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Forum Discussion
ReadyNAS NV+ v2 'no disk detected' after upgrade [SOLVED]
Having owned and loved a Duo v1 for many years I bought a pre-owned NV+ v2 without disks. I installed one of my ST3500418AS (500GB on HCL of both Duo and NV+ v2) in the NV+ and did a factory default...
So it was time to break out the screwdrivers.
VERY nicely made unit. Quite easy to take apart.
I unplugged an plugged the sata backplane several times to make sure it wasn't a connection issue there. It wasn't.
As there had not been any disk sounds for quite a while I guessed there might be a sata power supply problem so I
was thinking of running a disk, out of the chassis with external sata power but sata data connected to the NV+.
Before doing that (I have to purchase the kit) I decided to (carefully) test the voltages on the (all) empty sata power connectors.
No power! (3.3v, 5v, or 12v). Thinking about sourcing a replacement sata backplane.
Another hour staring at the sata backplane and checking continuity with a multimeter.
It seemed to me that both 12v and 5v should be coming from the main board via the smaller of the two connectors;
the 12v via the middle pins on the capacitor side and the 5v the middle pins on the sata connector side.
The 12v fed to u3, u4, u7, u8 for (conditioning?) on the way to the sata; with 4 independent circuits, now thinking sata
backplane is not the problem.
Carefully test the voltage at u3, u4, u7, u8 with one disk fitted; less than 9v.
Can't see an obvious place on the main board to test voltage so was about to write off the unit (main board too expensive, right?)
Last minute hunch, test the voltage from the psu as it enters the main board; less than 9v.
Seems like the psu is the culprit; verified my multimeter on a 12v car battery; no smells from it though.
What do people think? Am I on the right track or deluding myself.
Can anybody recommend a source for a replacement psu?
Cheers,
Aidan
VERY nicely made unit. Quite easy to take apart.
I unplugged an plugged the sata backplane several times to make sure it wasn't a connection issue there. It wasn't.
As there had not been any disk sounds for quite a while I guessed there might be a sata power supply problem so I
was thinking of running a disk, out of the chassis with external sata power but sata data connected to the NV+.
Before doing that (I have to purchase the kit) I decided to (carefully) test the voltages on the (all) empty sata power connectors.
No power! (3.3v, 5v, or 12v). Thinking about sourcing a replacement sata backplane.
Another hour staring at the sata backplane and checking continuity with a multimeter.
It seemed to me that both 12v and 5v should be coming from the main board via the smaller of the two connectors;
the 12v via the middle pins on the capacitor side and the 5v the middle pins on the sata connector side.
The 12v fed to u3, u4, u7, u8 for (conditioning?) on the way to the sata; with 4 independent circuits, now thinking sata
backplane is not the problem.
Carefully test the voltage at u3, u4, u7, u8 with one disk fitted; less than 9v.
Can't see an obvious place on the main board to test voltage so was about to write off the unit (main board too expensive, right?)
Last minute hunch, test the voltage from the psu as it enters the main board; less than 9v.
Seems like the psu is the culprit; verified my multimeter on a 12v car battery; no smells from it though.
What do people think? Am I on the right track or deluding myself.
Can anybody recommend a source for a replacement psu?
Cheers,
Aidan
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