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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...
RN104 is pretty weak (it doesn't even handle gigabit ethernet speed while copying...), so any kind of checksum, virus scan, scrub, rebuild, etc. will surely decrease the perf.
When you go to system/volumes/clic on the space graph/settings you have an option called checksum. Not sure about what it's actually doing, and I'm pretty sure performance will decrease (not sure how much though) but if your NAS is still in test mode (means you have a duplicate of all data in it and time to restore everything of needed) you can give it a try and factory default if needed.
I don't really see what you are willing to do there. The BTRFS raid 1 options sounds close (not identical though) to raid 10 which I think is supported by RN104 and if you want a full redondant thing, why not going the raid1 with 4 disks ? As for the checksum, I believe that's the rebuild role to do that when a new disk is inserted. I see no other purpose than detect incoherences for the rebuilding process, it won't surely take 2 days to add a disk to a raid without any kind of verification.
and isn't that the raid job to make sure everything is well copied ? I believe after a copy there is a read to check that or at least an "ack", am I wrong ?
So can you be more specific as to why you want this ? it would be a better way to help you find an alternative I think.
When you go to system/volumes/clic on the space graph/settings you have an option called checksum. Not sure about what it's actually doing, and I'm pretty sure performance will decrease (not sure how much though) but if your NAS is still in test mode (means you have a duplicate of all data in it and time to restore everything of needed) you can give it a try and factory default if needed.
I don't really see what you are willing to do there. The BTRFS raid 1 options sounds close (not identical though) to raid 10 which I think is supported by RN104 and if you want a full redondant thing, why not going the raid1 with 4 disks ? As for the checksum, I believe that's the rebuild role to do that when a new disk is inserted. I see no other purpose than detect incoherences for the rebuilding process, it won't surely take 2 days to add a disk to a raid without any kind of verification.
and isn't that the raid job to make sure everything is well copied ? I believe after a copy there is a read to check that or at least an "ack", am I wrong ?
So can you be more specific as to why you want this ? it would be a better way to help you find an alternative I think.
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