On 2013/12/21, at 11:39 AM, Macs R We wrote:

> She had established her iPhoto library on an external drive, and something 
> she did or some way she disconnected the drive ended up with iPhoto 
> establishing a new iPhoto library off /Volumes but resident on her root disk, 
> that was only visible when her external drive was disconnected. This should 
> never have happened, and I'm not even sure how the operating system allowed 
> it.

You know what this reminds me of? When I played around with union mounts, and 
discovered that any unix application would see the union mount just fine, while 
anything based around appkit would see either one side, or the other side, but 
never both.

Apparently, there are two different sets of low-level file access routines, and 
the posix calls are NOT the real "raw OS interface" -- there's a hidden OS with 
a bunch of different calls underneath, and that OS doesn't know about union 
mounts.

---
Entertaining minecraft videos
http://YouTube.com/keybounce

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