On 2017-02-06 00:25, Paul Koning wrote:
On Feb 5, 2017, at 3:31 PM, Mark Pizzolato <[email protected]> wrote:
On Sunday, February 5, 2017 at 11:07 AM, Johnny Billquist wrote:
...
A concept related to this discussion is simh's auto sizing of disks. In the
PDP11 and
VAX simulators the RQ and RP disks use the sim_disk library to perform I/O to
disk
Images and/or physical disk devices.
A relatively new feature that this code performs is that it make an attempt to
peek
into the image file being attached and determine the size of the file system
that
is in the container file. Currently there is support for detecting the size of
ODS2/5
file systems and Ultrix partition tables.
...
So, I'd like to expand the set of file system types that the auto sizing logic
can perform
to include RSTS disks and whatever might be commonly used with RSX and RT11.
Yes, that would be neat. I'm hoping to get to get to that sometime soon. It's
clearly doable for RSTS. Not as simple as for ODS because it has to look up a
file (the free space bitmap).
Well, you do need to do a file lookup in ODS as well.
Maybe the complexity is similar. Although file lookups in ODS in this
case is rather simple. I don't know how that looks under RSTS/E. Maybe
it is more complicated?
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: [email protected] || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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