[Info-vax] Valid disk types for SIMH?

[glen herrmannsfeldt]

JF Mezei <jfmezei.spamnot at vaxination.ca> wrote:
> Paul Sture wrote:
 
>> Now you have me wondering if what I am seeing is a feature of the OS X 
>> file system.
 
> ls -l  provides the file size in terms of number of bytes used. Not sure
> which incantation of ls s needed to get allocated blocks.

On systems I know, ls -s give the number of allocated (512 byte)
blocks.  If the file has holes, that number can be much lower
than the value from ls -l divided by 512.
 
> when you INIT, i believe that by default, it places some of the
> structures in the middle of the disk.
 
> So the container file of say 1 gig would have some structure probably
> written at the start and its middle, but nothing after. So the file
> system would think the logical end of file is the highest byte written,
> hence near the middle of the disk.

-- glen