Flexible Back-End Director Installation; Drive Chassis - Hitachi G1500 Hardware Manual

The hardware components used in the standard back-end director blades are different
from the encrypting back-end director blades. A BED pair may not consist of one
standard and one encrypting blade.

Flexible back-end director installation

Use the following guideline when installing standard and encrypting back-end directors
(BED).
A maximum of two BEDs can be installed in both the primary controller chassis and
secondary controller chassis for a total of four BEDs per system. Only one type of BEDs
can be installed into a system. The standard and encrypting back-end directors cannot be
mixed in the storage system. The maximum number of BED pairs that can be installed
into a controller chassis will depend on the number of FEDs that will also be installed
into the controller chassis.
A system without internal drives (also known as a diskless configuration) does not require
the installation BEDs. However, the system must include one or more FED pairs to
provide ports to connect to externally attached storage as well as to host systems.
For more information about configuration rules for FEDs and BEDs, see
end director installation (on page 41)

Drive chassis

The VSP G1x00 support three different drive chassis. The VSP F1500 only supports the
FMD chassis. All components in the drive chassis are configured with redundant pairs to
prevent system failure. While the storage system is in operation, all components in the
drive chassis can be added or replaced. For detailed information about the drives in each
chassis, see
Drive
chassis
SFF A 16U group of eight 2U
drive trays. Each holds up
to 24 vertically positioned
2.5-inch HDD and SSD
drives, for a total of 192 SFF
drives per chassis. See
Figure 29 SAS connection
diagram of Rack-00
(SFF/LFF standard model)
(on page 109)
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide
Storage system specifications (on page 131)
Description
.
Chapter 2: Storage system hardware overview
Flexible back-end director installation
.
.
Maximum number of chassis /
Drive trays / Single
Drives per controller (3
tray racks)
Eight 2U 6 / 1,152 hard
trays, up to drives
24 drives
Up to 192
each
SSDs
Up to 1,152
SSDs
Flexible front-
drives per system
Dual controller
(6 racks)
12 / 2,304
drives
Up to 384
1 1
SSDs
Up to 2,304
2 2
SSDs
46