[Info-vax] Search for folders

[Fred. Zwarts]

Op 27.jan.2024 om 20:55 schreef Arne Vajhøj:
> On 1/27/2024 1:48 PM, Single Stage to Orbit wrote:
>> On Sat, 2024-01-27 at 00:32 -0500, Dave Froble wrote:
>>> Each disk has what you are calling a root directory.  Within it are
>>> top level  directorys.  The "ROOT" can be addressed as [0,0],
>>> [000000], or [000,000].  Don't ask me why more than one method.  I
>>> don't know.
>>
>> Looks like some form of octal?
> 
> [0,0] is a synonym for [000000].
> 
> I believe it is for backwards compatibility with some PDP-11 OS,
> but that is before my time - maybe some of the PDP-11 knowledgable
> can either confirm and explain or discard the hypothesis.

Yes, PDP-11 running RSX. Each user had a user id and group id and one 
(non-hierarchical) directory of the form [GID, UID].
VMS version 1 was still using a lot of RSX programs, so it used this 
form for compatibility.