I verified my hard disk in Disk Utility today. It seems I need to make some repairs. Verifying volume Macintosh HD Checking HFS Plus volume. Checking Extents Overflow file. Checking Catalog file. Checking multi-linked files. Checking Catalog hierarchy. %) Checking Extended Attributes file. Checking volume bitmap. Checking volume information. Volume Header needs minor repair d.",1) Macintosh HD Error: The underlying task reported failure on exit 1 HFS volume checked Volume needs repair I have an eMac 1.42Ghz PowerPC G4 running OS X 10.4.11. I lost my installation disc many years ago during a move. Trying to find out if I can successfully repair my disk without the installation disc. I've read these in my search for a solution. https://support.apple.com/kb/HT1782 https://support.apple.com/kb/TS1417 As well as this thread. http://www.ehmac.ca/mac-ipod-help-t...artup-disc-without-mac-os-x-install-disk.html So, I should start up in single user mode and use fsck? Is this very reliable? Are there any significant risks that I should be aware of? Will I lose any files? I don't really have anything to back up my stuff right now. How about AppleJack? Thanks in advance.