Exp3512 And Exp3524 - IBM System Storage DS3500 Introduction And Implementation Manual

7914DS3KIntro_081410alw.fm
Figure 2-9 Controller module with optional FC host interface daughter card
Note: Only one type of optional interface can be added to any one DS3500 storage server.
Mixing interface daughter cards between controllers in the same DS3500 is not supported.
Disk drives
The most important difference between the DS3512 and the DS3524 product models and
their equivalent expansion models are the hard disk that are supported with them. The
difference starts with the physical drive size and extends to their speeds and storage
capacities. The DS3512 and EXP3512 support twelve drive in the 3.5 inch format; the
DS3524 and EXP3524 supports twenty four drive in the 2.5 inch format. The disk drives are
installed at the front, as shown above in Figure 2-2 on page 15 and Figure 2-3 on page 15.
Available drive types for each of these subsystems are shown below in Table 2-1.
Table 2-1 DS3500 families HDD support
Drives Supported
SAS 15KRPM
SAS 15KRPM SED
SAS 10KRPM
SAS 10KRPM SED
Nearline SAS
7.5KRPM
Maximum drives
Storage system
capacity (max)
Note: In DS3500 family, you can add a mix of EXP3512 or EXP3524 expansion units to
attain a maximum capacity of 190TB per subsystem.

2.3 EXP3512 and EXP3524

The EXP3512 and EXP3524 expansion subsystems allow for the growth of the DS3500
storage subsystem up to the 96 drive maximum, by adding either the twelve or twenty four
drive chassis to the storage server's SAS drive expansion port. Any mix of the expansion
models can be added up to the maximum allowed drive count. The EXP3512 and EXP3524
differ from the DS3512 and DS3524 in that in place of the controller module they are
equipped with an Environmental Services Module (ESM). As with the DS3500 controllers the
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IBM System Storage DS3500: Introduction and Implementation Guide
Draft Document for Review March 28, 2011 12:24 pm
DS3512/EXP3512 DS3524/EXP3524
300GB, 450GB, 73GB, 146GB
600GB
600GB None
None 300GB
None 300GB
1TB, 2TB 500GB
12/96 24/96
450 GB SAS / 1 TB 450 GB SAS / 1 TB
SATA SATA