If you run a defragmentation utility program, it simply finds every fragmented file on the drive, and then reorders and rewrites all the data more neatly. It can take noticeably longer to read and write files on a badly fragmented drive, simply because the read/write heads have to jump about between the individual fragments, rather than smoothly moving through a single contiguous file. In time, the contents of the drive can therefore become extremely 'fragmented', and individual files may end up split into small chunks scattered about on the disk. Once there is a gap in the drive where a file used to be stored, the next time you save any file it may use this gap to store part of its data, and then store the remainder in another empty part of the drive. Martin Walker replies: All hard drives get fragmented, simply because we all have occasion to delete files. I'm sure that defragging would speed up audio access, but I want to make sure before I attempt anything. What is the situation with defragmenting audio drives? I don't generally use long streams of audio for multitrack recording, preferring to drop samples into my sequencer (if you see what I mean). DiskWarrior also helps to rebuild HFS+ catalogs in addition to the already mentioned Drive Genius.īest of luck - keep looking if you find defrag isn't what the doctor ordered on your mac.Norton Speed Disk, ready to pounce on an unsuspecting hard drive and round up scattered file fragments. Back up to time machine and an erase install / migration back cures that issue without needing to spend money on a live tool. The HFS+ filesystem directory / catalog itself can become fragmented over a long time but you can fix that easily. Mac OS X automatically defragments files that are likely to cause a slowdown in addition to automatically optimizing hot (often used) files to a fast and not-fragmented part of the drive. There aren't many apps that do this on mac since actual filesystem fragmentation both rare and rarely a cause of measurable slowdown. You don’t need to rearrange the files on the drive as macOS does that for you - just keep 20 GB free or 25% free if you can, and the system optimizes the file location automatically. It rebuilds the catalog (filesystem) that tracks the files. On APFS - you don’t need to defragment anything.
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