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Library Partitioning and Element Addressing

Library 4U systems with firmware versions of .80 and higher, and containing at

least 2 drives, have the ability to configure two logical libraries (create two

partitions). This partitioning has been expanded with the new library firmware and

half-high drive integration. Now it is possible to configure 1, 2, 3 or 4 partitions in

the 4U library. Additionally the 2U library can now be configured into one or two

partitions. Each library must contain at least one drive per logical library

(partition). In a partitioned library, the Operator Control Panel (OCP) only reports

the status of logical library 1 in the main menu due to space limitations. The user

must navigate to the logical libraries status in the OCP to get the information on

the additional library partitions.

Partitioning of 2U Libraries

When two half height drives are installed in a 2U library, the library firmware will

support partitioning in the same way that the 4U supports partitioning with two

full height drives today. The first partition will contain the first magazine and the

first drive. The second partition will contain the second magazine and the second

drive. The I/O station (if configured as I/O) will be shared, as is done with the

partitioned 4U library.

One full height drive is ″Drive 1″. When using half height drives, the first half

height drive position will be called ″Drive 1″, The second half height drive position

will be called ″Drive 2.″

Partitioning of 4U Libraries

When one or more half height drives are added to a 4U library, the drive naming

will change. Currently, the first full height drive is ″Drive 1″ and the second full

height drive is ″Drive 2″. When you consider that each full height drive slot may

contain one or two half height drives, there are four potential drives in the space

that used to occupy two. As a result, the first half height drive position, or the first

full-high drive position, will be called ″Drive 1″. The second half height drive

position will be called ″Drive 2″. The third half height drive position, or the second

full height drive position, will be called ″Drive 3″. The fourth half height drive

position will be called ″Drive 4″.

Mixing of Drives

The library will support a mix of full height and half height drives in the same

physical library and the same logical library. They will support a mix of Gen 3 and

Gen 4 drives in the same physical library and the same logical library. They will

also support a mix of SCSI, SAS, and Fibre Channel in the same physical library

and the same logical library; however, mixing drive interface types in the same

logical library is not recommended.

Configuration of a 1 Partition System

A one partition system configured for a 4U library contains any and all drives

present in any drive positions, and it will contain all four magazines.

Chapter 3. Installation Planning 3-3

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Dell TL2000 Bedienungsanleitung Seite 43