Western Digital Purple PR1000M, Technical Reference Manual

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S
PECIFICATIONS PR1000M
10 RELEASED 5/8/17 (WD CONFIDENTIAL) 2679-800020-A03
2.6 Reliability Specifications and Characteristics
The average Annualized Failure Rate (AFR) calculations assume operation at nominal
voltages, base casting temperature of 40°C, and the workload usage of a typical
surveillance environment. Workload is defined as the number of bytes transferred by
the user to/from the drive. If the system(s) that the drive is installed in are not
capable of meeting the characteristics listed below, please use a WD drive that
matches your system(s)' capability. Operating drives outside any of the reliability
characteristics listed below will result in a higher AFR.
2.7 Device Plug Connector Pin Definitions
These drives interface with the host I/O bus via the SATA interface connection
illustrated in Standard Factory Connectors below. The drive receives power from the
SATA power connection or legacy ATA 4-pin power connector J3 in Standard Factory
Connectors. Table 2-2 identifies the pin definitions of the SATA connectors and the
corresponding signal names and signal functions.
Figure 2-4. Standard Factory Connectors
Reliability Specification
Average AFR over the LImited Warranty Period
0.88%
Reliability Charateristics
Base Casting Temperature
40°
Annual Power on Hours (POH)
<=8760
Annualized Workload Rate
1
<=180 TB/
YR
Annualized Workload Rate = TB transferred x (8760 / recorded power-on hours)