User guide

Specifications A–3
Hitachi Unified Storage VM Block Module Hardware User Guide
Table A-2: Drive Specifications
Power requirements
(see Table A-4: HUS VM
electrical specifications,
single phase current on
page A-5 and Table A-
5: HUS VM electrical
specifications, three
phase current on page A-
6 for details)
Single phase to storage system
components.
Single or three phase to PDU input.
60Hz : 200V to 240V
50Hz : 200V to 240V
Acoustic level Operating, Controller Chassis 60dB (24ºC or less), 62dB (32ºC)
Operating, DBS / DBX 54dB (24ºC or less), 60dB (32ºC)
Standby, Controller Chassis 60dB (24ºC or less), 62dB (32ºC)
Standby, DBS / DBX 54dB
Notes:
1. When 300 GB is mounted
2. All FED configuration, no BEDs (diskless system)
3. Zero BEDs in a diskless configuration, two BEDs min if drives are installed
Drive Type Size (inches)
1
Drive Capacity Speed (RPM)
HDD (SAS)
n/a
3-1/2 3 TB 7,200
2-1/2 600 GB, 900 GB 10,000
SSD (Flash)
MLC SAS 2
2-1/2 200 GB, 400 GB
Flash Module (MLC) 5-1/4 1.6 TB n/a
Minimum Number of Drives
Four (two in upper half of drive box, two in lower half of drive box). Drives must be added four at a
time to create RAID groups, unless they are spare drives.
Maximum Number of Drives
Drive Type
(inches)
Drive Box Max per drive box Max Per system
HDD, 3-1/2 DBX (dense) 48 1,152
HDD, 2-1/2 DBS 24 1.152
HDD, 3-1/2 DBL 12 1.152
FMD, 5-1/4 DBF 12 96
SSD, 2-1/2
128
2
24 (DBS) or 48 (DBX)
128
3
Spare drives
4
64
Notes.
1. the dense drive box uses only 3-1/2 in. drives. The DBL (LFF) drive box uses 3-1/2 in. drives. The
DBS (SFF) drive box uses 2-1/2 in. drives.
2. SSD drives can be mounted all in one drive box or spread out among all of the drive boxes in the
storage system.
3. Recommended maximum number.
4. Recommended number of spare drives: one spare drive per set of 32 HDDs and one per set of 32
SSDs.
Item Specifications