Hitachi Unified Storage VM, Product Overview Manual

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Hardware overview
2–5
Hitachi Unified Storage VM Product Overview Guide
Drive boxes
The Unified Storage VM storage system can be configured in many ways,
starting with a one-rack, diskless system to a large, three-rack system that
includes a controller chassis and up to 48 standard drive boxes or up to 24
dense drive boxes. Standard and dense drive boxes can be intermixed in a
Unified Storage VM system to meet specific storage requirements. More
detail about the drive boxes is provided in the Hitachi Unified Storage VM
Block Module Hardware User Guide .
• DBS (D rive B ox, S mall form factor drives). This drive box can contain
up to 24 vertically mounted. 2-1/2-inch HDD or SDD drives.
• DBL (D rive B ox, L arge form factor drives). This drive box can contain
up to 12 horizontally mounted. 3-1/2-inch HDD or SDD drives.
• DBF (D rive B ox, FMD drives). This drive box can contain up to 12
horizontally mounted. 5-1/4-inch Flash module drives.
Figure 2-3 Controller chassis, front (above) and rear (below)