Resetting Drives In A Library - HP LTO Ultrium Technical Reference Manual

To clean the heads:
1. Insert a cleaning cartridge into the drive. The tape drive automatically loads the cartridge and
cleans the heads.
If the cleaning cartridge ejects or returns to the ready-to-eject position immediately with the Tape
Error LED on, it has expired or it is not an LTO Ultrium cleaning cartridge (or is an older
unsupported LTO Ultrium cleaning cartridge). In this case, discard the cleaning cartridge and
repeat the operation with a new one.
The cleaning cycle can take up to 5 minutes, during which the orange 'Clean' LED will be on
steadily and the green 'Ready' LED will flash. When it has finished, the drive ejects the cartridge
or returns the cartridge to the ready-to-eject position.
2. Remove the cleaning cartridge from the drive.

Resetting drives in a library

The tape drive can be reset by the automation controller via the automation connector or by pulling
the ACI_RST_L line low (see
There are two levels of reset via the automation connector:
• ACI reset—resets the ACI port and all SAS/Fibre Channel ports
• Drive reset—equivalent to a power-on reset
Either reset method will interrupt the interface between the drive and host, and a reset may result in
no End of Data mark being written. As a result, it is strongly recommended that a reset command is
not sent unless all other recovery methods have failed. Note that certain automation commands (Load,
Unload, Set Drive Configuration, Reset and Set Baud Rate) can be queued behind outstanding SCSI
commands giving the impression that the drive has stopped responding over the ADI connector. (All
command packages will be still be ack'ed even though the command will be queued.)
Following a Reset command with reset control set to Drive Reset or after pulling the ACI_RST_L line
low, the drive will behave as if it has powered up and will go off bus and lose all automation connector
configurations.
An FCP reset will not affect the automation interface.
Note that following an upgrade of the drive firmware the drive will be reset as if it had been powered
up.
60 Operating the drive
"Automation interface" on page 70).