Hitachi Universal Storage Platform VM - Manual (Page 37)

Architecture and Components 2-11
Hitachi Universal Storage Platform V/VM User and Reference Guide
Disk Drives and Flash Drives
The Universal Storage Platform V/VM supports high-speed disk drives and
flash drives with ultra-high-speed response. The drives use fixed-block-
architecture (FBA) format.
Table 2-3 lists and describes the supported disk and
flash drives: 73 GB, 146 GB, 200 GB, 300 GB, 400 GB, 450 GB, 750 GB, 1 TB.
Table 2-3 Disk Drive and Flash Drive Specifications
Type Capacity Formatted
Capacity*
Revolution
Speed
Interface Interface Data Transfer Rate
(maximum)
Disk 73 GB 71.50 GB 15,000 rpm FC 400 MB/s
Flash 73 GB 71.50 GB n/a FC 400 MB/s
Disk 146 GB 143.76 GB 15,000 rpm FC 400 MB/s
Flash 146 GB 143.76 GB n/a FC 400 MB/s
Flash 200 GB 196.92 n/a FC 400 MB/s
Disk 300 GB 288.20 GB 10,000 rpm FC 200 MB/s
Disk 300 GB 288.20 GB 15,000 rpm FC 400 MB/s
Disk 400 GB 393.85 GB 10,000 rpm FC 400 MB/s
Disk 450 GB 440.57 GB 15,000 rpm FC 400 MB/s
Disk 750 GB 738.62 GB 7,200 rpm SATA 300 MB/s
Disk 1 TB 984.82 GB 7,200 rpm SATA 300 MB/s
* The storage capacity values for the data drives (raw capacity) are calculated based on the following
values: 1 KB = 1,000 bytes, 1 MB = 1,000
2 bytes, 1 GB = 1,000 3 bytes, 1 TB = 1,000 4 bytes.
Each data drive can be replaced non-disruptively on site. The USP V/VM
utilizes diagnostic techniques and background dynamic scrubbing that detect
and correct drive errors. Dynamic sparing is invoked automatically if needed.
For an array group of any RAID level, any spare drive can back up any other
drive of the same rotation speed, the same data transfer rate, and the same
or lower capacity anywhere in the storage system, even if the failed drive and
the spare drive are in different array domains (attached to different BED
pairs).
The USP V can be configured with up to 40 spare drives, and the USP VM can
be configured with up to 16 spare drives. The standard configuration provides
one spare drive for each type of drive installed in the storage system. The
spare drives are used only as replacements and are not included in the storage
capacity ratings of the storage system. The Hi-Track monitoring and reporting
tool detects drive failures and notifies the Hitachi Data Systems Support
Center automatically, and a service representative is sent to replace the drive.