SL500 - How do DEMs and CEMs Effect Cell Availability in Library

Asset ID:	1-71-1016135.1
Update Date:	2011-02-07
Keywords:

Solution Type Technical Instruction Sure

Solution 1016135.1 : SL500 - How do DEMs and CEMs Effect Cell Availability in Library

Applies to:

Sun StorageTek SL500 Modular Library System
All Platforms
Checked for relevance on 7-Feb-2011.

Goal

This document addresses how DEMs and CEMs effect cell availability in library.

Solution

Steps to Follow
How do DEMs and CEMs Effect Cell Availability in Library:

Question:

In answer to questions from the field on installing DEM and CEM in the same unit does position matter?

Answer: (per SL500 install manual and Library Engineering)

- When DEMs and CEMs are installed in the same library, the DEMs are above all of the CEMs.

Notes:

The following notes are factors that influence capacity:

1. When you add an expansion module below an existing module, you increase the capacity of the module directly above it by:

- Base module: +16 slots

- CEM (when another CEM is below it): +10 slots

- CEM (when a DEM is below it): +7 slots

- DEM: +7 slots

2. When a CEM is installed below a base module or DEM, the top two rows on columns 9, 10, and 11 of the CEM are not accessible (-6 slots because the tape drives prevent the hand from reaching the slots).

3. The lowest module in the rack requires installation of the floor. The floor limits the distance the robot can travel, which makes the bottom row(s) in the lowest module inaccessible:

- Base module: -16 slots

- DEM: -7 slots

- CEM (below another CEM): -16 slots (-10 slots on the lowest CEM, -6 slots on the CEM above it)

- CEM (below base module or DEM): -16 slots

Previously Published As STKKB65741

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