Reference Guide

Chapter 4 SCSI Commands
Use of DLTSage WORM Tapes
DLT-S4 Interface Reference Guide 350
Responding to DLTSage
WORM Sense Data and
DLTSage WORM
TapeAlerts
1
TheDLTSage WORM TapeAlerts are as follows:
0x3B – WORM Medium Integrity Check Failed
The tape drive has detected an inconsistency during WORM medium
integrity checks.
Detection — The application will receive a WORM Integrity Check Failed
Tape Alert (0x3B) after the cartridge is loaded.
Recovery — The recommended recovery action is to copy all the data
from the problem DLTSage WORM cartridge to a new DLTSage WORM
cartridge.
0x3C – WORM Medium - Overwrite Attempted
An attempt has been made to overwrite user data on a WORM medium.
Detection — The application will receive a Check Condition with the
following sense data:
•
Sense Key — Data Protect (07)
•
Additional Sense Code — Write Append Error (0x50)
•
Additional Sense Code Qualifier — DLTWorm Write Append Error
(0x95)
Recovery —
1 If the WORM medium was used inadvertently, replace it with a
normal data medium.
2 If the WORM medium was used intentionally, check that the software
application is compatible with the WORM medium format that you
are using.
3 If you consistently get this error and the cause is not #1 or #2, then the
recovery action is to copy all the data from the problem DLTSage
WORM cartridge to a newDLTSage WORM cartridge.
Failure Modes and
Recovery Actions
1
Loss of Directory or MAM due to Read Failures
In the event the standard directory or MAM data is not readable, the
drive may still be able to recover the user data and thereby reconstruct
these directories from a user data point of view. The drive firmware will
be able to detect all cases of this failure mode, write protect the medium,
and allow full recovery of the user data from the tape.