From Newsgroup: comp.sys.acorn.misc

Hi,

I'm trying to remember if there is a limit to the number of files a
directory can hold in R Adjust 4.39. Don't think I've got a guide here
in the Antipodes.
--
Chris Newman
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From Newsgroup: comp.sys.acorn.misc

In article <5c9a0b988cmec@npost.uk>,
Chris Newman <mec@npost.uk> wrote:

I'm trying to remember if there is a limit to the number of files a
directory can hold in R Adjust 4.39. Don't think I've got a guide
here in the Antipodes.

Is that on VRPC?
If so, which filing system are you using?
--
Martin Avison
Note that unfortunately this email address will become invalid
without notice if (when) any spam is received.
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From Newsgroup: comp.sys.acorn.misc

In article <5c9a1bc141News04@avisoft.f9.co.uk>,
Martin <News04@avisoft.f9.co.uk> wrote:

In article <5c9a0b988cmec@npost.uk>,
Chris Newman <mec@npost.uk> wrote:

I'm trying to remember if there is a limit to the number of files a directory can hold in R Adjust 4.39. Don't think I've got a guide
here in the Antipodes.

Is that on VRPC?

Yes.

If so, which filing system are you using?

Eh? I didn't know there was a choice. Aeeons ago I just got my shiny CD
from Aaron and set it up as per instructions.

Ah! I think I see what you mean. It's RPC-StrongArm Adjust. Long
filenames are OK.
--
Chris Newman
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From Newsgroup: comp.sys.acorn.misc

On 12/01/2026 13:27, Chris Newman wrote:

I'm trying to remember if there is a limit to the number of files a
directory can hold in R Adjust 4.39. Don't think I've got a guide here
in the Antipodes.

On Filecore formatted storage directories can grow to accommodate more
files until they reach 4MB. The number of files will depend on the
length of the filenames, the 28 bytes of meta for each file, and another
~36 bytes overhead.

---druck
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From Newsgroup: comp.sys.acorn.misc

druck <news@druck.org.uk> wrote:

On 12/01/2026 13:27, Chris Newman wrote:

I'm trying to remember if there is a limit to the number of files a directory can hold in R Adjust 4.39. Don't think I've got a guide here
in the Antipodes.

On Filecore formatted storage directories can grow to accommodate more
files until they reach 4MB. The number of files will depend on the
length of the filenames, the 28 bytes of meta for each file, and another
~36 bytes overhead.

I believe the 'old' formats were:
S/M/L: 47 files per directory (BBC Master)
D/E/F: 77 files (D = Arthur, E = RISC OS 2, F = RISC OS 3)

and it's the 'F+' format that allows 'unlimited' files (and >10 char filenames), up to the limits you cite.

Everything recently formatted will be F+, but some old discs (old
floppies?) may be E or F with the old limits. IIRC there is no difference between E or F when formatting hard drives, F was just introduced for 1.6MB
HD floppies as against 800KB E-formatted floppies.

Theo
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From Newsgroup: comp.sys.acorn.misc

In article <NMv*n7zwA@news.chiark.greenend.org.uk>, Theo <theom+news@chiark.greenend.org.uk> wrote:

druck <news@druck.org.uk> wrote:

On 12/01/2026 13:27, Chris Newman wrote:

I'm trying to remember if there is a limit to the number of files a directory can hold in R Adjust 4.39. Don't think I've got a guide
here in the Antipodes.

On Filecore formatted storage directories can grow to accommodate
more files until they reach 4MB. The number of files will depend on
the length of the filenames, the 28 bytes of meta for each file, and another ~36 bytes overhead.

I believe the 'old' formats were: S/M/L: 47 files per directory (BBC
Master) D/E/F: 77 files (D = Arthur, E = RISC OS 2, F = RISC OS 3)

and it's the 'F+' format that allows 'unlimited' files (and >10 char filenames), up to the limits you cite.

Thanks to all who replied. I'm tackling this bit by bit as we're supposed
to be having a holiday & the Mem Sahib gets a bit miffed if we're not
doing enough sight-seeing, visiting friends & relations a generally
enjoying ourselves.

The story so far. I've got inveigled into doing a presentation here each
year on aspects of early jazz. I should have finished it all before
leaving UK but you know how time escapes.

I use OHP. I was adding a jpeg to the folder holding the material and got
an abort on data transfer message. I had a good look at that file and it
seemed OK so I wondered if it was a directory limitation. That's why I
asked the question

I've since discovered Recyclone gave that error as well and so did other directories. I had to go into the VA on the Windows side to find the
Recyclone bin which was very full as I'd been deleting the unwanted saved presentations often. Now all seems well.

The presentation has at present 254 files and 101 553 531 bytes which (if
I've done the maths correctly) is 97 Mb, obviously much more than 4Mb.
So it seems Virtual Acorn running R Adjust 4.39 is quite happy.

Is there a RISC OS app that does a less arcane calculation of a
directory's size? I seem to remember !RealCount but can't find a link.

I'll again try adding more files to the presentation and see what
happens. Fingers crossed.
--
Chris Newman
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From Newsgroup: comp.sys.acorn.misc

In article <5c9b5ed496mec@npost.uk>,

<enormous snip)

I'll again try adding more files to the presentation and see what
happens. Fingers crossed.

I tried adding more files and the fault seems to have gone away. No more
abort on data transfer messages. I have no idea what cured it which is a
bit annoying as I like to know what causes these things. Hey, ho.
Pressing on regardless.

Ruddy cold and wet back here in UK. We hadn't seen rain for 8 weeks in
Aus.
--
Chris
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