Specifications; Performance Specifications - Western Digital Scorpio ML320S-AF2 Technical Reference Manual

WD Scorpio ML320S-AF2
2.0 S
PECIFICATIONS
2.1

Performance Specifications

Average Seek
- Read
- Write
Track-to-Track Seek
Full Stroke Seek
Index Pulse Period
Average Latency
Rotational Speed
Data Transfer Rate (maximum)
- Buffer to Host
- Max buffer to disk
Buffer Size
Error Rate - Unrecoverable
Spindle Start Time
- From Power-on to Drive Ready
- From Power-on to Rotational Speed
Spindle Stop Time
Load/Unload Cycles
1
During continuous Seek, Read, or Write commands, an algorithm in the code will add latency as required to keep
the VCM motor from overheating;s seek performance will be impacted under this condition.
2
As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and
one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As
used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte
per second (MB/s) = one million bytes per second, and gigabit per second (Gb/s) = one billion bits per second.
Effective maximum SATA 3 Gb/s transfer rate calculated according to the Serial ATA specification published by
the SATA-IO organization as of the date of this specification sheet. Visit www.sata-io.org for details.
3
Defined as the time from power-on to the setting of Drive Ready and Seek Complete including calibration.
4
Defined as the time from power-on to when the full spindle rotational speed is reached.
5
Controlled unload at ambient condition.
2679-771320-A00
1
1
2
3
4
5
RELEASED 4/7/11 (WD CONFIDENTIAL)
12.0 ms average
15.0 ms average
1.5 ms average
24 ms average
11.1 ms (nominal)
5.5 ms
5400 RPM
3.0 Gb/s maximum
116 MB/s maximum
8 MB
14
<1 in 10 bits read
4.0s average
2.0s average
8s average
600,000

Specifications

3