James Bucanek wrote: > Select all, and duplicate again. I'd hit upon the idea of duplicating a file, but not doing select all and duplicating the lot. Kicking myself now :) > Now use the 'cmp' tool to compare the first file you made with the > last one that was duplicated. That was really helpful. Everything seems to be fine, which suggests my G4 can both read and write to the full 160Gb of this disk. Thanks for your help James, mind if I mention your name if I submit a report to www.xlr8yourmac.com? -- adrinux (aka Adrian Simmons) e-mail <mailto:adrinux at ntlworld.com> AOL or Yahoo Messenger ID: perlucida Microsoft Messenger ID: adrian at perlucida.com blog <http://adrinux.perlucida.com>