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Forum Discussion
Checksum capabilities with btrfs on top of mdraid?
As I understand, readynas OS6 implements btrfs on top of an mdraid volume because native raid-support in btrfs is still a bit experimental (introduced 2013). How does this affect the checksum capabili...
I've been poking around my own RN104 ...
It might be possible to get Checksum-autohealing with ReadOS6 without loosing too much.
Readnas creates raid devices for every hard disk. If you put in multiple hard disks, and select "expand volume", it will create one md device (raid0 or raid1 depending on several facts i've not clarified yet) per hard disk
over all those devices it creates ONE btrfs filesystem (by using btrfs device add or something similar).
When logging in to ssh and using "btrfs balance -mconvert=raid1 -dconvert=raid1 /data" you can convert the volume to raid-1.
Raid-1 in btrfs interpretation is: Every chunk of data is to be written to two different devices to be redudantly available. So raid-1 in btrfs will be able to use 4 disks of say 2TB each, and will have 4TB available.
BTRFS and its raid-implementation is highly experemential, so if you want to try this out (I'm in progress of doing so, still copying my 5TB of data from my two old, slow NAS to the RN104...) - do it at your own risk.
I won't take any guarantees, and netgear won't , i'm sure.
It might be possible to get Checksum-autohealing with ReadOS6 without loosing too much.
Readnas creates raid devices for every hard disk. If you put in multiple hard disks, and select "expand volume", it will create one md device (raid0 or raid1 depending on several facts i've not clarified yet) per hard disk
over all those devices it creates ONE btrfs filesystem (by using btrfs device add or something similar).
When logging in to ssh and using "btrfs balance -mconvert=raid1 -dconvert=raid1 /data" you can convert the volume to raid-1.
Raid-1 in btrfs interpretation is: Every chunk of data is to be written to two different devices to be redudantly available. So raid-1 in btrfs will be able to use 4 disks of say 2TB each, and will have 4TB available.
BTRFS and its raid-implementation is highly experemential, so if you want to try this out (I'm in progress of doing so, still copying my 5TB of data from my two old, slow NAS to the RN104...) - do it at your own risk.
I won't take any guarantees, and netgear won't , i'm sure.
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