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Old 04-26-2008, 03:52 AM
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naquaada naquaada is offline
 
Join Date: Jan 2008
Location: Germany
Posts: 1,216
Using Disk Utility as compressor

Disk Utility can save disk images compressed. if you activate the special options with Onyx, you also can compress in bzip2 format which is very effective. I still have the importantst OS X images as DVD images on my harddisk. But I converted them in bzip2 format and this saves a lot of size. Other examples: My MIDI collection were uncompressed about 3,1 GB. bzip2-compressed they only need 700 MB! A small collection of 4 videos (quicktime and divX format) were uncompressed 96 MB, compressed only 37. That's a good ratio for already compressed files.

Disk Utility has an option 'File/New/Image from Folder' in the menu. This allows easily to convert a folder in a disk image, this is the easiest way to compress files for mailing or for rapidshare.

The most important aspect of an compressed dmg: You have access to them without decruncing! If you want to access files from a normal archive, you have to decompress the whole stuff on the HD first, even if you only need one file. This uses a lot of space. A .dmg could be used like a harddisk. In my case, I always have access to my MIDI files without to decompressing them to my HD first.

2 Opteron systems: OSx86 10.5.8, Andy's 9.8.0 kernel, Asus A8N-SLI Premium, Opteron 185 o'clocked @ 2 x 2,95 GHz (2nd system 2.6 GHz), ATI Radeon HD2600XT 256MB Dual-Monitor 2x HP L2035, 4 GB RAM, Griffin FireWave as main audio device, Marvell + nForce LAN, Asus U3S6 USB3/SATA6 card, 5,5 TB harddisk, Firewire 800 card, Apple Remote + eHome IR receiver, 2x Wacom serial graphics tablet, Canon Pixma iP4700, Logitech Internet Navigator wireless keyboard/mouse combination.

My Audio stuff: M-Audio Transit USB (default audio), M-Audio ProFire 610, M-Audio ProFire Lightbridge (34 channels) using Creamware A16 ADAT converter MIDI: M-Audio Midiman 4x MIDI interfaceBehringer Audio Mixers: Xenyx 1002, Xenyx 1002FX, Xenyx 1202FX, Eurorack UB1002FX, Eurorack MX1804FX, Eurorack MX262A • FX devices: Lexicon MPX100 DSP, Behringer DSP-1000 Virtualizer, Behringer MiniFEX 800 DSP, Behringer Multicom Pro MDX4400 compressor RETRO: MSSIAH midi/sequencer/synthesizer cardridge for the C64 (Dual-SID), Steinberg M.S.I. MIDI Interface for C64
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