formatting MFM drives on a IBM PC

Geoffrey Oltmans oltmansg at
Thu Sep 28 09:21:56 CDT 2017

On Wed, Sep 27, 2017 at 11:16 AM, allison via cctalk <cctalk at>

> IDE disks format usually meant high level only.  SCSI could be either
> depnding on the specific controller and media.
Seems like the omission of low level formatting of IDE drives had more to
do with preserving the servo track data, (and maybe aforementioned
firmware/bad sector data) yes? Were any earlier MFM/RLL voice coil/servo
controlled, or were they all stepper drives?

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