I am trying to repair a lost
HSF+ partition table an iMac by running the
i command inside of
sudo pdisk /dev/rdisk1. Once I try running the
i command, I get an error message saying that the resource is busy:
pdisk: can't open file '/dev/rdisk1' for writing (Resource busy)
I get the same result when using
I also tried running
sudo gpt /dev/(r)disk(1-3). Interestingly enough, the I only get a result from
So, I try to see what is using the resource by running
sudo lsof /dev/rdisk1, as well as
sudo lsof /dev/disk1. Nothing shows up:
I've also tried unmounting the device by running
sudo umount /dev/disk1 as well as
sudo umount /dev/rdisk1. I get a message saying that the device is not currently mounted:
Here's a list of all of the disks connected to the computer, found by running
sudo DiskUtil list:
/dev/disk0 - The disk of the computer that the iMac is connected to.
/dev/disk1 - The HDD of the iMac.
/dev/disk2 - The SSD of the iMac.
/dev/disk3 - I don't know what this is. I would assume it is the combined HDD and SSD of the iMac.
/dev/disk4 - An external hard drive.
/dev/disk5 - I have no clue what this is either. Maybe utilities for /dev/disk4?
The iMac has a fusion drive, and
/dev/disk1 is the HDD. I've tried with the SSD,
/dev/disk2, but I get the same result.
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.
How could I get rid of this message? I've tried restarting both the iMac and the computer that it is connected to.