Originally posted by davey23uk
Kinda gets tricky with only having a maximum 2Gb size for an export file so will have to go round exporting on a partition by partition basis
No need for that. You can make exp to write the export to multiple smaller dmp files. For example if your export will result in the file of 7GB, you can instruct it to write into 4 smaller files, for example 2000 MB each (the last one will be smaller, of course). The command will be something like:

exp un/pwd file=(expdat1.dmp, expdat2.dmp, expdat3.dmp, expdat4.dmp) filesize=200MB .....