I originally posted the following on the Phase One forums.
I almost pulled all my hair because of this issue, so I thought the solution could be helpful for others (especially FreeNAS users).
I recently moved to storing all my RAW files on a central server in the studio to be able to access them from my Macs as well as a Windows notebook (which I use on the field during trips). The server is a beefy machine, with dual gigabit Ethernet connections and an 8 disk super fast ZFS array. It runs FreeBSD 9.0 with Netatalk 2.2.1 for file sharing towards Mac clients and Samba 3.6.3 for Windows file sharing. It could serve files faster than the local SSD disk in my Mac… Basically this is the same software stack you get when you use FreeNAS.
From Windows 7 running the 64-bit version of C1 everything was fine, but when I worked on my files from a Mac then C1 crashed every 5-15 minutes bringing down even the Mac (I had to pull the plug several times because even shutdown didn’t work). Frankly I was unable to work at all with C1 from Macs (running OS X 10.7.3).
The server’s log was full with the following error message:
afpd: sys_getextattr_size: error: Result too large
After hours of debugging the solution is really simple: you have to add the “ea:ad” parameter to the shared volume’s config line in AppleVolumes.default.
The line for my Photos share is the following:
/tank/Photos ea:ad options:upriv dperm:0700 fperm:0600
No more error messages, and C1 6.3.5 shines! I’m a happy user now