Tech ARP - Western Digital 300 GB VelociRaptor Serial ATA Hard Drive Review Rev. 3.0

	Date :	27 November 2008
	Manufacturer :	N/A
	Source :	N/A
	Category :	Storage
	Author :	Dr. Adrian Wong
	Revision :	3.0
	Forum Link :	Discuss here !
	Views :	134371

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Western Digital 300 GB VelociRaptor Serial ATA Hard Drive Review Rev. 3.0

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Usable Capacity

The Western Digital VelociRaptor officially has a formatted capacity of 300,069 MB. We checked that out by formatting both in NTFS using Windows Vista.

The actual formatted capacity for both BLFS and HFLS was 300,066,795,520 bytes. This is slightly (2.2 MB) lower than the official formatted capacity.

With about 103 MB allocated to the NTFS file system, the actual usable capacity was just under 300 GB.

Let's take a look at its specifications.

Specifications

Model	• WD3000BLFS (2.5") • WD3000HLFS (3.5" Backplane-ready) • WD3000GLFS (3.5" Not backplane-ready)
Formatted Capacity	• 300,069 MB
Guaranteed Sectors	• 586,072,368
Bytes Per Sector	• 512 bytes
Sectors Per Track	• NA
Cylinders	• NA
Platters	• 2 Platters
Read/Write Heads	• 4 Read/Write Heads
Recording Method	• NA
Interleave	• 1 : 1
Spindle Speed	• 10,000 RPM
Cache Buffer	• 16 MB SDRAM
Internal Data Transfer Rate	• 126 MB/s (sustained)
Maximum I/O Transfer Rate	• 3.0 Gbits/s
Average Seek	• 4.2 ms (read, average) • 4.7 ms (write, average) • 0.7 ms (track to track, maximum) • 8.5 ms (full stroke, average)
Average Latency	• 3.00 ms (nominal)
Drive Ready Time	• 7.0 seconds (average) • 10.0 seconds (maximum)
Interface	• Serial ATA 3.0Gb/s
Supported SATA Data Transfer Mode	• 3.0 Gbits/s
SATA Hotplug Capability	• Yes
Maximum Height	• BLFS : 15.0 mm (0.590 inches) • HFLS / GLFS : 26.1 mm (1.028 inches)
Maximum Width	• BLFS : 69.85 mm (2.750 inches) • HLFS / GLFS : 101.6 mm (4.00 inches)
Maximum Length	• BLFS : 100.0 mm (3.940 inches) • HLFS / GLFS : 147.0 mm (5.787 inches)
Maximum Weight	• BLFS : 219 g (0.48 lb) • HLFS / GLFS : 489 g (1.08 lbs)
Power Requirements	• +12V DC ± 10 % • +5V DC ± 5 %
Power Consumption	• 6.08 W (Read / Write) • 4.53 W (Idle) • 0.42 W (Standby) • 0.42 W (Sleep)
Ambient Temperature	• 5 °C to 55 °C (Operating) • -40 °C to 70 °C (Non-Operating)
Maximum Shock	• 65 G @ 2 ms (Read) • 300 G @ 2 ms (Non-Operating)
Drive Acoustics	• All : 29 dBA average (Idle Mode) • BLFS : 34 dBA average (Seek Mode) • HLFS / GLFS : 36 dBA average (Seek Mode)
Maximum Operating Vibration	• Random : 10-300 Hz, (0.008 g²/Hz) • Linear : 20-300 Hz, 0.75 G (0 to peak)
Maximum Non-Operating Vibration	• Low Frequency : 0.05 g²/Hz (10-300 Hz) • High Frequency : 20-500 Hz, 4.0 G (0 to peak)
Non-Recoverable Read Errors	• 1 error per 10¹⁵ bits read
Load/Unload Cycles	• 50,000 (minimum)
MTBF	• 1,400,000 hours

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