9 Jan
2021
9 Jan
'21
10:10 a.m.
On Jan 8, 2021, at 8:57 PM, Eric Smith via cctalk
<cctalk at classiccmp.org> wrote:
On Fri, Jan 8, 2021 at 6:17 PM Paul Koning <paulkoning at comcast.net> wrote:
Yes. But perhaps I misunderstood; I thought the note to which I was replying described
taking a raw dump of the disk itself, not a logical copy via the MSCP controller.
paul
Yes, but also to hide bad blocks. So the
difference between a raw sector
dump and a SIMH container file is, minimally, the spare sectors. What that
looks like depends on the format; I have no idea what MSCP controllers did.
MSCP controllers do the bad block mapping, so AFAIK the disk _always_ looks
to the host like a linear array 0..n-1 of 512-byte blocks.