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Forum Discussion
ReadyNAS Duo: Bad disks detected
My parents' NAS stopped responding over the HTTP admin interface, wasn't showing on the router as being currently connected and wouldn't shut-down by holding the power button in. A couple of days previous it was shut-down improperly (by my toddler nephew who managed to turn off the UPS!). Upon switching on again, it wouldn't start up properly (power light was flashing and fan was racing) so I got them to try a firmware reinstall using the reset button (pressed for around 10 seconds during power on).
Following a long time of pulsing power light, when I connect to their PC I can now see the NAS on Raidar but cant see it via the HTTP admin interface. It is also showing on the router as having an IP address. In Raidar the first icon (which does this represent?!) has no coloured blob under it, the disks icon has a green and a yellow coloured blob under it, the battery item has no coloured blob (despite being connected to a UPS) and the fan icon has a green blob under it. Under the information icon is the message "Bad disks detected". The NAS has two Seagate 2TB ST2000DM001 (i.e. supported hardware) drives installed.
Can you suggest what may have happened and how I proceed?
Many thanks!
Geoff
Following a long time of pulsing power light, when I connect to their PC I can now see the NAS on Raidar but cant see it via the HTTP admin interface. It is also showing on the router as having an IP address. In Raidar the first icon (which does this represent?!) has no coloured blob under it, the disks icon has a green and a yellow coloured blob under it, the battery item has no coloured blob (despite being connected to a UPS) and the fan icon has a green blob under it. Under the information icon is the message "Bad disks detected". The NAS has two Seagate 2TB ST2000DM001 (i.e. supported hardware) drives installed.
Can you suggest what may have happened and how I proceed?
Many thanks!
Geoff
3 Replies
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- Try installing linux reader on a Windows PC, and connecting disk 1 of the NAS via a USB adapter or SATA. If the data partition is intact, you might be able to recover the data. If there is no data, then repeat with disk 2 (depending on the history, disk 2 could possibly be the parity disk). Linux reader can be found here: http://www.diskinternals.com/linux-reader/
Also it is worth checking the disks in a PC using seatools.
BTW, power down the NAS before removing the disks.
As far as what happened goes - it sounds like the unexpected shutdown corrupted the OS file system at least. RAID is not guaranteed to protect against that. I lost my data volume once in my duo when I accidentally pulled the plug. (I had backups so no real harm was done). - Hi,
thanks for that. Does the combination of yellow and green blobs in the disk column not imply that one disk is OK? This is all complicated by the NAS being with my parents in another location....
Thanks,
Geoff - It is possible that one disk might be ok. They could power down the NAS, and try removing the disk with the yellow blob, and then restart.
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