I'm experiencing some mac related worry - HD began to make whirring noise this morning (stopped after ten minutes) but when I ran Disk Utility the following message appeared: 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 What's your advice?