[babygene]

More credit goes to the drive manufacturer in my opinion than to DOS. On this generation of disk drive, the servo code is embedded in the data allowing the heads to properly track the center of the data track and also identify the beginning and end of the error correction code for each sector. Older drives used a servo surface on one plater which was used as a reference for all the other platters. That would gave been tougher.

[VOA]

More credit goes to the drive manufacturer in my opinion than to DOS.

That's my view.
And I'd like to know who made them!!!
As I'm planning to buy some back-up drives and all I get is double-talk
on which are the best/most-durable.