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The Hard Drive
It is impossible to confuse the Western Digital Raptor X hard drive with any other hard drive because it has a clear window in the top plate, through which you can see the drive mechanism. Also, unlike other hard drives which usually have a label on the top plate, the WD Raptor X's top plate is devoid of any stickers or labels. Instead, Western Digital placed the label on the underside of the drive.
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Due to the limited space, the label only lists some important information, like the drive model, date and place of manufacture, and serial number (in case you need to RMA it).
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Usable Capacity
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The Western Digital Raptor X officially has a formatted capacity of 150,039 MB. We checked that out by formatting it in NTFS using Windows Vista.
The actual formatted capacity was 150,037,590,016 bytes. This is very slightly (1.4 MB) lower than the official formatted capacity.
With about 100 MB allocated to the NTFS file system, the actual usable capacity was only 149,937,451,008 bytes, or just under 150 GB.
Let's take a look at its specifications.
Specifications
Model |
• WD1500AHFD |
Formatted Capacity |
• 150,039 MB |
Guaranteed Sectors |
• 293,046,768 |
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 |
• 84 MB/s (sustained) |
Maximum I/O Transfer Rate |
• 1.5 Gbits/s |
Average Seek |
• 4.6 ms (read) |
Average Latency |
• 2.99 ms (nominal) |
Drive Ready Time |
• 7.0 seconds (average) |
Interface |
• Serial ATA 1.5Gb/s |
Supported SATA Data Transfer Mode |
• 1.5 Gbits/s |
SATA Hotplug Capability |
• Yes |
Maximum Height |
• 26.1 mm |
Maximum Width |
• 101.6 mm |
Maximum Length |
• 147.0 mm |
Maximum Weight |
• 822 g |
Power Requirements |
• +12V DC ± 10 % |
Power Consumption |
• 8.4 W (Read / Write) |
Ambient Temperature |
• 5 °C to 55 °C
(Operating) |
Maximum Shock |
• 65 G @ 2 ms (Read) |
Drive Acoustics |
• 29 dBA average (Idle Mode) |
Maximum Operating Vibration |
• Random : 10-300 Hz, (0.008 g2/Hz) |
Maximum Non-Operating Vibration |
• Low Frequency : 10-300 Hz, 0.195 inches (double amplitude) |
Non-Recoverable Read Errors |
• 1 error per 1015 bits read |
Load/Unload Cycles |
• 20,000 (minimum) |
MTBF |
• 1,200,000 hours |
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