----- Original Message ----- From: "Al Kossow via cctalk" <cctalk@classiccmp.org> To: <cctalk@classiccmp.org> Sent: Thursday, September 28, 2017 10:34 AM Subject: Re: formatting MFM drives on a IBM PC
> > > On 9/28/17 7:21 AM, Geoffrey Oltmans via cctalk wrote: >> Were any earlier MFM/RLL voice coil/servo >> controlled, or were they all stepper drives? >> > > Most drives 40mb and up are closed-loop with dedicated > servo surfaces and many have servos that don't work any more. > > Maxtor and Atasi are early examples of embedded servo drives. > You can tell if a drive is embedded or dedicated by the number > of heads, odd if dedicated, even if embedded. > -------------------- What is it that usually fails when the drive can't read the servo info? The data on the platter, or? m
