Comments (10)
RJVB
commented on July 21, 2024
1
Can you please check with the latest commit?
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RJVB
commented on July 21, 2024
1
I'm inclined to leave that to users of said tools, which I'm not. After all, why would the devs add support for something for which there's no user demand?
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gingerbeardman
commented on July 21, 2024
this seems to be virtual memory. is your hard drive definitely ok? could it be failing?
how much VM was being used?
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RJVB
commented on July 21, 2024
how much VM was being used?
And (more) importantly, how much free space do you have on the drive?
If you're short on space it can be a good idea to deactivate the verify/backup feature (-n option); this will probably reduce memory requirements too.
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biziclop
commented on July 21, 2024
I don't remember where did I experiment first time, but this time GSmartControl warned about soft read errors, so I'll have to experiment more with another disk. Both the external drive hosting the large file and the startup disk have plenty of space (30+GB).
Anyway, I ran an experiment with just one file (a copy of an OSX installer image around 6-7GB). It took quite long, it ate all RAM, etc., but it apparently compressed the file, released all the memory. But at the verification phase (I think) it kernelpanicked again. I compared the compressed copy with the original with another tool, and … panic again. Copied the file to another drive, tried to open it, zip it, but they complained about "invalid argument" or such. afsctool -d image.dmg said that the (otherwise almost incompressible) file occupies 4GB on disk. Finder's Get Info said 6GB (compressed) 2GB on disk.
So it's funny. But as I said I have to test this more. Anyway, thanks for replying!
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RJVB
commented on July 21, 2024
I thought I disabled the support for files > 2Gb?!
Such files could be stored in a compressed disk image, which also means the much more capable bzip2 compressor can be used.
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biziclop
commented on July 21, 2024
I actually made a service to Finder to (re)compress disk images, but this time I just sent afsctool to every old & forgotten file in a folder, because why not. This sh*t is somehow addictive :)
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biziclop
commented on July 21, 2024
Can you please check with the latest commit?
So far it works and when file is too big, it properly emits with unsupportable size.
Thanks! :)
BTW, maybe this useful tool could be promoted among developers who offer .dmg images with "drag this to the Applications folder to install". Gimp, LibreOffice, VirtualBox are compressed to less than the half of their original sizes. My top (by size) 3rd party apps are 29GB uncompressed, but became 14GB after compression. On small SSDs, this can be quite a huge saving.
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gingerbeardman
commented on July 21, 2024
BTW, maybe this useful tool could be promoted among developers who offer .dmg images with "drag this to the Applications folder to install".
I agree, perhaps @biziclop can ask the most popular DMG creation apps to add support?
- DropDMG
- Create DMG
- etc
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gingerbeardman
commented on July 21, 2024
Yes, I meant @biziclop who raised the point.
I also think that Sparkle Updater framework could be educated in the same way about HFS+ compression.
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Related Issues (20)
- Is this afsctool the clear successor to the original? Should the homebrew afsctool formula point here instead? HOT 4
- Does your afsctool support APFS? HOT 2
- Unable to build LZVN on apple m1 HOT 15
- building for macOS-x86_64 but attempting to link with file built for macOS-arm64 HOT 8
- About maintenance of the fork HOT 3
- Is this identical to 'brew install afsctool' or is that the original version? HOT 4
- Failed to build on M1 - Monterey 12.0.1 with Xcode 13.1 HOT 11
- Process stuck waiting HOT 12
- Are we ready for a new release? HOT 3
- Unable to build when the path to Xcode contains spaces HOT 3
- Build errors with GCC 5 HOT 9
- Recovering missing/deleted files HOT 4
- Time Machine risks? HOT 3
- Incorrect license HOT 4
- -t and -i options usage HOT 10
- afsctool breaks binaries, sometimes (HFS+) HOT 9
- Compress, decompress, compress results in lots of mismatch errors HOT 19
- compressing breaks app (workaround: restart mac) HOT 25
- Cannot build HOT 11
- Build problems with macOS Sonoma HOT 1
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