#HOW TO RESTORE A DMG TO USB INSTALL#
#HOW TO RESTORE A DMG TO USB FULL#
#HOW TO RESTORE A DMG TO USB MAC#

#HOW TO RESTORE A DMG TO USB INSTALL#

I got a new SSD and I am prepared to install it but first I need to create a new bootable USB with Mountain Lion on it to begin the process.

#HOW TO RESTORE A DMG TO USB MAC#

I need to install Mountain Lion on my Mac once again as the SSD is garbage.In your replies, please kindly take into account that I'm a French newbie with a fair level of ignorance of OSX command line technical slang, however not completely ignorant with computers either (one piece of paper even says I'm an engineer :), it's just that I don't understand what the buffer size technically means here.If you bought a new machine from Apple you have OS X 10.8 already installed вЂ“ but no back up disk! and since you havenвЂ™t bought the OSX Lion 10.8 App from the App store you canвЂ™t re-download it вЂ“ so thats why you have the recovery drive as a partition in your main hard drive, to boot from it you need to restart the machine and when it starts to boot hold down вЂњcommandвЂќ + вЂњrвЂќ keys. Does this mean the source data is sparsed over the destination disk by blocks of 131072 or 262144 bytes, thereby fragmenting the disk ? I'm curious if anyone can help me understand this. I notice the destLen (I suppose it means block destination length) 262144 is exactly the double of the bs=131072 that was used before. I'm currenlty getting tons of lines on my terminal screen that look like :Д¬ZlibDecompressor::decompressData: src 0x02E4AA97 srcLen 116073Д¬ZlibDecompressor::decompressData: dest 0x02E26000 destLen 262144Д¬ZlibDecompressor::decompressData: src 0x02E61F0D srcLen 20723Д¬ZlibDecompressor::decompressData: src 0x02E66B71 srcLen 1167

> how did you determine the 131072 size ?ДЇor my use I trusted blindly the example and used the bs=131072 option.

> what do you mean by that and how can I determine which buffer size is appropriate ? dmg file to an external disk.Дў) 'with an appropriate buffer size to copy over the whole block image, including partition table and boot sector' Many thanks to you and daveosborne for your hints !ДЎ) I'm currently dumping the content of a. (This hint originally appeared on my site.) I get around two terabytes a day of transfer rate I know of no way to skip sparse areas of the disk image, but could approximate it by dding the first few megabytes of the image, then using Apple System Restore to copy each volume individually.Д®xpect large speedups for sparse disks with this method. dd if=/dev/disk3 of=/dev/disk2 bs=131072Fourth, unmount everything and enjoy your copied disk. Note that it is extremely important on some hardware to use a large block size you can expect a 20x speedup over the case without blocksize parameter. dmg file as a block device only: hdid -nomount '/Volumes/Diotallevi/Clean Checkpoints/WDC Image.dmg'Second, determine the block device of the image and destination: diskutil listThird, use dd with an appropriate buffer size to copy over the whole block image, including partition table and boot sector. You must use Terminal, as Disk Utility does not support this use.ДЇirst, mount the. For this occasional task, the hdid utility is your friend. Luckily for us all, this task is possible! I hope to spare you much of the suffering I experienced with this hint. dmg file to be written to a raw disk or a block device. dmg file to be restored, nor did they allow a full-disk. Much investigation and much research followed: the image was not corrupt, but the graphical tools did not allow a multi-partition. Said date came all too soon, and I found myself accused by Disk Utility of offering it a corrupted image.

#HOW TO RESTORE A DMG TO USB FULL#

Like many others, I used Disk Utility to create a disk image (.dmg) from my full disk, with the expectation that I could restore this backup at a later date.

How to restore a dmg to usb