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ReadyNAS Duo V2 does not complete boot, possible disk failure
ReadyNAS Duo was used as video server for AppleTV content suddenly disappeared from network. No power outages, or other harsh events correlated with timing of disappearence. Would not shut down using power button so unplugged, waited a couple minutes, replugged in and attempted a power-up. Unit boots but only see flashing power button, hear some strange disk noises that seem to repeat several times and then go quiet. Unit never finished booting and never shows up on network or in RAIDAR. I am assuming one or both disks have failed. I have a standby new disk. I am assuming I should try removing one of the disks while the unit is off but I cannot find any documentation on how to proceed. I don't have an exact backup but most of the files probably exist elsewhere --- should I try to backup first using the hardware "backup" button? Also, I had the email warnings setup but did not receive anything warning me of imminent disk failure. It could also be the chasis - how can I tell without RAIDAR?
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Have you tried using the Boot Menu option "Skip Volume Check" if it boots copy your data off as a backup and then try a factory default (which will wipe ALL data)
I have not tried that (or anything other than the reboot)....in the manual there is a warning about potential loss of data using this procedure. If only one drive has failed does performing this startup risk my data? My inclination was to remove one drive, but from what I am reading it sounds like removing and replacing drives in the Duo will automatically format them as new drives and then start mirroring the other drive. Also I cannot tell which drive has failed as Raidar will not detect the Duo. Just curious why the manual would state that drives are started under this procedure risk losing data. Alternatively this looks like it may be my only option on the table...
If you're sure that your NAS is running a RAID1 volume (default setting with two drives), then booting with one drive at a time is an option (clean shutdown, leave only one drive, boot, if doesn't work, clean shutdown, leave only the other drive, boot).
This implies minimal risk. If the NAS boots with only one drive and cannot read its partition table, it will consider it as blank and format it. The probability that both your drives are healthy but lost their partition table is very low.
You can also test each drive in a PC using the drive manufacturer testing/diagnosis tool. Unless you manually perform intrusive actions, this shouldn't modify the drives.
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