HP LTO Ultrium Technical Reference Manual page 24

LEDs Cause
Ready and Clean OFF. Drive Error and Tape
Error FLASHING.
The drive has failed to execute power-on self
test (POST).
Ready ON.
The drive is ready for operation.
Firmware is being reprogrammed.
Ready FLASHES twice, then pauses ON, then
FLASHES twice.
The drive is in OBDR mode.
Clean FLASHING. (Other LEDs may be on or
flashing.)
The drive requires cleaning.
Ready FLASHING and Clean ON. (Other
LEDs may be on or flashing.)
Cleaning is in progress.
Tape Error FLASHING. (Other LEDs may be
on or flashing.)
The drive believes the current tape or the tape
just ejected is faulty.
24 Front panel and LEDs
Action required
Power cycle or reset the drive.
If the condition reappears, call for service.
None. This is normal.
None.
If the drive is upgrading firmware, do not reset
or power cycle it.
If you need to exit OBDR mode, power cycle
or reset the drive.
NOTE:
OBDR is not supported in all versions of
the drive.
Load an LTO Ultrium Universal cleaning
cartridge to clean the heads. See
the drive" on page 59 for instructions.
If the Clean LED is still flashing when you load
a new or known data cartridge after cleaning,
call for service.
None. The cleaning cartridge will eject on
completion.
The cleaning cycle can take up to 5 minutes
.
Unload the tape cartridge. Make sure that it
is a valid format: an LTO Ultrium data
cartridge or LTO Ultrium Universal cleaning
cartridge.
Reload the cartridge. If the Tape Error LED still
flashes or starts flashing during the next
backup, load a new or known, good
cartridge.
If the Tape Error LED is now off, discard the
'suspect' tape cartridge. If it is still on, call for
service.
"Cleaning