Seagate Viper 200, Scsi Interface Manual

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48
LTO SCSI Interface Manual
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 Type Length
3 Hard Error Warning 1
9 Write Protect Critical 1
11 Cleaning media in drive Informational 1
14 Unrecoverable snapped tape Critical 1
15 Memory in Cartridge Failure Warning 1
16 Forced Eject Critical 1
17 Read Only Format Warning 1
18 Tape Directory Corrupted on Load Warning 1
20 Clean now Critical 1
21 Clean periodic Warning 1
22 Expired cleaning media Critical 1
23 Invalid cleaning tape Critical 1
30 Hardware A Critical 1
31 Hardware B Critical 1
32 Interface Warning 1
34 Download Fault Warning 1
51 Tape Directory Invalid at Unload Warning 1
Tape Usage Log (30h)
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 Page Length
30h 5Ah
Parameter Description Length
1
Thread Count
4