The filesystem appears to be fixed and the external drive is accessible again. Then I used Disk Utility's built-in filesystem repair function to bring the drive back to life. So I searched, found this thread, and made some progress with Ubuntu's built-in Disk Utility. No media was playing at the time, but the drive was not ready to be disconnected.Īs soon as I reconnected the drive to my Ubuntu machine, it mounted read-only. Today I mis-read the cues of the WD Media Center and unplugged my external drive prematurely.
QNAP CHECK FILE SYSTEM CANNOT UNMOUNT DISK MAC
I store all my media (DVD backups, music files, and more) on an external hard disk, formatted HFS+ (non-journaled) so it interoperates with my wife's Mac and with the Western Digital Media Center connected to our TV. I just experienced the same problem this morning, and this thread was very helpful for sorting out my problem. I reformatted it to ext4, and it's been much more robust. I never had that problem with XFS on drives mounted in a computer, but it was too fragile a filesystem to use on a device which could be accidentally disconnected or powered off.
I have one that I had formatted with XFS it fell over if I looked at it funny. Some filesystems are more fragile than others on external drives. You should also use "safely remove" if it's a USB device. If you must disconnect the external drive from some reason, umount the filesystems on it first. If the device is an external drive of some sort, chances are it wasn't unmounted properly some time in the past. Browsing through /var/log/syslog and /var/log/messages might help, too. First find out why the OS was only willing to mount the filesystem read-only. Sudo mount -n -o remount,rw /dev/sda1 /mnt/pointīut that's a last-ditch effort. You can force the system to remount the filesystem in read-write mode by using the command: Then try mounting it again and see if it's still read-only. You'll need to unmount it and run something like 'fsck /dev/sda1' to fix the errors. That's what usually results in a "read-only file system" error. It's likely that the filesystem has errors and was mounted read-only by the operating system.
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