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Apple Computing Products:
macOS - Operating System
USB Thumb Drive Won't Do HFS+ Format
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<blockquote data-quote="markbyrn" data-source="post: 1235420" data-attributes="member: 162542"><p>I've been trying to format a 128 GB USB thumb drive as a Mac OS Extended volume (HFS+) but it silently fails and the only successful format I can do is MS-DOS FAT. As I want to use the drive to install a dev version of Lion, I need the HFS+ format and trying it in terminal gave the following result: </p><p></p><p>Marks-MacBook-Pro:~ markbyrn$ diskutil eraseDisk HFS+ lion disk1</p><p>Started erase on disk1</p><p>Unmounting disk</p><p>Creating the partition map</p><p>Waiting for the disks to reappear</p><p>Formatting disk1s2 as Mac OS Extended with name lion</p><p>Initialized /dev/rdisk1s2 as a 128 GB HFS Plus volume</p><p>Mounting disk</p><p>Could not mount disk1s2 with name (null) after erase</p><p>Finished erase on disk1</p><p>Marks-MacBook-Pro:~ markbyrn$ </p><p></p><p>So it appears to initialize but won't mount. I also tried partioning the drive into 2 or 4 partitions and formatting an individual partition but that didn't work either. </p><p></p><p>I have installed the dev version (preview 2) of Lion on a 16 GB thumb drive but there's not enough free space to do an update to preview 3. Any advice on how I can get this 128 GB thumb drive formatted?</p></blockquote><p></p>
[QUOTE="markbyrn, post: 1235420, member: 162542"] I've been trying to format a 128 GB USB thumb drive as a Mac OS Extended volume (HFS+) but it silently fails and the only successful format I can do is MS-DOS FAT. As I want to use the drive to install a dev version of Lion, I need the HFS+ format and trying it in terminal gave the following result: Marks-MacBook-Pro:~ markbyrn$ diskutil eraseDisk HFS+ lion disk1 Started erase on disk1 Unmounting disk Creating the partition map Waiting for the disks to reappear Formatting disk1s2 as Mac OS Extended with name lion Initialized /dev/rdisk1s2 as a 128 GB HFS Plus volume Mounting disk Could not mount disk1s2 with name (null) after erase Finished erase on disk1 Marks-MacBook-Pro:~ markbyrn$ So it appears to initialize but won't mount. I also tried partioning the drive into 2 or 4 partitions and formatting an individual partition but that didn't work either. I have installed the dev version (preview 2) of Lion on a 16 GB thumb drive but there's not enough free space to do an update to preview 3. Any advice on how I can get this 128 GB thumb drive formatted? [/QUOTE]
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Apple Computing Products:
macOS - Operating System
USB Thumb Drive Won't Do HFS+ Format
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