I was wondering why I kept getting crackles and pops when watching videos, and I just tested my unit with AJA System Test.
I have set “Disk Drive Spin Down” to never, the unit is powered 24/24 7/7 and have this issue with iSCSI, FW800 or USB2.
Regardless of connection used, I always get huge peaks and canyons from 70 to 90 mb/s (depending of connection) to < 5 mb/s. The simple 3.5" HD inside the iMac (late 2009, a state of the art Mac under 10.6.3) I’m currently using is a model of stability by comparison.
WTF? not exactly what I was expecting from a $1500 storage device.
Added some pics outlining the problem (currently connected through FW800).