I'm not sure where you got this idea, it's not remotely accurate. I've never seen WD put an ad for Raptor drives in any IT publication, yet they advertise all over PC hardware enthusiast sites like this one.
The product page claims "This is the ultimate hard drive for PC performance enthusiasts everywhere.", and last but not least THEY PUT A FREAKING WINDOW ON THE DRIVE! This is not a feature enterprise users are clamouring for. You can't buy a Raptor in a Dell, IBM or HP server. Sorry if it seems like I'm picking on you, but you are way off man.
No, I'm not way off.
Go to Western Digital's home page.
http://www.westerndigital.com
On the left side, click on Enterprise Drives. The Raptor is the first hard drive listed.
Underneath it, it says:
Built for speed! WD Raptor is a unique class of hard drives that matches SCSI reliability and performance while providing simplified connectivity – all at less cost than Parallel SCSI drives.
Key Features:
World's only 10,000 RPM SATA drive
1.2 million hrs. MTBF at 100% duty cycle
Ideal for:
High-speed servers, network attached storage and workstations.
Click on the Raptor drive itself to go to the product page. There, it says:
Some hard drive companies design desktop-class drives with the SATA interface. To meet the demands of enterprise storage, WD is going one better. WD is the only company combining a 10,000 RPM enterprise-class mechanical platform with the SATA interface to meet all the demands of the enterprise environment—reliability, performance, and reduced cost.
Under the overview, it says:
WD produces the world’s most reliable SATA drives. With 1.2 million hours MTBF, enterprise duty cycle, 5-year limited warranty, next-generation SATA technology, and state-of-the-art vibration tolerance, WD Raptor drives offer the best combination of reliability, high capacity, and performance for enterprise applications.
Under the "Applications", it says:
Servers, network attached storage, scientific computing, video surveillance, enterprise backup, document and image management, digital video.
In those short paragraphs, the words "server", "workstation", or "enterprise" are mentioned NINE times.
Kronos is correct, the Raptor never made really big inroads into the Enterprise market because higher end server companies like HP, Dell, and IBM continued to produce servers that use SCSI drives, and WD doesn't have a SCSI division.
Once WD saw that enthusiasts were flocking to the Raptor because of the speed and SATA interface, they hopped on the bandwagon with the Raptor X (which includes the window). The Raptor X is marketed as a desktop/enthusiast drive on WD's website, but the specs on the Raptor X (WD1500AHFD) are exactly the same as the specs on the regular Raptor (WD1500ADFD), including the 1.2M hours MTBF.
But even after the Raptor became an enthusiasts' choice, WD has not diminished marketing of the Raptor as an enterprise drive. That is still the purpose it was built for. The enterprise features of the drive that you won't find in many desktop drives are:
- 10K RPM (still the only 10K SATA drive there is)
- NCQ (Many SATA drives have this now, but the Raptors had it way before anything else. It was meant to compete with SCSI's command queueing, which is necessary for good file server performance. It does little for desktop systems).
- TLER/Time-Limited Error Recovery (Meant exclusively for RAID systems)
- RAFF/Rotary Acceleration Feed Forward (Additional motor servo control to combat vibration when the drive is in a RAID enclosure and subjected to the vibration of adjacent drives).
- 1.2M hours MTBF (Considered very high reliability, not present in desktop drives).
- 5 Year warranty (some desktop drives have this, but most are 3 year).
The Raptor is an Enterprise drive, from the ground up. No question about it.
Edit: Corrected information regarding Raptor X MTBF.