Thanks Ronni and Neil, I shut down the Mac and after it restarted Disk Utility was able to repair the disk. So it is now backing up quite happily!!
On 09/02/2011, at 2:51 PM, Neil Houghton wrote: > > Hi Peter, > > In the past, I have had drives get "hung-up" and refuse to unmount > (generally, I think, when OSX thought the drive was "in use" - but I > couldn't find out what was supposed to be "using" it). > > In this case, I have found that shutting down the computer seems to "put > everything to bed" and the disk is OK when the computer reboots. > > I realise that your situation is different and I don't know if it will help > in your situation - but it might be worth a try (if you haven't already > tried this). > > Of course, this would not solve your original problem - but, if the disk > could now be mounted/unmounted, you could then proceed with Ronni's > suggestions to sort out your TM problems. > > > HTH > > > > Cheers > > > > Neil > -- > Neil R. Houghton > Albany, Western Australia > Tel: +61 8 9841 6063 > Email: [email protected] > > > > > on 9/2/11 2:06 PM, Peter Bull at [email protected] wrote: > >> >> Hi Ronni, >> I tried a couple of the things you suggested but kept getting a message that >> the disk could not be unmounted and so the Repair Disk could not be done. >> >> So I decided that erasing and reformatting the disk was the only option, but >> again it was not possible as it could not unmount the disk. >> >> Following a previous post of yours about deleting, I have not tried to delete >> by dragging the backups to the Trash. >> >> What's next?? >> >> Regards, >> >> Peter Bull >> iMac 10.6.6 >> >> Windows 7 (also under sufferance!) >> >> >> On 07/02/2011, at 7:36 PM, Ronda Brown wrote: >> >>> >>> >>> 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]> > Regards, Peter Bull [email protected] -- 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]>
