically according to the average data rates.
Read Buffer Empty
Ratio
Indicates how empty the buffer should be before the drive restarts reading from
the medium. The drive sets this field to 0 (unused) since it uses an automatic
adaptive mechanism to adjust its ratio dynamically according to the average data
rates.
Write Delay Time Indicates the maximum time in 100 msec increments that the drive waits with a
partially fully buffer before forcing the data to tape. Note that the buffer full /
empty ratio, which is dynamic, can cause the drive to write data sooner than the
WRITE delay time value indicates. The WRITE delay time defaults to 100 (64h).
This causes the drive to flush the buffer after 10 seconds. The minimum value is 15
(Fh), the maximum value is 6500 (1964h), representing a range in delay of 1.5
seconds to 11 minutes.
DBR Data Recovery. Always set to 0.
BIS Block Identifiers Supported. This bit is supported and is always set to 1.
RSmk Report Setmark. Always set to 0.
AVC Automatic Velocity Control. Always set to 0.
SOCF Stop on Consecutive Filemarks. Always set to 0.