#Couldnt unmount disk mac os pro#
The USB came pre-formatted as they usually do, with the FAT filesystem and some files for backup etcĢ) I only have a Macbook Pro (MacOS 10.14.4) to hand, but I needed to format the stick to ext2 which is not as straight forward as you might like. My scenario was different in that ġ) I had bought a brand new Sandisk 32GB USB Stick which I needed to use on a different unix distro later. I had a similar issue to the OP so I thought I would share what I found. You mention that the partition table is lost, but the output from diskutil list suggests your partition tables seem to be OK.Ĭan you elaborate a little more about the problem you were having? However, aside from the issues above, I'm not exactly sure what the problem is. Unfortunately, they make manipulating the partitions more difficult, and take many disk/partition recovery products off the table.
#Couldnt unmount disk mac os free#
That should free them up so the gpt command will stop giving you the resource busy error.įusion Drives use Apple CoreStorage partitions as containers, which is sort of analogous to Microsoft's Dynamic Disks. Of course, nothing is mounted on /dev/disk1 or /dev/disk2, so you will have to issue a diskutil unmountdisk /dev/diskN for those. If you type umount /dev/disk3, that should work. It is the combined capacity of /dev/disk1s2 and /dev/disk2s2. You are absolutely correct that /dev/disk3 is not a 'real' disk. dev/disk0s3), although in your case, you have a Fusion Drive. Typically only partitions are mounted (e.g. Secondly, your umount commands above are failing because /dev/disk1 and /dev/disk2 are not mounted.
How could I get rid of this message? I've tried restarting both the iMac and the computer that it is connected to.įirst off, the pdisk command is used to modify drives that are partitioned using an Apple Partition Map. I have the iMac plugged into another computer via thunderbolt, and by holding t when the iMac started up, the Macintosh HD showed up as an external device on the other computer. I've tried with the SSD, /dev/disk2, but I get the same result. The iMac has a fusion drive, and /dev/disk1 is the HDD. dev/disk5 - I have no clue what this is either. I would assume it is the combined HDD and SSD of the iMac. dev/disk0 - The disk of the computer that the iMac is connected to. Here's a list of all of the disks connected to the computer, found by running sudo DiskUtil list: I get a message saying that the device is not currently mounted: I've also tried unmounting the device by running sudo umount /dev/disk1 as well as sudo umount /dev/rdisk1.
So, I try to see what is using the resource by running sudo lsof /dev/rdisk1, as well as sudo lsof /dev/disk1. Interestingly enough, the I only get a result from /dev/rdisk3: I also tried running sudo gpt /dev/(r)disk(1-3).
I get the same result when using /dev/disk1, /dev/rdisk2, and /dev/disk2. Pdisk: can't open file '/dev/rdisk1' for writing (Resource busy) Once I try running the i command, I get an error message saying that the resource is busy: And I can't erase the drive to get a brand new drive to work with.I am trying to repair a lost HSF+ partition table an iMac by running the i command inside of sudo pdisk /dev/rdisk1. I backed up my startup drive to this drive so I could wipe and reinstall OSX on my new SU drive but now I can't delete items off the backup drive because the message says I can't delete backup items. I have backed it up and using DU tried to erase it = by both highlighting the drive identifier and the name - in both cases, whether I try to erase disk or set it to erase to one partition, I get a message saying it can't do it because it can't unmount the disk. I have a MacPro and 4 drives inside it, one of which I need/want to erase.
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