. According to a third aspect of the present invention there is provided a method of controlling access to and modification of information stored on a storage medium forming part of a computer system comprising: dividing information stored on the storage medium into a plurality of non-overlapping partitions including a boot partition and at least one general partition, characterised by designating at least one of said partitions a Write Many Recoverable (WMR) partition wherein, in use, if a write command is issued to overwrite any information stored in a/the WMR partition prior to undertaking said write command said information is copied and stored elsewhere on the storage medium to be copied back to said WMR partition when requiredxe0x00x00for example upon a system reset. 