I've been mounting it with
sudo mount -t ntfs -o umask=000 /dev/sda1 "/media/My Book" but for some reason it now says
mount: warning: /media/My Book/ seems to be mounted read-only when I do so, and
ls -l shows it's correct. The drive has its own power supply and it works fine with my laptop, so I think the problem must be with the Pi. What am I doing wrong?
Update: Just to be clear, that command used to work, and it's read-only for EVERYONE, even root:
$ ls -l /media total 8 dr-xr-xr-x 1 root root 4096 Apr 28 11:11 My Book
The contents appear the same way.
Update 2: Probably found the cause. From
May 17 19:37:52 raspberrypi kernel: [ 64.688724] NTFS driver 2.1.30 [Flags: R/W MODULE]. May 17 19:37:52 raspberrypi kernel: [ 65.195397] NTFS volume version 3.1. May 17 19:37:52 raspberrypi kernel: [ 65.195439] NTFS-fs error (device sda1): load_system_files(): Volume is dirty. Mounting read-only. Run chkdsk and mount in Windows.
Probably should've tried looking there before...