RAID Parameters - ZAR/UFS Recovery

[niklw]

I am currently working on recovering a data set from a PR4100 using UFS and ZAR, but I wanted to be sure I had the RAID parameters correct. Setup is standard 24TB PR4100 in RAID5 – 4x6TB WD RED.

Looking to confirm:
RAID offset
RAID level (configuration and redundancy type)
The stripe size (if applicable)
Layout configuration (Left symmetric?)

I believe I have the RAID order correct.

Has anybody here had any luck restoring accidentally deleted data via ZAR/UFS?

[Tfl]

I’d recommend to spin up a linux distro (e.g. Ubuntu live ISO if you don’t want to install anything) and use mdadm…
But I looked up ZAR and it should be able to detect the following:

• each disk has a GPT partition table
• each second partition is a member of a RAID5 array (you had 18TB available, right?)
• the file system on the array is ext4

Here’s the steps I used:

Things you want to know about the EX2 but nobody had the answers... until now

WARNING: use this at your own responsibility and risk! How to recover your data from WD My Cloud device drives Get a PC running Ubuntu (or any unix you like) or another NAS (WD, QNAP, synology, … doesn’t matter, just ensure it doesn’t auto wipe the drive) with a free slot. A USB SATA 2.5"/3.5" SSD/HDD Docking Station would work as well. Some commands may require sudo. List all drives to know the old status lsblk -d Insert the data drive in a free slot of the NAS / HDD docking station. For…

[niklw]

Solved using R-Studio. This software perfectly detected and rebuilt the RAID, and successfully recovered nearly 100% of the missing data.