Western Digital Purple Pro PR22 handleiding
Handleiding
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Product Features
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3.17 Fluid Dynamic Bearings (FDB)
Bearing design that incorporates a layer of high-viscosity lubricant instead of ball
bearings in the hard drive spindle motor. As an alternative to conventional ball
bearing technology, FDB designs provide increased non-operational shock resistance,
speed control, and improved acoustics.
3.18 Staggered Spinup and Activity Indication (SATA Power Pin 11)
Note: This feature is available for specific OEM configurations.
SATA device power connector pin 11 (see Section 2.7.2 Cabling Requirements for
Serial ATA on page 18) is defined as a means by the host to DISABLE staggered
spinup and it may also be used by the device to provide the host with an activity
indication. According to the SATA spec, “Staggered Spin-up Disable and Activity
Signal shall not be enabled at the same time.”
3.19 48-bit Logical Block Addressing (LBA)
The 48-bit Address feature set allows devices with capacities up to approximately 281
tera sectors or approximately 144 peta bytes. In addition, the number of sectors that
may be transferred by a single command are increased by increasing the allowable
sector count to 16-bits.
3.20 Power Management
This drive supports the ATA power management commands that lower the average
power consumption of the hard drives. For example, to take advantage of the lower
power consumption modes of the drive, an energy efficient host system could
implement a power management scheme that issues a Standby Immediate command
when a host resident disk inactivity timer expires. The Standby Immediate command
causes the drive to spin down and enter a low-power mode. Subsequent disk access
commands would cause the drive to spin up and execute the new command. To
avoid excessive wear on the drive due to the starting and stopping of the HDA, set
the host’s disk inactivity timer to no shorter than ten minutes.
The drive also supports the SATA power management feature that lowers the average
power consumption of the SATA interface.
Table 3-1. 48-bit Logical Block Addressing (LBA)
48-bit Address
Bits (47:40) Bits (39:32) Bits (31:24) Bits (23:16) Bits (15:8) Bits (7:0)
LBA High
(exp)
LBA Mid (exp) LBA Low (exp) LBA High LBA Mid LBA Low
16-bit Sector Count
Bits (15:8) Bits (7:0)
Sector Count
(exp)
Sector Count
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Productinformatie
| Merk | Western Digital |
| Model | Purple Pro PR22 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 4319 MB |