Appendix A Library Size Library Size Calculation Examples; Library Size Calculation Examples - Quantum ATL StackLink Installation Instructions Manual

Appendix A Library Size

Library Size Calculation Examples

Library Size Calculation Examples
90
The library size reflects the approximate number of cartridge slots in the
multiple library stack. This number is calculated using the following
formula:
Library size = L x C
Where:
• L = the number of levels between the top of the StackLink and the
lowest library module installed
An ATL M1500 has one level of magazines and so is counted as 1
level. An ATL M2500 has four levels of magazines and so is counted
as 4 levels.
If there is a gap between the top of the StackLink and the lowest
library module installed that is large enough to fit an ATL M1500, the
firmware determines the maximum number of levels that would fit
into the gap, and adds that number of levels to the total.
The method of analyzing the number of levels of the gap
Note:
varies, depending on whether the multiple library stack
contains an ATL M2500 (see
on page 92).
• C = the number of cartridge slots in each level
In DLT and SDLT libraries, one level is considered to contain 20
cartridge slots (2 magazines with 10 cartridge slots per magazine).
In LTO libraries, one level is considered to contain 25 cartridge slots
(2 magazines with 12 cartridge slots per magazine, and 1 fixed slot).
The fixed slot is not included in the calculation of cartridge
Note:
slots for DLT and SDLT libraries. This is so the library size
will calculate to a round number.
Figure 62 provides some examples of how the library size is calculated.
ATL StackLink™ Installation Instructions
Library Size in Mixed Stacks
1