Hitachi Unified Storage VM, Руководство по обзору продукта

Страница: 33 / 70

Hardware overview
2–9
Hitachi Unified Storage VM Product Overview Guide
File module storage system
The HUS VM file module (also called the Hitachi NAS system) consists of the
following hardware units.
• One or more servers which contain the control logic, processors,
memory, and interfaces to the HNAS data drives
• One or more system management units
All system components are mounted in either a standard Hitachi Data
Systems 19-inch, 42U rack, or a customer-supplied rack that meets the rack
specifications listed in the Hitachi Unified Storage VM Block Module
Hardware User Guide .
The following sections provide descriptions and illustrations of the HUS VM
block module storage system and its components.
File module server
The server includes the logical components, memory, fibre channel
interfaces, and Ethernet interfaces. The server contains dual mirrored data
drives to store file module system data, a battery pack that, in the event of
a power outage, preserves data that has not been written to disk for up to
72 hours, and fans to keep the server cool and operating efficiently.
Typically, the file module is placed in the middle or upper portion of a rack,
because fully populated drive boxes are significantly heavier than the
complete file module chassis.
The following illustration shows the front and rear views of the file module
server.
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.. The DBF drive box uses only 5-1/4 in. flash module 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.
Drive Type Size (inches)
1
Drive Capacity Speed (RPM)