OS's don't support foreign file systems. What they do is provide the ability to access a drive that does not have what they believe to be a valid file system. You need a utility to do this. One of the problems is that some systems do not have either the concept of a mountable pack, or the ability to access a drive at the lowest level. To them if they see a drive they will make it part of the existing filesystem. I'm thinking of the B5500 under MCP, Tops10, Scope 3.0-2, Ibm 70xx. Tape drives also come in many formats, generally they look like a linear stream of characters (6 or 8 bits), broken up into chunks. Most machines that deal with tapes can talk deal with raw tapes.
------- Original Message -------
On 4/20/2016 2:48 PM Ken Cornetet wrote:
Again, you don't need OS support for foreign file systems, you just need to be able to read the disk blocks in a raw mode.
-----Original Message-----
From: S imh [mailto:[email protected]] On Behalf Of Rich Alderson
Sent: Wednesday, April 20, 2016 2:31 PM
To: [email protected]
Subject: Re: [Simh] Way out idea for simh
> Date: Wed, 20 Apr 2016 17:04:18 +0000
> From: [email protected]
> For example the B5500 does not have the concept of a mountable pack.
> Drives could be attached, but they were a permanent attachment. For
> the Ibm 7000 line, most did not support disk. The disk drive that was
> supported by many of the machines was a large box that you could not
> put drives into (IBM 1301/2301). Also these machines all worked in BCD
> (6 bit), not Ascii.
> I am also not sure when TOPS10 got support for mounting foreign file
> systems. I don't believe that 6.03 or 5.03 support this idea.
As of 7.05 (the very last maintenance release, from 1990) it still hadn't.
I work with it daily.
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