July 7, 20251 yr I'm currently trying to move data off unraid array as fast as I can, so I've removed the parity disk which I thought was the bottleneck in the read speeds.in the array on disk1 I copy contents from it to computer 1 at 70MB/s, then on disk2 I copy contents at the same time to computer 2 then the now have both 35MB/s. I bypass fuse and access the disk directly when doing these transfers.Why did disk1 and disk2 transfer speed half in this case? Is there something hidden underneath in the unraid array where it doesn't like or work well with multiple disks being worked on at the same time?
July 8, 20251 yr Community Expert Parity does not affect read speeds, I assume both computers are using the same NIC for traffic, if so, that would likely be the bottleneck.
July 8, 20251 yr Author 18 minutes ago, JorgeB said:Parity does not affect read speeds, I assume both computers are using the same NIC for traffic, if so, that would likely be the bottleneck.my unraid and both computers are on a intel X510 10G NICs though
July 8, 20251 yr Community Expert I can easily read multiple disks from the array at >400MB/s, you will need to try and find the bottlenceck, run iperf to confirm the LAN is working OK, could also be a controller bottleneck.
July 8, 20251 yr Author 10 hours ago, JorgeB said:I can easily read multiple disks from the array at >400MB/s, you will need to try and find the bottlenceck, run iperf to confirm the LAN is working OK, could also be a controller bottleneck. running iperf I get over 3+ gigs a second, but yeah could be the controller though I'm running on modern motherboard and from a NetApp 24 bay
July 9, 2025Jul 9 Author 5 hours ago, JorgeB said:You can run the diskspeed container to benchamrk the controllers.yeah I'll give this a try, though I'm running my HDDs from a netapp disk shelf connected to a HBA in the NAS.I booted up a unraid ubuntu VM with mdadm raid5 with some of my disks and it ran 180MB+ on all the disk in the raid array fine.Maybe its because I used btrfs on my unraid array disks with compression enabled could be the reason
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.