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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.
a77ug161
Drive 3
258
Element Address
Drive 2
257
Element Address
Drive 1
256
Element Address
Drive 2
257
Element Address
Drive 1
256
Element Address
Drive 3
258
Element Address
Drive 4
259
Element Address
Drive 3
258
Element Address
Drive 1
256
Element Address
Drive 1
256
Element Address
Drive 2
257
Element Address
Magazine
1
Magazine
2
Magazine
3
Magazine
4
Front side
Drive 4
259
Element Address
Figure A-1. Configuration of a One Partition System
Appendix A. SCSI Element Types and Addresses A-3
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