On 07/02/2011, at 6:48 PM, Peter Bull wrote:
> > I have an external hard drive for backups and I think there is a problem with > a backup of a USB drive. I tried to delete so I could do another backup but I > get an error message -50 which the Apple website translates as "-50 paramErr > Error in user parameter list". > > Time Machine also informs me that it can't do its hourly backup. > > Any ideas? Hi Peter, How did you try to delete the backup? You should never delete Time Machine backups by moving them to the Trash with Finder. They should only be deleted by using the Time Machine backup itself (enter Time Machine, select the backup, click the gear button, select "delete backup”. Otherwise our TM backups will corrupted. If they are you would need to reformat your Time Machine disk with Disk Utility and start over. But first: Try to “Repair the Backup Time Machine Drive <http://web.me.com/pondini/Time_Machine/A5.html> Time Machine won’t be able to do it’s hourly backup until you can repair the File System on the drive. Cheers, Ronni 17" MacBook Pro Intel Core i7 2.66GHz / 8GB / 1067 MHz DDR3 / 500GB Serial ATA Drive @ 7200rpm OS X 10.6.6 Snow Leopard Windows 7 Ultimate (under sufferance) -- The WA Macintosh User Group Mailing List -- Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> Unsubscribe - <mailto:[email protected]>
