formatting MFM drives on a IBM PC
cc at informatik.uni-stuttgart.de
Fri Sep 29 03:11:39 CDT 2017
On Thu, 28 Sep 2017, Chuck Guzis wrote:
> "Low level format" is pretty much a relic of the old non-servo MFM
> drives. I recall that early Maxtor IDE drives implemented a LLF
Lowlevel formatting has to be done for *all* ST-506 interface drives (e.g.
"MFM" and "RLL" drives). It is the disk controller that needs to write its
sector and track layout to the drive (ID marks, data marks, GAPs, CRC, ECC
and so on). This is also true for SMD drives, for example. So it didn't
make much sense in selling preformatted drives until when disk drives
exposed only the disk blocks to the host. Whether a drives uses servo
information or not is irrelevant. I don't consider writing servo
information as lowlevel formatting.
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