Dell PowerVault 160T LTO2 (Tape Library) - Manual (Page 7)

Introduction: Dell PowerVault 160T Tape Library User's Guide
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The power system consists of the following:
Power supply
Power distribution unit (PDU)
AC power cord
A single power switch, located on the front door, turns on and off all power for the control module and attached expansion
modules. Each PDU has a second circuit breaker, located in the rear of the module, that controls the module power supply
output. The power supply has three LEDs that provide status information. The power system also has four fuses for system
protection.
Expansion Modules
Expansion modules allow the library to expand to accommodate additional tape drives and cartridge capacity. Each expansion
module adds up to 360 LTO storage slots depending on the number of tape drives ordered and if an optional I/E station is
installed, see Figure 4 . Capacity varies by drive type. The library's maximum configuration includes up to three expansion
modules.
The expansion module can accommodate the following functional units:
Tape drives
Cartridge storage cells
I/E station (optional)
Redundant AC power compartment
Power supplies are not required in the expansion module unless the expansion module has tape drives. If an expansion
module contains only cartridges, all power is derived from the control module.
Figure 4. Expansion Module
Host Attachment
Requests issued from the host application result in cartridge movement in the library. The primary requests issued are for
mounting and dismounting cartridges in and out of the tape drives and for importing and exporting cartridges in and out of
the library. The library manages the physical location. In addition to requesting cartridge movement in the library, the host
application can obtain status, configuration information, and cartridge storage information stored in the library.
Hosts can be directly attached to drives or they can be attached to a switch, which is then attached to the drives.