![]() To erase and format any drive connected to a Mac computer running OS X Yosemite, use Disk Utility. Simply erasing a USB drive in Disk Utility will automatically format it too. Because there are different types of formats for different purposes, it's good to know the differences before accepting the default settings. Format USB Key with Linux; Format USB Key on Mac OS; Formatting a USB Key Before beginning, it's important to choose which kind of file system you'd like to use. Depending on the needs of the user, a USB key can be formatted with the FAT file system, (including FAT16 or FAT32), or NTFS system. Usb drives are great and portable, but they don’t always work on every type of computer. This is because not all file systems for USB’s are compatible. Here’s how to fix it: -Copy any important data from the drive, because EVERYTHING WILL BE DELETED! -Right click on the drive, and select 'Format' -Choose exFAT or FAT32. Fat32 limits file size to 4GB, so I prefer exFat. More Info on File Systems -Set the 'Allocation Unit Size' to 4096 kilobytes or 8292 kilobytes -Change the 'Volume Label' (this is the name of the drive) -Make sure 'Quick format' is checked and click 'Start'. I needed to format a partition to ext3 on my USB flash drive. The drive was already formatted, and had 3 partitions, and I wanted to convert partition 1 from FAT32 to ext3. • install brew, visit • install e2fsprogs using brew install e2fsprogs • figure out the name of your partition or drive using diskutil list -- in my case, my partition had was on disk2 and had the identifier of disk2s1 • sudo $(brew --prefix e2fsprogs)/sbin/mkfs.ext3 /dev/disk2s1 but you may need to change the drive from disk2s1 to the partition or drive that you want to format. This command will ask you to verify the name of the partition, just to be sure:) Note, if you're able to ssh/telnet into your router running dd-wrt or tomato, you can already directly run mkfs.ext3 directly in the router, and don't need to do anything on your mac at all. There is the commercial product with which you can format even ext4 - I use it from time to time to access ext3 external hdd and it works quite well. From their website: Full read/write access to Ext2 / Ext3 / Ext4 partitions under Mac® OS X Transfer rate is similar to the native Mac® OS Extended file system performance Auto-mounting of Ext2 / Ext3 / Ext4 volumes Full support of OS X 10.10 Yosemite! No affiliation or whatsoever. There is also as described in this artticle, but I do not think you can format a hdd with it. Otherwise I agree with ScunnerDarkly - install linux in a virtual machine - or run a live disk (e.g. ) in a Virtual Machine, which might be the easiest.
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March 2019
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