Chapter 4 SCSI Commands
MODE SENSE (6) / (10) Command (1Ah / 5Ah)
DLT-S4 Interface Reference Guide
200
Table 111 Medium
Configuration Mode Page —
Field Descriptions
Field
Description
PS
Parameters Savable. For
MODE SELECT
, must be 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 SELECT
page being transferred. A value of 1Dh
identifies this as the Medium Configuration Mode Page.
Page Length
Indicates the number bytes in the page, excluding bytes 0 and 1.
WORMM
The
WORM
mode (
WORMM
) bit is set to one when the device server is operating in
WORM
mode. The
WORMM
bit is set to zero the current medium is not a WORM
medium. This bit is not changeable with a
MODE SELECT
command.
WORM MODE
LABEL
RESTRICTIONS
The field specifies the restrictions against overwriting format labels when operating
in
WORM
mode. A series of filemarks with no interleaved logical blocks immediately
preceding EOD is treated as a filemark sequence and is controlled by the
WORM
MODE FILEMARKS RESTRICTIONS
field.
The DLT-S4 supports only a setting of 00h indicating that it will not allow any logical
blocks to be over-written on a
WORM
medium.
WORM MODE
FILEMARKS
RESTRICTIONS
The
WORM MODE FILEMARKS RESTRICTIONS
field specifies the restrictions against
overwriting a series of filemarks immediately preceding EOD when operating in
WORM
mode. The
WORM MODE FILEMARKS RESTRICTIONS
field controls only the
overwriting of a series of filemarks with no interleaved logical blocks immediately
preceding EOD.
The DLT-S4 supports only a setting of 03h indicating that it will allow any number of
filemarks immediately preceding EOD to be over-written.