Cartridge Expansion Module (Cem); Access Expansion Module (Aem); Dem Rear View - Oracle StorageTek SL3000 Manual

Library Modules
Figure 1–3 DEM Rear View
Figure Legend:
Tape drives
1.
Drive DC power supplies
2.
Ethernet switches (optional)
3.
Power distribution unit
4.

Cartridge Expansion Module (CEM)

The CEM provides additional cartridge storage. There are no tape drives present
within this module. CEMs on the end of the library can be converted to PEMs (see
"Parking Expansion Module (PEM)"
supported in a single library. The initial CEM should be installed to the right of a Base
module, then a second to the left of the DEM/Base module, a third to the right, and
the fourth one to the left, and so on. This alternating method maximizes library
performance.
CEM Configuration Options
438 to 620 cartridge capacity (see
■
CAP (optional). See
■
Placement to the left or right of a Base module and DEM
■
A maximum of four CEMs on each side of centerline (eight total)
■

Access Expansion Module (AEM)

An AEM has a large cartridge access door used for bulk loading and unloading of up
to 234 cartridges. Additionally, a library with two AEMs supports the redundant
1-4 StorageTek SL3000 Library Guide
on page 1-5). A maximum of eight CEMs are
"Calculating Physical Capacity"
"Rotational Cartridge Access Port (CAP)"
on page 1-17).
on page 1-7.