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- How to run spinrite 6 from dos command prompt install#
- How to run spinrite 6 from dos command prompt Pc#
- How to run spinrite 6 from dos command prompt mac#
įreeDOS supports vintage hardware IBM PC as well as modern ones, in addition to embedded computers. FreeDOS is currently at version 1.0, released on September 3, 2006. As a member of the DOS family, it provides mainly disk access through its kernel, and partial memory management, but no default GUI (although OpenGEM is listed on the official FreeDOS website). FreeDOS is made up of many different, separate programs that act as "packages" to the overall FreeDOS Project. GNU GPL with some freeware and shareware licensed utils įreeDOS (formerly Free-DOS and PD-DOS) is an operating system for IBM PC compatible computers. If not, you might have done something wrong (such as used a partition identifier like disk0s2 as the raw device instead of the whole disk).Free and open source with a few closed source utils It is worth checking that after SpinRite identifies available devices, that you see “GPT followed by MBR” as the partition type. Once the VM holds the lock on the target disk block device, MacOS will no longer be able to mount any volumes, so that (in this case) annoying automount behaviour will stop being a problem for us! If you see that error, double-check that no volumes from the target disk have been automatically re-mounted by MacOS. If all goes well, you can start the VM and you won’t receive an error about a device being in use. If you see any, unmount each of them in turn, like so: If any are mounted, you’ll see one or more identifiers, one for each partition on that physical disk that is mounted. On the host MacOS system, verify that there are no mounted volumes starting with disk0 (or your target disk identifier) when you run: That will obviously be the volume from which the VM boots. Make sure you then also add a CD-ROM drive and point that at your SpinRite ISO. Choose the vmdk image file we created earlier.Ĭhoose the ‘magic’ raw disk access VMDK file we created earlier. In our scarily privileged VirtualBox, create a new VM. You’ll need your SpinRite.iso file that you’ve generated by running the application from inside Windows, or through Wine/Crossover. (Note that you must invoke the executable directly, and not use something like open, or you won’t get root permissions.) Prepare a SpinRite VM Sudo /Applications/VirtualBox.app/Contents/MacOS/VirtualBox You can’t launch it using the UI, or interactively log in as root on MacOS, so we’ll do this from the command line: Normally running VirtualBox as root is crazy, but we do have a specific justified use case here! In order to read and write to a raw block device, we (sensibly) need rather elevated permissions. Substitute in the disk identifier of your target disk. Sudo /usr/local/bin/VBoxManage internalcommands createrawvmdk -filename raw.vmdk -rawdisk /dev/disk0 Assuming you didn’t elect to remove the VirtualBox Command Line Tools when you installed VirtualBox, run: When you are sure you have the right disk identifier, we need to create a sort of dummy disk image that redirects input and output to the raw disk. In my case, I’d booted from disk1 and the SpinRite target disk was disk0.ĭetermine the correct disk identifiers with: It is critical that you identify the BSD device name for the whole disk that you want to operate on. It’s certainly not an ideal situation to have to pull the plug on the computer while that VM has raw access to your target disk! Identify the Target Disk
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How to run spinrite 6 from dos command prompt mac#
Turn off screen savers, sleep timers and screen lock, just in case the VM has taken keyboard input away from you and you are unable to unlock the Mac to check on SpinRite’s progress. Make sure you have VirtualBox installed, with the optional Command Line Tools.
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I use SuperDuper to make bootable backups, and these work great for this purpose too.
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How to run spinrite 6 from dos command prompt install#
You’ll need a working MacOS install on another disk that you can boot from, as we need to unmount all the volumes on the disk to be scanned in order to gain raw access to the disk. All contractors must report to the site office. Hard hats must be worn beyond this point. Obviously, I do not accept any responsibility and cannot help if you break things by using these notes. Performing the wrong operations when you have raw access to the disk, a technique this process uses, can cause you to lose data.