Disks.tst: Only check read-write volumes
Disks.tst: don't gather information for unused variables
Disk Usage: check for percentage and value; better output
New "Disks" test that checks the free space of filesystems
Migrated Disks.tst (I/O errors) to Darwin/Disks.tst
More specific test for I/O errors on Mac OS X
Only test for I/O errors since last system boot
Don't get irritated by our own log messages
New "Disks" test to check for I/O errors on for Mac OS X