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- Path: sparky!uunet!destroyer!gumby!wupost!waikato.ac.nz!mcg
- From: mcg@waikato.ac.nz
- Newsgroups: comp.sys.acorn.tech
- Subject: Re: ADFS maps
- Message-ID: <1992Nov11.151606.12096@waikato.ac.nz>
- Date: 11 Nov 92 15:16:06 +1300
- References: <ARM200-921109172536-1C45F389*@MHS>
- Organization: University of Waikato, Hamilton, New Zealand
- Lines: 37
-
- In article <ARM200-921109172536-1C45F389*@MHS>, /G=Rhodri/S=James/O=SJ-Research/ADMD=INTERSPAN/C=GB/@mhs-relay.ac.uk writes:
- > ijp@doc.ic.ac.uk (Ian Palmer) writes:
- >
- >>Over the weekend I suddenly (well over the period of a few mins) lost
- >>3.5Meg of my hard disc free space. I was archiving some files and what
- >>appeared to happen is that every time a new file was placed in the
- >>archive (producing a copy of the archive temporarily) the old one at
- >>the end was NOT being added to the free space map (or is it taken
- >>away?) on my IDE (A5000) hard disc.
- >
- > I suspect that you are the victim of map rot. It can happen that when doing
- > lots of writing/deleting, RiscOS fails to link now unused areas of disc onto
- > the free list, resulting in a number of phantom objects in the map, rotting
- > away the free space. Owen tells me that RO 3.1 is the least prone to map
- > rot, by the way. It's also the only version on which I've actually observed
- > the problem, but never mind.
- >
-
- How does compacting the drive affect this "rotting" of the free map.
-
- Also, could you post the alternative methods for recovering the free space map;
- this will be interesting to know for future reference.
-
- From Martin Glanvill (mcg@waikato.ac.nz)
-
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