Yosemite: no Frontview and CFIS mount

Do you have a backup?

Have you tried rebooting your NAS and your Macs?

unfortunately, no.

This problem started after I performed backup of some files to an external USB drive.
I did perform a OS reinstall to try to recover. But its still the same.
RAIDar showed all green. Nothing wrong.

With LAN connection I managed to:
With Safari, my Frontview showed "null".
With Firefox, my Frontview loads but super slowly.
CIFS cannot load properly in Finder.

Rebooting both NAS and MAC doesn't help.

I've sent the logs for your reference.

Your logs indicate a possible problem with the RAM. Have you moved the NAS recently?

Nope.
But I cannot rule out accidentally.

What do you suggest?

Sounds like the RAM has failed. You will need to replace the RAM (not supported - be sure to run the memory test at least a few times before trusting it) or

purchase a new ReadyNAS e.g. RN312 and contact support. Wait for advice from support. Don't put the disks into the new NAS until prompted to by support. Note there may be a charge for this.

I'm puzzled that I'm still able run my Logitech media server .

I tried to perform memory diagnostics tests by holding the power button for the fifth blink.
But it doesn't seem right.
disk 1 on. Disk 2 off.
then disk 1 off, disk 2 on.
then disk 1 and 2 on.
hang there .

What's the expected sequence of events?

Once booted into the memory test boot menu option, the patterns you should see are here: http://www.readynas.com/forum/viewtopic.php?f=11&t=26993

The test hanging confirms there is a memory problem.

when I meant "hang" was that the NAS didn't reboot and the LEDS stayed there. No logs can be seen to know if the mem tests was carried out or status.
So what I observed was that the activity LED, Disk 1 and Disk 2 was on.
I interpreted as RAM test passed.

I retrieved a latest mem_info.log

MemTotal:       226352 kB
MemFree:          3440 kB
Buffers:          8656 kB
Cached:         108176 kB
SwapCached:          0 kB
Active:         175984 kB
Inactive:        49104 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       226352 kB
LowFree:          3440 kB
SwapTotal:      255968 kB
SwapFree:       255648 kB
Dirty:               0 kB
Writeback:           0 kB
Mapped:         131696 kB
Slab:             8432 kB
CommitLimit:    391776 kB
Committed_AS:   223664 kB
PageTables:          0 kB
VmallocTotal:   131008 kB
VmallocUsed:      1136 kB
VmallocChunk:   129408 kB

diagnostics.log indicates this:

Memory ------------------------------- * Found errors on your system that are generally caused by bad memory. Please contact support about this issue.

Your disk smart logs also indicate that there is a problem with your WD disk.

Thanks.
I tried to run the ram tests twice last nite.
On both occasions, results was the same.
3 leds was on steady. ACT, disk1, disk2.
Power led was blinking.

I'm puzzled by the logs and this Mem test Results.