OS X BOOT DISK MAC
Your Mac isn’t starting correctly and you’re not sure if the internal hard drive is failing or if another piece of hardware is to blame.Not sure when having OS X loaded on a flash drive would come in handy? Here are just a few examples: It turns out a tiny USB flash drive serves as a great alternative. That means carrying around a bulky external hard drive with cables is not always ideal. And since most Mac owners use a MacBook of some kind nowadays, portability is a valuable thing. A clean installation of the operating system can help pinpoint problems and will come to the rescue in a bind.
OS X BOOT DISK MAC OS X
One of the maintenance tools every Mac user should have available in case of emergency is a bootable copy of Mac OS X on a removable device. All you need to do is carry around a single USB flash drive to be ready for situations the require you to diagnose, repair, or experiment with Mac OS X. Questions? Comments? Have a fix? Post them below or e-mail us!īe sure to check us out on Twitter and the CNET Mac forums.Although Macs are reliable machines, they are not exempt from hiccups.
OS X BOOT DISK HOW TO
Update: Added brief descriptions of how to perform each of the three repair tasks. This is why on various Unix-based systems you may see fsck_hfs, fsck_msdos (for Windows "FAT" file systems), and fsck_ufs/fsck_ffs as available options in addition to the standard fsck command. However, for support of additional file systems, instead of heavily modifying the fsck program, many operating systems include separate fsck-like tools that are specific for the file systems being used. If you use Safe Mode, then the check and repair will only run once before the system boots.įor those who might be a bit confused by the need for multiple fsck variants, the main "fsck" command contains support for a number of common Linux and Unix filesystems. If you decide to use "Single User Mode" or Disk Utility, you have the option to run the checking routine multiple times until you can confirm all errors have been corrected.
Overall if your system has crashed or is experiencing problems, it does not matter what method you use to run a consistency check since all will use the same method for checking the HFS volume. Running Disk Utility either from the boot drive or from an installation disk will use the "fsck_hfs" tool on HFS and HFS+ volumes. Running the "fsck" tool directly will launch the "fsck_hfs" tool on HFS and HFS+ volumes.ĭisk Utility: After booting from an alternative boot disk and launching Disk Utility, you can run this routine by clicking either the "Verify Disk" or "Repair Disk" buttons with the desired drives selected. Single User Mode with "fsck": After pressing Command-S at boot to get to the single-user command prompt, people usually run the command "fsck -fy" to do this. Safe Mode: If you boot into Safe Mode by holding Shift at startup, the system will perform a file system consistency check using the "fsck_hfs" tool. As a result, the following scenarios end up doing the same thing:
OS X BOOT DISK VERIFICATION
When you use either fsck or Disk Utility for checking the boot drive on a Mac, both tools will first check the drive's format and then run the verification and repair using the "fsck_hfs" tool which is specific for the HFS and HFS+ file systems. The quick answer is "absolutely nothing." The question that has been brought up is, what is the difference between these methods? There are several common ways to do this, which include booting to Safe Mode, Booting to Single User mode and running "fsck," or booting to the installation DVD and running Disk Utility. When a Mac either has problems booting, is experiencing slowdowns, or has just recovered from a crash or power outage it's good to at least verify that the file system structure has not been compromised. One question that has been brought up recently is which disk-checking practice is best when performing maintenance on your system.
0 kommentar(er)
