Configuring autoload and library-controlled loads
HPE LTO Ultrium tape drives can be configured so that loads either occur automatically or under the
control of the library. A SCSI MODE SELECT command can set the Autoload field to do this. The field is
byte 5, bits 0-2 of the Control Mode page, 0Ah.
If the Autoload field = 0, Autoload is set and the drive automatically loads a cartridge when it is inserted
and threads the tape so that it is ready for use.
If the Autoload field = 1 or 2, the drive pulls the cartridge into the drive but does not thread the tape. In
this position, the LTO-Cartridge Memory can be read. The drive requires a Load command to thread the
tape and make it ready for use.
Cartridge positions during load and unload
The following diagram shows the positions of importance during load and unload.
Figure 8: Load and unload positions for half-height drive
Parameter Specification
Distance from drive front mounting data to rear of
cartridge when cartridge is ejected and locked
Note: nominal bezel thickness is 5 mm.
73.35 +2.34/-2.29 mm
Distance from drive front mounting data to rear of
cartridge when cartridge is loaded to the position
of soft load initiation.
73.35 +1.22/-2.29 mm
Force required to insert the cartridge 1000 gf
Cartridge load to LTO-CM data available time 10 sec
Maximum force that can safely be applied to
cartridge during load
1500 gf max
Force required to extract a cartridge 250 - 750 gf
Time delay from cartridge lock to loader start.
1
200 msec min
1
Cartridge lock is when the cartridge is inserted and retained by the drive.
Load scenarios
The following scenarios describe the operation during the various types of load.
Load scenario 1: Autoload
1. The library sends a command to enable Autoload. It is only necessary after a drive power-on.
2. The host sends a Move Medium command to the robotics.
Configuring autoload and library-controlled loads 57
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