jnc at mercury.lcs.mit.edu
Wed May 29 16:01:12 CDT 2019
> From: Holm Tiffe
>> The "--list" command to 'dd' gives a whole bunch of stuff:
> $ dd --list
> dd: unknown operand --list
I was talking about the program I had mentioned in the previous email, "dd
for Windows". The "--list" command to it produced that long list of devices
(the list you edited out of the reply), so it definitely works there.
> Nobody in a PDP11 is interested what Windows thinks about partitions.
Understood, but in my previous email I had given an example using a uSloth
>> dd-removable if=UnixRoot of=\\?\Device\Harddisk2\Partition0 count=4872 seek=131072
so when your reply mentioned "partitions" ("You have to have an already
existing parition structure on the disk") it was natural to assume you meant
those - especially since there was a plausible reading of your comment
involving them (i.e. 'does "dd for Windows" only work on a disk with an
existing uSloth partition structure on it').
> Most of the PDP11 SCSI Controllers could build two or more PDP11 disks
> out of one physical device. That is what I meant with partition in this
> case .. There is some logical information on the device, you simply
> don't get the entire raw device on the pdp as you possibly think.
That's a good point, and perhaps there's no existing way to write a SCSI disk
from a Windoze box in a way that the PDP11 SCSI controllers can grok. I don't
know enough about how they work to answer that.
> Tapes have no such restrictions
Right, but one has to have a tape drive; the OP may not.
More information about the cctalk