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. 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: I'm writing this as I search for it and found solutions and none of them worked and I noticed I wasn't the only one.Įasy solution is hold down command + R and get into disk utility, select the main HD and select File > "Enable journaling" but if you are like me, it was greyed out.I am trying to repair a lost HSF+ partition table an iMac by running the i command inside of sudo pdisk /dev/rdisk1. What the issue is, you are trying to modify the drive you are currently working on which it doesn't like. You need to create a USB flash installer, then reformate the drive then reinstall. The easiest way to create a USB flash installer is with the free program, Disk Creator.Download the macOS Sierra installer and Disk Creator.If you have any other data on that flash drive, back it up now, because the installer will delete everything on it.Verify and Repair volume Storage Error: Could not unmount disk. ![]() ![]() Open Disc Creator and click the “Select the OS X Installer” button.If I try to unmount from Finder, I receive this message: The disk Storage wasn’t ejected because one or more programs may be using it. After i boot it from original MacOs DVD i tried the following.Once it loads, go into Disk Utilities and Erase the main drive and select the journaling formate style.Step 2 (now that you are booted on a the USB stick and not the main HD): When it’s done, insert your USB drive into any Mac, then launch the installer by holding down the Option key.Select your flash drive from the drop-down menu.This is should be located in your Applications folder. Then choose to reinstall the OS and the disk will not be greyed out this time. (1) Repair with Disk Utility - upon the process, two allert messages appear - 'Volume bitmap needs minor repair for underallocation' and 'Volume header needs minor repair'. Finnaly i have 'Was repaired successfully' from it. (2) I could also Verify disk permissions successfully.
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