Mac users will probably be familiar with their PRS-T1 (and later?) devices mounting two disks when they're connected over USB in data transfer mode - the READER disk containing the ebooks and things, and the SETTING disk containing an installer for the Reader app.
I've recently switched to using calibre, and was getting irritated that its "device eject" feature for the PRS-T1 didn't eject the SETTING disk. If you disconnect the USB cable at this point, the Mac complains that a disk was still attached and could now be damaged.
So here's how to fix that! Or rather, here's how to stop the SETTING disk from getting mounted automatically, which gives the same end result.
You need to use the command-line for this. This works on Mountain Lion (10.8) and should work for earlier releases of OS X.
- Type "sudo nano /etc/fstab" and return to create if necessary and edit a system file
- You will be prompted for your password - enter it and press return
- A "GNU nano" screen will appear in the terminal window.
- Type (without the quotes) "LABEL=SETTING none msdos noauto,ro" and return
- Type Control-X, then Y when asked to save the file, then return to accept the default filename.
That's it - the next time you attach your PRS-T1 in data transfer mode, only the READER disk will appear.
I hope this is useful for someone else.
Chris