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ReadyNAS 102: how to recover data from RAID-1 disks?
How do I recover the data from the 2 RAID-1 disks that used to be a ReadyNAS 102 (FW 6.5.0)? I have SATA-to-USB cradle/cable and run a Windows 10 PC. Basically, after the upgrade to FW 6.5.0, ...
kblam wrote:
I've powered it down, and re-inserted the two disks, and powered it back up (I've done this before several time, actually), and RAIDar still sees the unit but indicates 'No disks detected.'
Sometimes I've found that actually disconnecting the system from power can help with bios device detection, so I thought it worth a try. Most modern electronics are never really off as long as they are powered. But it looks like the system is locking up after the boot. It could be the chassis hardware, something wrong with one of the disks that eventually crashes the SATA bus (or drivers), or something really wrong with the 6.5 upgrade.
You can also test the drives in a windows PC (perhaps with a USB adapter), with the vendor tools - seatools for seagate, and lifeguard for western digital.
kblam wrote:
Question on the customer support: if I go all the way to a data recovery contract, if I expect that my disks are in perfectly good shape, would the data recovery services produce an image of my disks on a third disk with my file structure and file names fully intact? Or would the recovery be just a dump of all the files w/o any file structure and files named by some some arbitrary recovery sequence? I have some 20k files on these two 4-TB drives, so such a dump of a recovery would be rather useless.
There are several scenarios here. Tracing one path...
If the chassis has failed (possibility but not a given) then you first would get a replacement RN102 under warranty.
At that point you reinsert the original disks and power up. Perhaps the system boots, and the original lockup still occurs.
Then you use support again to resolve the lockup problem. Perhaps at that point all your data is intact and mounted, but if the volume were corrupted, you would need a separate data recovery contract.
Netgear's data recovery team works remotely, and you would be able to discuss with support the odds of success and what they could provide before you execute that contract.
Make sure you do select OS Reinstall and NOT Factory Default! Read the documentation of the Boot Menu carefully.
StephenB JennC: I've re-inserted by two disks back into the RN102, selected 'Reinstall OS' from the boot menu (being very careful to select Reinstall OS and not default reset), waited 3.5 hours, and power button never stop stopped blinking. Double pressing power didn't shut it down, so I unplugged the AC adapter to power it down. I plugged it back in, and it entered the boot up sequence. RAIDar is able to see that it's in boot up, and then RAIDar says no disks are detected, and it's been this way for 3 hours now.
What now?
As far as I can tell both disks should still be good and not corrupted, because before I originally pulled the disks out, I was able to read the volume from Windows Explorer for a minute or two before the RN102 crashed (see original problem up top).
Have you looked at the status with RAIDar?
Also, you could try booting the RN102 in read-only mode (also described in the hardware manual).
StephenB: Dear Stephen, RAIDar detects the RN102 (it identifies model name, serial number, FW 6.5.0, etc), but indicates no disks detected.
Try powering down the NAS, and removing the power connection. Wait a few minutes and then reseat the two disk trays. Then restart and try again with RAIDar. If the NAS still doesn't see the disks, then contact support.
You can recover the data using a linux boot on the PC - there is some information on that here: https://community.netgear.com/t5/ReadyNAS-in-Business/OS6-Data-Recovery-How-to-Mount-BTRFS-Volumes/m-p/895576#M2184
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