I've got a Late-2009 Aluminum iMac (27"). It crashed last night, so I restarted and it booted into the restore disk. I tried to verify/repair the disk and got: I thought I had a recent time machine ...

With over a decade of experience at Which?, Tom covers everything from tech advice to money-saving tips, highlighting the best deals during big sales events. Windows has a handy feature called CHKDSK ...

There are a variety of maintenance routines that people can run in OS X, including the disk verification and permissions repair that come with the system, along with scripts such as cache cleaners ...

The problem: As frequently as every 5-10 minutes (but not always), the hard disk will grind away for a good 5 seconds and slow down the rest of the computer. I haven't found a pattern in the frequency ...