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- Path: sparky!uunet!mcsun!uknet!bradford.ac.uk!D.S.Walker
- From: D.S.Walker@bradford.ac.uk (Simeon Walker)
- Newsgroups: comp.sys.acorn.tech
- Subject: Re: MFM Harddisc size
- Message-ID: <1992Nov21.123509.12505@bradford.ac.uk>
- Date: 21 Nov 92 12:35:09 GMT
- References: <1992Nov17.180524.42564@urz.unibas.ch> <1992Nov19.090920.8363@csd.uwe.ac.uk> <1992Nov20.173551.42574@urz.unibas.ch>
- Organization: University of Bradford, UK
- Lines: 51
- Originator: 91909178@muser
- Nntp-Posting-Host: muser
-
- In article <1992Nov20.173551.42574@urz.unibas.ch> gaspar@urz.unibas.ch writes:
- >In article <1992Nov19.090920.8363@csd.uwe.ac.uk>, r_voisey@garlic.uwe.ac.uk (R Voisey) writes:
- >> In article <1992Nov17.180524.42564@urz.unibas.ch>, gaspar@urz.unibas.ch writes:
- >>
- >> |> > bigger than 50Megs you have to swap a link (to change sector size I think).
- >> |> / ^^^^^^^^^^^
- >> |> Could someone tell me what this means?
- >>
- >> |> 9 heads and when I enter that parameter I get a message that I might!
- >> |> swap link 3 or something like that.
- >>
- >[ text deleted]
- > So, if you want to swap link 3 you have to take the lid off your
- >> machine, and find J3.
- >[text deleted
- >
- >>
- >> Hope that helps
- >
- >Yes it helped! Thanks. The jumper wasn't called J3 though. There are two
- >jumpers next to the cables that go to the drive and they are calld PL8 and PL9.
- >I tried out every combination of setting and it worked with BOTH jumpers
- >changed. Does someone (maybe from Acorn?) know if that's ok?
- >
- >The problem wasn't solved completely because the drive should have 88 Meg
- >capacity. After formatting with 17 Sect/Track, 9 Heads and 1024 Cylinders
- >(The controller cannot cope with more that 1024, I think. The drive has 1073
- >cylinders), I had about 40 Meg free on the drive. Where is the rest???
- >
- >I tried to format the drive with 32 Sect/Track and it worked. But this is
- >probably not advisable to do.
- >Any ideas?
- >
- >> Bob
- >laci
-
- Most specs for hard drives intended for PC's seem to specify 17 sectors.
- While trying to get an old Seagate drive to format under RO2 giving 17
- sectors I got only half the capacity. Later with the formatter that comes
- with RO3.1 I formatted it to 32 sectors (all other params the same) and
- got the full capacity and it works fine.
-
- As far as the hardware of the drive is concerned I don't think it matters
- how many sectors there are per track. I *think* it's dependant on what
- the software expects.
-
- --
- Sim. ----------------------------------------------------------- Simeon Walker,
- ----------------------------------------- Department of Electrical Engineering,
- D.S.Walker@bradford.ac.uk -------------------- University of Bradford, England.
-