Reference Guide

Chapter 4 SCSI Commands
MODE SELECT (6) / (10) Command (15h / 55h)
DLT-S4 Interface Reference Guide 148
05h Set Drive Password and write it to all unprotected tapes. All unprotected
tapes will then automatically become password protected. This action sets
the APB and APD bits. The currently loaded tape, if it is unprotected, and
subsequent unprotected tapes loaded into the drive will become password
protected. If a tape is mounted and password protected, the value in the
password field must match the password on the tape. The password will
be written to the tape in conjunction with a
WRITE, WRITE FM, ERASE, or
UNLOAD command. Password protected tapes will not be modified by this
action code.
06h Remove Password from the tape. Tape must be mounted and the drive
password(s) must match the tape password(s). This action clears the APB,
APD, and the appropriate TPP bits. The drive password is not cleared from
drive memory.
07h Clear Drive Password. This action clears the APB, APD and corresponding
DPS bits, and the password from drive memory. If a password protected
tape is loaded, the appropriate PMM bit will be set. Password field is
ignored.
08 Set the Drive Password and write it to tape now. Tape must be mounted
and either have no password or the value in the password field must
match the password on the tape. Upon successful completion of the
MODE
SELECT
command, the password is written to tape, the TPP bit is set for
the interface(s) that just put a password on the tape, and the APB, APD,
PAX, and PWF bits are cleared.
09h-3Fh Reserved
Number of
Passwords
Supported
This read only four bit field indicates the number of passwords supported. This field is
currently set to two: one for the host interface and one for the automation interface.
However, this design can handle up to 8 passwords.
APB Auto Password Blank Tapes. This read only bit indicates password protection mode for
this password is set to auto-password protect all blank tapes.
APD Auto Password Unprotected Data Tapes. This read only bit indicates password protection
mode for this password is set to auto-password protect all unprotected/formatted tapes.
PA Password Accessible on this interface. This read only status bit indicates if this password is
accessible from this interface.
TPP Tape Password Protected. This read only bit indicates if this tape is password protected
with this password.
DPS Drive Password Set. This read only bit indicates if the drive has a password set for this
interface.
Field Description