Updating boot caches os x 08 chat lines
These can be used either if you are logged in in Single User mode (after holding Command-S at startup to drop you to a root terminal prompt instead of loading the OS X interface), or if you are logged in remotely through an SSH connection.
Two options for use in the Terminal are the "diskutil" command, and the "fsck" command.
Apple recommends using diskutil whenever possible, but sometimes diskutil may show an error it cannot overcome, in which case fsck may be successful.
To use fsck, simply run the following command at the OS X Terminal prompt, changing the volume slice ID to be that of your boot drive: sudo fsck_hfs -f /dev/disk0s2 As with diskutil, this will result in an output that checks the various formatting database files and shows any potential problems.
To use the fsck command, you can run it with the following flags to perform the repair: sudo fsck_hfs -fy /dev/disk0s2 Keep in mind that when booted to the OS X installation or recovery drive, the "disk0" ID will likely now represent the recovery drive instead of the system's main boot drive.
A leader in environmental responsibility, they recycle aluminums, display assemblies & all the way down to the micro components on motherboards to reuse in future repairs.
On average, they save 2lbs - 3lbs of electronic waste over the average repair shop.
Do note that checking the hard drive will pause writing to it, and since the system is continuously writing and updating data on the drive, this may result in the system hanging for a few seconds while the checking routines run, so do not be alarmed if you see the spinning color wheel cursor and cannot perform other tasks while this routine is going on.
However, even if the system seems paused for a long time, the routine should resume sooner or later.