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Splitting up a single DMG file?

V

Vegeta-san

macrumors 6502
Original poster
Aug 4, 2006
432
0
I'm shipping off my MBP to Apple shortly, and I'm thinking of backing up by making one DMG file of my entire hard drive. Unfortunently, I have nothing that can hold a single 150 GB DMG partition, so is there any way to split one DMG into several pieces that will recombine themselves when needed? Thanks.
 
the command line utility hdiutil supports segmenting.

From hdiutil's manpage:

Code: 
    Segmenting:
           hdiutil segment -segmentSize 10m -o /tmp/aseg 30m.dmg
               creates aseg.dmg, aseg.002.dmgpart, and aseg.003.dmgpart
 
SC68Cal said:
the command line utility hdiutil supports segmenting.

From hdiutil's manpage:

Code: 
    Segmenting:
           hdiutil segment -segmentSize 10m -o /tmp/aseg 30m.dmg
               creates aseg.dmg, aseg.002.dmgpart, and aseg.003.dmgpart
Click to expand...

Thank you... I always had the thought of the possibility of splitting image files.
 
How much is your data worth?

You can buy an external 200 GB ready-to-go external drive very cheaply these days ($70 odd for USB 200 gig). If you can afford a MBP, you can afford one of these.

You should be taking regular backups anyway. If you're busy, get a 200 gig usb and make a DMG image.

If you're poor, i.e. not busy and have spare time, then backup important info (My Documents, Library/Mail, etc) onto DVD. Not every one of the 160GB on your drive is worth backing up.
 
Usually if you just back up your home folder, that allows you to move it between computers.
 
SC68Cal said:
the command line utility hdiutil supports segmenting.

From hdiutil's manpage:

Code: 
    Segmenting:
           hdiutil segment -segmentSize 10m -o /tmp/aseg 30m.dmg
               creates aseg.dmg, aseg.002.dmgpart, and aseg.003.dmgpart
Click to expand...

I'm sorry, but what is this? I have no idea what to do with this except open Terminal and throw it in....What is "hdiutil manpage"? Please explain this to me like I am the most noob noob you know. Thanks.
 
Splitting up a DMG File

I've not used it but I believe the application DMG Converter has a Segment option that would provide a GUI interface for segmenting a DMG file. It can be located on VersionTracker.
 
cp1160 said:
I've not used it but I believe the application DMG Converter has a Segment option that would provide a GUI interface for segmenting a DMG file. It can be located on VersionTracker.
Click to expand...

DMGConverter

just segmented a dmg (pretty useful for moving around large files on my 1 Gb USB drive) although for the original OP this may not be an option as you need something big enough to store the 160Gb dmg on first.
 
Ok i just split up a 525mb .dmg file into 3 different parts around 175mb each using DMG Converter. When I move them to my new computer how to i combine them back up?
 
Why don`t you try machacha, the mac version from windows' Hacha. Supeasy and fast program to cut and join files. Specialy recomended (hacha it's the spanish word of "axe")
 
netracer said:
Why don`t you try machacha, the mac version from windows' Hacha. Supeasy and fast program to cut and join files. Specialy recomended (hacha it's the spanish word of "axe")
Click to expand...

I couldn't find it. Any other recommended resources tobind my 3 segmented .dmg files back into one? How to make humpty dumpty whole again?
 
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