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ReadyNAS 716X "Data Dead" after resync and replacement Seagate 4TB disk not being recognized
I have a ReadyNAS 716X running OS 6.10.3
About a month ago, I got a “Data Degraded” error and logs indicated Disk 4 had failed. I replaced Disk 4 with a new Seagate 4TB ST4000NM0033 and the RAID started to resync. After several hours, I noticed the resync progress had reached 99%. However, when it finished, instead of my volumes, I got the error message “Data DEAD” with no volumes visible and an error in the logs showing that Disk 6 may have failed. I contacted Netgear support and Level 2 support reviewed the logs and said they needed to bring in Level 3 support. I booted the NAS into Debug mode.
Then 30 days passed waiting for Level 3 support. [I know we're in the middle of a global pandemic and everything is delayed but, whew, that's a long time...]
When Level 3 finally responded (at 4:30am my time), it happened to be the one night that the NAS for some reason rebooted overnight and was no longer in Debug mode when they tried to connect. Ugh! So when Level 3 couldn’t connect, they passed me back to Level 2.
The new Level 2 tech reviewed the logs and said that, as suspected, I need to replace Disk 6. I had ordered another replacement disk, but a HP branded disk arrived that had both a HP model number and ST4000NM0033, and was running HPGC firmware (not SN03 or SN04 like my other disks). When I rebooted the NAS with this new HP disk it appeared Black in the diagram on the Volumes page in the admin interface and listed:
Volume Host ID: 00000000
Disk State: UKNOWN
All the other disks appear Red with Disk State: ONLINE and unique Volume Host IDs.
Level 2 suggested I get a true Seagate disk with original firmware, so I ordered yet another replacement disk. This time I got an actual Seagate ST4000NM0033 running SN04 firmware. However, when I replaced the HP disk and rebooted with this new Seagate disk, I get the same result as I did with the HP disk. Still doesn’t seem to be recognizing Disk 6 (although it is reading the disk model and serial # so I don’t think it’s a hardware problem plugging into the disk bay).
I’m trying to get back to RAID resync but can’t seem to get the NAS to recognize any new disk 6.
Anyone else run into this scenario and have any advice on how to solve?
And if anyone from Level 3 support is monitoring this, please reach out!
1 Reply
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The HP branded drive should have worked fine unless it also used 520 byte sectors (which I am not aware any HP product uses). It likely had some HP formatting already and just needed to be formatted or possibly zeroed on a PC. Netgear support certainly should have known that. Yeah, it's not on the compatibility list per se, but it doesn't seem like they even tried.
As far as recovering the data, you are best off with Netgear support when a second drive fails. If it's still healthy enough to clone to another drive, there may be some hope for solutions like ReclaiMe, but it's also expensive and you need a way to connect all the drives to a PC
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