so you have the 3.13.6 kernel on both disks
The output of dmesg2 gives the the wdc25 was on device 0:3:00 and you say it was in slot 1 that is as it should and means the cables are connected correctly
single disk boot (I assume the disks are in slot 1)
as well wdc25 and 20 give fvdw-sl-15-3
double disk
wdc25 in slot 1 gives fvdw-15-1
wdc20 in slot 1 gives fvdw-15-3
I think the nas boots from the right disk, in both cases it loads the kernel from the disk in slot 1 but it seems to load the firmware from the wrong partition, the question is why. This can only be the case when the device nodes are wrong
it would be helpfull if you post for both situations the output of
- Code: Select all
cat /proc/partitions