Do you have a hard disc which is suffering problems? Press F12 and type:

*checkmap <drive no>

for each of your drives. If you don't get "Map good", or you have experienced errors such as "Broken Directory" or the dreaded "Disc not understood", then the disc has a problem.

If your disc does have one of these problems then DiscKnight may be the answer you've been looking for.

DiscKnight is a disc checker and fixer for FileCore E and E+ format hard discs which incorporates fixes for a large number of problems.

DiscKnight is the first tool to include support for the new E+ format introduced with RISC OS 4 to provide support for long filenames and large directories.

Want to know what DiscKnight can do for you?

Want to know if your disc has any problems? Then download the DiscKnight disc checker and run it to check the health of your hard discs.

The DiscKnight disc checker available here has now been updated to version 1.51 so if you have previously downloaded it you may like to obtain a new copy of the latest version.

32-Bit Compatability

As of version 1.39 DiscKnight is fully 26/32 bit neutral and runs equally well on 32-bit Iyonix PCs as well as older RISC OS computers.

ARMv7 Compatability

As of version 1.49 DiscKnight has been compiled for ARMv7 compatibility so will run on systems such as Beagleboard with alignment exceptions turned on.

Raspberry Pi and RISC OS 5.20 onwards

As of version 1.50 DiscKnight has been updated to handle the format of the SD card used in the Raspberry PI which has both a FileCore partition and a bootable DOS partition. It has also been updated to handle the modified Filecore format in RISC OS 5.20 onwards, which allows for file sizes of up to 4GB, and maps spanning more than disc zone.

Ordering DiscKnight

A single user licence forDiscKnight costs only £10 fully inclusive.

A site licence for multiple machines at a single site costs £25 and a licence for a dealer or repair centre who use DiscKnight to repair customer machines is available for £100.

DiscKnight can be purchased online using your credit card on the SWREG web site web site - please use one of the following links to place your order:

Any questions relating to the purchase of discknight should be sent to discknight[at]armclub[dot]org[dot]uk.


When you buy DiscKnight online then you will be registered with the support service automatically when the product is sent out. Registered are added to a mailing list which is used to announce any updated versions of DiscKnight which are made available.

Registered users can obtain an update to the latest version here. If you change your email address after you have registered then you can register your change of address here.

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Last modified 25th November 2008 · Comments to webmaster@armclub.org.uk