I felt the tone was set by you, and responded as civilly as I could manage. It seems I'm alone in thinking that you're making this up as you go, so I'll apologize for suggesting that you lacked credibility with a posting history of zero.
I'm glad you appreciate my assistance with your arithmetic. Let's just recap, shall we?
I have built PC's for a living for a decade now (6000+ complete PC's ...
The scale of my business allowed me to average 7.25 computers a day for 5 years running.
If we give you 4 weeks off each year, that's 8,700 computers in 5 years, and I assume -2.25 a day for the other 5 years.
A 15K serial ATA drive may appear in the near future, at which point the (few remaining) SCSI benefits may cease to exist.
Personally I would love a UDMA133 ATA 10 OR 15k drive to show how effective such a device could be, and how realistic it might indeed be to do without SCSI.
Serial ATA is virtually cut down SCSI rather than just a revision of ATA. You'd expect a drive so equipped to perform comparably to SCSI. It proves nothing.
My point about intended use would be well known to people on this site who have followed the evolution of SR's benchmarks. As I said, expensive server drives are optimized for operation in servers. The fact that they may also perform slightly better in a desktop is incidental. It's not a design consideration, and replacing the interface with ATA133 is nothing but a hypothetical exercise. Similarly, it's hard to see why Seagate would produce a SATA version of the X15. Even most of the enthusiasts here choke at the cost, and that's not going to change by changing the interface.
Wrong, Wrong, Wrong. I bought a 40GB 60GXP from the same distributor a year ago for my personal use, and it had a 3 year warranty. I RMA'd the device due to an increase in spin noise at one juncture, so I am sure of its warranty status. My distributor is indeed an authorized IBM drive reseller. I don't know what you find on the shelf in your neck of the woods, but I have never seen a "retail" IBM disk drive.
An IBM OEM drive is sold direct to OEMS (eg Dell). Everything else is a "retail" drive, including most of what's in the channel. In theory, you should see nothing but "retail" drives, but the large OEMs dump excess inventories into the channel, so it's possible to end up with OEM drives.
The reason they're differentiated is because IBM offers a three year warranty on retail drives, but one year or zip on OEMs (the OEM provides the warranty).
AFAIK, this doesn't happen if you buy direct from an authorized IBM distributor, or a wholesaler that buys solely from an authorized IBM distributor.
With regard to the magic $20, here's how a business looks at it:
If I buy 100 drives at $60, and 10 fail in the second and third year, it will cost me $600 to replace them, or $6 amortized over each drive used. That's less than what the drive manufacturer wants to rob me for, so why would I bother? The AARR would have to be a whopping 17% just to break even, and that's ignoring the fact that I get to keep the extra $2000 for an average of two years.