M2488 PRODUCT GUIDE ERPA CODES

April 1997 CG00000-011503 REV. A C-1

APPENDIX CERPA CODES

The ERPA codes are described in Table C-1. These are the ERPA codes returned in byte 19 of the error

code sense formats or described in paragraph 8-3.1 on page 8-4.

Table C-1. ERPA Codes

ERPA
CODE DESCRIPTION ERROR
22 Path Equipment
Check Drive adapter error occurred.
Could not recover from a buffer error on the lower interface.
Could not recover from an error detected during a cartridge index/load cycle on the
Automatic Cartridge Loader. The cartridge is manually retrievable by the operator.
23 Read Data Check A permanent read error has occurred.
24 Display Check A Display command was received while a drive check message is displayed.
25 Write Data Check Buffered data could not be written on the tape successfully. ERP has tried to erase gaps
and rewrites but could not complete the write operation.
A permanent error occurred when trying to write data, an IBG or a tape mark on the
tape. All attempts to retry the operation have been completed, but unsuccessfully.
26 Attempt to read back-
ward an EDRC packet Host recovery should perform a read forward followed by a backspace block com-
mand.
27 Command Reject An undefined command op code has been issued.
Control information is improper.
28 Write ID Mark Check The ID mark could not be written successfully at the BOT. Any data to be written to
the drive is still in the buffer.
2A Buffered Log Data
Present The statistical counters have overflowed and a Request log command should be issued
2C Permanent Equip-
ment Check Either the control unit cannot recover because an error occurred in the subsystem hard-
ware or microprogram, or the control unit recovery action was unsuccessful.
2D Data Security Erase
Command Failure The drive became not ready after the command was issued, or an error occurred while
the command was processing.
2E Not Capable (BOT
error) Either a density mark could not be read correctly or the Block ID read by the control
unit is invalid (Bit 0 or bits 8-11 are not zero).
If a density mark could not be read correctly, likely causes are:
1. a void occurred at BOT, or
2. a timeout occurred before the density separator was detected.
30 File Protected A write type operation was attempted on a tape cartridge that is file protected.
31 Tape Void No patterns or data were found on the tape during a read operation. The tape could be
positioned after the last data block or tape mark that was written on the tape.
32 Load Assistance An error caused the drive to lose tape tension.
33 Load/Unload Failure The cartridge is not inserted or threaded correctly.
34 Manual Unloaded The drive cannot maintain tape tension and control tape movement during an unload
operation.