#Format mac disk terminal verification

Just as before, I’ll use SD as my drive identifier. Repairing the DiskĪssume, for a moment, that the disk did come back with an error or needing repair. To repair a disk from the command line, type or paste the following command into terminal: diskutil repairvolume /Volumes// and press Return. If there was an error I would see a message that reads: The volume was found corrupt and needs to be repaired. So I can be confident in the drive and its ability to store data. You will see something that looks like this: Verifying a Disk via Terminal in OSX If you are targeting the Mac's hard drive you can also simply use a /.

#Format mac disk terminal verification

To start the verification process, type the following command, while being sure to substitute the portion for the actual name of the drive. Once you have the list of disks, you can target one or many of them for verification and repair. You’ll be shown a list of disks attached to your Mac. The Terminal window should now look very similar to this: Accessing the Volumes directory from the OSX Terminal So to switch to the Volumes directory, open Terminal and type or paste in this command: cd /Volumes. In the terminal a /is known as the root, or lowest level, directory. The command used to switch from directory to directory is cd. This directory is located one step away from the root of the Mac. If you aren't at least a bit comfortable in Terminal, you may want to stick to the graphical user interface applications like Disk Utility.Īll of the disks that are attached to the Mac are located within the Volumes directory in Terminal. These instructions are not meant for novice Mac users.If you need to target your Mac's hard drive, make sure you substitute the word Macintosh HD for SD in any of the commands I am showing in this article. I will be working on an SD Card I have inserted into my mac.Format of $sDisk ($sDiskSpace) aborted.'Įcho 'You did not confirm Format of $sDisk ($sDiskSpace) aborted.How to Verify and Repair a Disk From the OS X Command Lineīefore I take you any further, you need to understand a couple of things: # say 'Format of $sDisk ($sDiskSpace) aborted.'Įcho 'Format of $sDisk ($sDiskSpace) aborted.' Format of $sDisk ($sDiskSpace) aborted.'Įcho 'You did not provide a choice Format of $sDisk ($sDiskSpace) aborted.' Sudo diskutil eraseDisk 'ms-dos fat32' EMPTY MBRFormat $sDisk & say 'Disk Is Formatted' Sudo diskutil secureErase 'ms-dos fat32' EMPTY MBRFormat $sDisk & say 'Disk Is Formatted' # If you want to securely format the disk

Sudo diskutil zeroDisk $sDisk & say 'Disk Ready' # sudo dd if=/dev/urandom of=$sDisk bs=1000000 & say 'Disk Ready' Sudo diskutil unmountDisk $sDisk & say 'Unmount of disk completed' Printf 'Do you want to do a secure format $sDisk ($sDiskSpace), if yes type y or if no (regular format) type n followed by : ' # say 'Do you want to do a secure format $sDisk ($sDiskSpace), if yes type y or if no (regular format) type n followed by ' Printf 'Are you sure you want to format $sDisk ($sDiskSpace), if yes type y or if no type n followed by : ' # say 'Are you sure you want to format $sDisk ($sDiskSpace), if yes type y or if no type n followed by ' # Ask User if they are sure they want to format the disk SDiskSpace='$(diskutil list | grep $sDisk -A2 | grep -v $sDisk | grep -v 'SIZE' | tr -s ' ' | cut -d ' ' -f4 | sed 's|||g') $(diskutil list | grep $sDisk -A2 | grep -v $sDisk | grep -v 'SIZE' | tr -s ' ' | cut -d ' ' -f5)' Printf 'What disk would you like to format? Copy/Paste or type in the disk path (ex. Copy/Paste or type in the disk path followed by ' # say 'What disk would you like to format?. This script can be updated to allow a different type of format (JHFS+ instead of FAT32) but for now it serves my purpose. This process is very helpful to format a disk that has multiple partitions on it like a Raspberry Pi SD Card.