Article 5C8AV cannot mount device read-write

cannot mount device read-write

by
no-windose
from LinuxQuestions.org on (#5C8AV)
I cannot mount read-write an encrypted device. May I ask what the problem is?

Quote:
# cryptsetup luksOpen /dev/sda target
# mount /dev/mapper/target /media/usb
# cd /media/usb
# touch testfile
touch: testfile: Read-only filesystem
# chmod 777 /media/usb
chmod: /media/usb: Read-only filesystem
# mount -o remount,rw /dev/mapper/target /media/usb
mount: /media/device: cannot remount /dev/mapper/target read-write, is write-protected.
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