Defrag OSX (disk defragmentation in OSX) - Tekzilla

[zitianaki]

you dont need to defrag macs?

[darthirakli]

I wonder why 'Repair Permissions' speeds things up. Is it just a placebo?

[mauricejbarry]

shut the f**k up and get on with it idiots!

[nielsbragger]

please!!! STFU and cut to the case!

[daveRobinsonUK1]

UNIX systems like OSX on the other hand place files in random locations within the volume so when the file increases in size there is room for this on either side and no need to break the file blocks up.

Its also possible that you a defrag program could reduce system performance by changing the location of frequently used system file.

If you have a performance issue, the best advice with UNIX is to backup your work and then low level format the drive and reinstall the system.

[daveRobinsonUK1]

Actually I think you'll find that it doesn't need to, the same as all UNIX systems do not need to.

The reason for this is the way in which the file system operates. In a FAT based format the files are placed as close to the beginning of the volume as possible to enable quick retrieval. However, when the file size increases, the file is fragmented and these fragments are placed again as close to the beginning of the volume as possible, though this is never directly after the original file block

[dorni82]

yea it does autodefrag

[alexlovett1991]

that did not help me in anyway whatsoever...

[daveRobinsonUK1]

that was fucking useless! Oh and another thing. OSX does not autodefrag, this is a myth.

[darthirakli]

@daveRobinsonUK1 OS X does automatically defrags certain types of files. When OS X accesses a file it tests if:

the file is smaller than 20MB

the file is not already busy

the file is not read-only

the file has more than 8 extents ('fragments')

If ALL these conditions are satisfied, the file is defragmented on the fly.

[LordxSPRINKLZx]

shitty

[Sharpblue]

I use ONYX, this works fine.