Introduction
1–11
Hitachi VSP User and Reference Guide
Table 1-2 Drive Specifications
System capacities with flash modules
The following table lists the VSP system storage capacities when using flash
modules.
Table 1-3 System capacities with flash modules
Drive Type Size (inches)
1
Drive Capacity Speed (RPM)
HDD (SATA) 3-1/2 3 TB 7,200
HDD (SAS)
200 GB, 400 GB
n/a
2-1/2 146 GB, 300 GB 15,000
SSD (Flash)
2
2-1/2
Flash module 5.55 x 12.09 x 0.78 1.6 TB, 3.2 TB n/a
Minimum Number of Drives
Four HDDs or SSDs per controller chassis (two in upper half, two in lower half). HDDs or SSDs must be
added four at a time to create RAID groups, unless they are spare drives. The minimum number of
operating flash modules is four, one in each of the four flash boxes in the flash chassis. Spares are
additional.
Maximum Number of Drives
Drive Type
(inches)
Drive Chassis Single Module
(3-rack system)
Dual Module
(6-rack system)
HDD, 3-1/2 80 640 1280
HDD, 2-1/2 128 1024 2048
SSD, 3-1/2
80
2
128
3
256
3
SSD, 2-1/2
128
2
128
3
256
3
Flash module 48
96
4
192
Notes.
1. Each drive size requires its own chassis. Drive sizes cannot be mixed in a single chassis.
2. SSD drives can be mounted all in one drive chassis or spread out among all of the chassis in the
storage system.
3. Recommended maximum number.
4. Flash modules are not the same form factor as HDDs or SSDs and require a flash box and flash
chassis. See System Components on page 3-1.
Considering hot sparing requirements
R1 R5 R6
2D+2P 4D+4P 3D+1P 7D+1P 6D+2P 14+2P
Single flash chassis, max. capacity
1.6 GB Raw 70.4 64.0 70.4 64.0 64.0 51.2
Usable 35.2 32.0 52.8 56.0 48.0 44.8
3.2 GB Raw 140.8 128.0 140.8 128.0 128.0 102.4
Usable 70.4 64.0 105.6 112.0 96.0 89.6
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