Tape Usage Log (30H) - Seagate Viper 200 Scsi Interface Manual

Page 48

Tape Usage Log (30h)

All parameters are one byte long. Each parameter is either zero to indicate the
corresponding condition has not occurred or one to indicate that the corresponding
condition has occurred. The log page is used in conjunction with Information
Exceptions Mode Page (1Ch) that controls the action taken by the drive when a flag
is set and sets various other control mechanisms of the Tape Alert system. A flag is
set whenever the condition for setting the flag exists. There are three types of flags,
Informational, Warning, and Critical. The type of flag depends upon the severity of
the condition that sets the flag. Flags are cleared on the following conditions:
•
At drive power on
•
When the TapeAlert Log page is read
•
When specified corrective action has been taken (such as using a cleaning
cartridge)
•
On a SCSI bus reset or bus device reset message
•
On Log Select reset (note that the recommended action on receiving Log Select
for the TapeAlert Log page is to reject the command with an error).
Additional information regarding the Tape Alert system is found in the SCSI-3 Stream
Commands (SSC) Standard and Tape Alert specification. The following is the list of
flags (parameters) supported by the drive.
Parameter Description
3 Hard Error
9 Write Protect
11 Cleaning media in drive
14 Unrecoverable snapped tape
15 Memory in Cartridge Failure
16 Forced Eject
17 Read Only Format
18 Tape Directory Corrupted on Load
20 Clean now
21 Clean periodic
22 Expired cleaning media
23 Invalid cleaning tape
30 Hardware A
31 Hardware B
32 Interface
34 Download Fault
51 Tape Directory Invalid at Unload
The Tape Usage Log Page returns information about the current tape cartridge.
These values are all read directly from the tape log. The Page Control, PC, field is
ignored and accumulated values are always returned.
Page Code
30h
Parameter Description
1
Thread Count
LTO SCSI Interface Manual
Type
Warning
Critical
Informational
Critical
Warning
Critical
Warning
Warning
Critical
Warning
Critical
Critical
Critical
Critical
Warning
Warning
Warning
Page Length
5Ah
Length
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Length
4