What the boat that means is this:
XP, as an OS, natively does not know how to write properly to an AF drive , but when set with the right drivers (those pesky Intel RST drivers for machines using the Intel controller for HDDs) and then aligned, will work as normal on said machines.
It's always my job to field technical queries from customers as a phone support agent, no matter how obtuse the question may seem. Otherwise, I wouldn't, well... have a job.
The OEM I work for, incidentally, includes a sheet of paper with information about the drives, which if I remember right, is white and orange to get the recipient's attention.
The paper even includes a rather helpful, rather descriptive link to the online support documentation that covers the whole procedure in detail.
The problem, as has been demonstrated time and again across the internet, is that people don't read instructions before they go hammering away at something.
Therefore, I'll get a call or two per week from someone who just shoved XP onto an AF drive, and has run into either stop errors (0x7B = Make the damn RST driver available to XP's installer. Known issue for four years now!) or very sluggish performance (XP's issue stems from it treating 4k blocks as 512b blocks, and pooching the alignment without its medicatio^Wdrivers).