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+--- Thread: [SOLVED] Can't reformat btrfs USB drive (/thread-2039.html)
[SOLVED] Can't reformat btrfs USB drive - dstuart - 20th Jan, 2014 06:30 AM
Hi,
So I used a USB drive to install an earlier Xbian package (I've since moved back to just using an SD card), but I've just grabbed it to reformat and use it with my Mac, and am unable to reformat it.
Terminal
root@xbian:~# sudo mount /dev/sdb1 /mnt
mount: block device /dev/sdb1 is write-protected, mounting read-only
root@xbian:~# mount -o remount,rw /dev/sdb1
mount: cannot remount block device /dev/sdb1 read-write, is write-protected
mount: block device /dev/sdb1 is write-protected, mounting read-only
root@xbian:~# mount -o remount,rw /dev/sdb1
mount: cannot remount block device /dev/sdb1 read-write, is write-protected
Terminal
/dev/sdb1 on /mnt type btrfs (ro,relatime,space_cache)
Anyone got any ideas to make this drive usable again?
Thanks
RE: Can't reformat btrfs USB drive - IriDium - 21st Jan, 2014 05:42 AM
Why don't you just reformat in on the Mac or any other machine?
I'm also concerned why it's not automounting.
Can you provide the output of
dmesg - via pastebin
df -h
mount
RE: Can't reformat btrfs USB drive - dstuart - 26th Jan, 2014 11:31 PM
Hi IriDium, that would of course be the easy option!
Sorry, I didn't make it too clear. I'm unable to format it on a Mac, Windows, or any other machine. Everything I've tried just kicks out the same response; along the lines of "Read-only disk", "Disk is not readable", or "Write-protected".
Here's the output as requested. (Note: the drive seems to be showing up as sda1 now; the systems been updated since my first post).
Pastebin
RE: Can't reformat btrfs USB drive - koper89 - 26th Jan, 2014 11:52 PM
Try gparted, just try to delete partitions and repartition it once again
RE: Can't reformat btrfs USB drive - dstuart - 27th Jan, 2014 02:54 AM
(26th Jan, 2014 11:52 PM)koper89 Wrote: Try gparted, just try to delete partitions and repartition it once again
Same story!
I'm about giving up to be honest. Waste of a good USB, but the effort spent really isn't worth it.
RE: Can't reformat btrfs USB drive - koper89 - 27th Jan, 2014 02:59 AM
Quote: Optionally if gparted can't delete the partitions, you could use dd to clear the device.Source: http://superuser.com/questions/612964/installed-ubuntu-on-usb-drive-now-its-read-only-and-cant-be-formatted
Type sudo bash in the terminal of gparted.
Type in dd if=/dev/zero of=/dev/sda bs=4k conv=notrunc
And replace sda with whatever the gparted software shows it as being, sdb, sdf, sdz, etc.
RE: Can't reformat btrfs USB drive - dstuart - 27th Jan, 2014 04:03 AM
Terminal
user@debian:~$ sudo bash
root@debian:/home/user# dd if=/dev/zero of=/dev/sdb bs=4k conv=notrunc
dd: failed to open '/dev/sdb': Read-only file system
root@debian:/home/user#
root@debian:/home/user# dd if=/dev/zero of=/dev/sdb bs=4k conv=notrunc
dd: failed to open '/dev/sdb': Read-only file system
root@debian:/home/user#
RE: Can't reformat btrfs USB drive - merike - 8th Feb, 2014 04:24 AM
I had the same problem, finally I found solution. I used phison format & restore v3.9.0.0 - use restore ntfs.
http://www.usbdev.ru/post-psrestore3900-m0704/
RE: Can't reformat btrfs USB drive - dstuart - 10th Feb, 2014 05:49 AM
(8th Feb, 2014 04:24 AM)merike Wrote: I had the same problem, finally I found solution. I used phison format & restore v3.9.0.0 - use restore ntfs.
http://www.usbdev.ru/post-psrestore3900-m0704/
@merike I LOVE you.
I'd spent more hours on this than I'd care to admit! I'd pretty much concluded it a lost cause. Thanks so much