Data Recovery and Disk Utilities Forum @R-TT

I have a NetGear ReadyNAS Ultra 4 with 4 disks running X RAID 2. Disk 1 and 2 are 3TB WD Red. Disk 3 and 4 are WD 4TB Red. Total disk volym 9TB.

Volume is OK but the disks are 7 years old so I bought 4 new Seagate Barracuda 6TB disks to exchange the WD disks.

I changed disk 1 to a Seagate Barracuda 6TB. Disk was checked and passed by ReadyNAS. It started to reproduce itself onto the new disk. I checked in at 30%. Then 6 hours later it had stopped and the NAS reported that Disk 4 was dead. The volyme was still there (accordning to the NAS) buy I couldn't reach it from my computer.

I then replaced Disk 1 and inserted the original WD. Nothing happened so finally I rebooted the ReadyNAS and it didn't find any volumes at all...

So, now I have connected all 4 original WD disks to a PC with Windows 10, via SATA - USB 3 interfaces, and installed R-Studio. All 4 disks show up. Disk 4 that was "dead" in the ReadyNAS is "Suspect" (yellow) but it is working at the moment.

I know the order of the disks and that they are a X RAID 2 RAID. But, I can't figure out the settings in R-Studio so I can read the disks. I have tried creating a Virtual Block RAID and inserting the disks in correct order. Do you have a Custom RAID type I can create to this environment? I have tried the Auto function for Offset and RAID Layouts but with no luck.

What will happen if you connect the new disk instead of the old one?

I tried with and without Disk4 (which the ReadyNAS deemed dead) and with both the old Disk1 and the new Disk1 but the ReadyNAS always says "No volume". It finds the disks and displays them but there is no Volume.

If I connect all 4 disks to the PC, R-Studio finds them and displays them under "Virtual Volume sets and RAIDs".

Rogfitz wrote: ↑

Wed Apr 15, 2020 1:27 am

I tried with and without Disk4 (which the ReadyNAS deemed dead) and with both the old Disk1 and the new Disk1 but the ReadyNAS always says "No volume". It finds the disks and displays them but there is no Volume.

If I connect all 4 disks to the PC, R-Studio finds them and displays them under "Virtual Volume sets and RAIDs".

Can I see a screenshot of the Devices (right) pane with the "Virtual Volume sets and RAIDs" expanded?