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Forum Discussion
perkij
Oct 21, 2013Aspirant
Readynas 104 drops out when copying to it
I have a readynas 104 configured with four 4tb drives in raid 5. I've managed to copy about 6tb onto the device without issue but now whenever I go to copy something onto the box, lets say a single 4...
xeltros
Dec 27, 2013Apprentice
I guess you can save the data by doing some nasty commands but this will require time with no success warranty.
Netgear changed the BTRFS filesystem metadata size (node and leaf size) to solve the problem. The only way to set them is by sending a format command (mkfs.btrfs), that's why they ask for a reset, simple, safe, fast and effective way to do so.
I believe you can do it yourself.
=> Since BTRFS can be resized easily, you can shrink your BTRFS volume
=> create a new one with the good node/leaf size
=> then transfer data from the old to the new volume (shrink again if necessary)
=> delete old volume (except if you have enough space to keep the old and the new copy of your files in the NAS, that way you would have a backup copy in the eventuality of a problem with the new partition after reboot).
=> update fstab
=> reboot to check
In theory this should work but I have never tried, I believe nobody has in the forum. If it works you save your data but I don't think Netgear will like to support your NAS if they discover you've done this somehow. If it doesn't work you may need a factory reset (even though you don't touch the / so it should reboot anyway with or without the data).
If you have a backup (and you really should), I really advise to do it the Netgear Way, you will need time to copy but it's cleaner and supported by Netgear. If you don't have a backup copy, I advise to get one. If you can't get one then you can try this but that's tricky and any error can cause data loss. Last option is to stay in your NAS current state.
Netgear changed the BTRFS filesystem metadata size (node and leaf size) to solve the problem. The only way to set them is by sending a format command (mkfs.btrfs), that's why they ask for a reset, simple, safe, fast and effective way to do so.
I believe you can do it yourself.
=> Since BTRFS can be resized easily, you can shrink your BTRFS volume
=> create a new one with the good node/leaf size
=> then transfer data from the old to the new volume (shrink again if necessary)
=> delete old volume (except if you have enough space to keep the old and the new copy of your files in the NAS, that way you would have a backup copy in the eventuality of a problem with the new partition after reboot).
=> update fstab
=> reboot to check
In theory this should work but I have never tried, I believe nobody has in the forum. If it works you save your data but I don't think Netgear will like to support your NAS if they discover you've done this somehow. If it doesn't work you may need a factory reset (even though you don't touch the / so it should reboot anyway with or without the data).
If you have a backup (and you really should), I really advise to do it the Netgear Way, you will need time to copy but it's cleaner and supported by Netgear. If you don't have a backup copy, I advise to get one. If you can't get one then you can try this but that's tricky and any error can cause data loss. Last option is to stay in your NAS current state.
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