I have a .sparseimage
that occupies 90GB of space on my hard drive despite only having 30GB of files in it. How can I reclaim the empty space used by the .sparseimage
and compact the file?
2 Answers
After some cursory searching, I found a forum post pointing to hdiutil
's compact
verb. From the man
page:
compact image
scans the bands of a sparse (SPARSE or SPARSEBUNDLE) disk image containing an HFS filesystem, removing those parts of the image which are no longer being used by the filesystem. Depending on the location of files in the hosted filesystem, compact may or may not shrink the image. For SPARSEBUNDLE images, completely unused band files are simply removed.
I ran hdiutil compact drive.sparseimage
and it successfully reclaimed almost 98% of the space.
(I guess it's one of those days... I should really learn to Google stuff first).
Edit: I tested compact
on a 1GB sparseimage
with just a few text files, and it ran quite quickly, but my Mac is taking quite a while to compact the 90GB image. Be prepared to wait.
-
1Prepare for hours of fun watching that second progress indicator creep to the right edge of the Terminal.– Daniel Beck ♦Commented Apr 25, 2011 at 14:35
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@Daniel I edited my answer a bit. I tested it on a smaller
sparseimage
and it ran quite quickly, but it's taking quite a while on the large image. It's times like these I'm thankful I upgraded to a 7200RPM hard drive!– squircleCommented Apr 25, 2011 at 14:41 -
It's related to how much reorganizing that task needs to do. It's usually pretty fast if you dump some files into the
sparseimage
, pull them back out, and them compact, since the system can just throw away those bytes.– Daniel Beck ♦Commented Apr 25, 2011 at 14:43 -
4If you get an error "hdiutil: compact failed – Function not implemented": apple.stackexchange.com/questions/132147/… Commented Feb 27, 2015 at 12:07
- Double click the
.sparseimage
file to open it - Empty the trash
- Eject the
.sparseimage
drive - Enter this into Terminal:
hdiutil compact path-to-file.sparseimage
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1I like the addition of "Empty the trash" I think that is a step that is easy to overlook.– EricCommented Sep 2, 2017 at 2:10