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

The hardware components used in the standard back-end director blades are dierent
from the encrypting back-end director blades. A BED pair may not consist of one
standar
d and one encrypting blade.
Flexible back-end director installation
Use the follo
wing guideline when installing standar
d and encrypting back-end dir
ectors
(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 conguration) 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 conguration rules for FEDs and BEDs, see
Flexible front-
end director installation (on page 41) .
Drive chassis
The VSP G1x00
support thr
ee dierent drive chassis. The
VSP F1500
only supports the
FMD chassis. All components in the drive chassis are congured 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
Storage system specications (on page 131) .
Drive
chassis Description
Drive trays /
Drives per
tray
Maximum number of chassis /
drives per system
Single
controller (3
racks)
Dual controller
(6 racks)
SFF A 16U group of eight 2U
drive tr
ays. 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) .
Eight 2U
tr
ays, up to
24 drives
each
6 / 1,152 har
d
drives
Up to 192
SSDs
1
Up to 1,152
SSDs
2
12 / 2,304
drives
Up to 384
SSDs
1
Up to 2,304
SSDs
2
Flexible back-end director installation
Chapter 2: Storage system hardware overview
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide 46