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Forum Discussion
RN104 file transfer speeds
Hello,
I've always had my rn104 connected to a gigbit ethernet switch and I get 10 - 12MB/s file transfer speeds to my windows 11 pc. I set static IP addresses on my nas and pc, ran a short(6ft) cable directly between the 2 and I'm only getting 15 - 16MB/s. I expected much more. Any Ideas as to why so slow? The RN104 has old 5400 rpm desktop 4TB hard drives. Could they slow transfers down that much?
Thanks for any assistance rendered,
Tom
2 Replies
How many drives? In its raid configuration? (Certain raid configurations slow transfer as they're doing data duplication)
What configuration?
Might check this review: https://www.smallnetbuilder.com/nas/nas-reviews/netgear-readynas-rn104-reviewed/
Keep in mind, they're testing with a 5400rpm drive but its a NAS rated and newer. Rated for quite fast read/write speeds. Not sure what your specific drive is rated for
The RN104 has old 5400 rpm desktop 4TB hard drives.
What model? Many desktop drives are now SMR, and they will slow down the speeds after sustained writes.
How full is the data volume?
What firmware are you running?
Are you testing speeds while copying a single large file? Or are you copying a lot of smaller files?
Are you able to test this with a different PC?
One possible cause is a failing disk. So I recommend downloading the full log zip and looking for disk or BTRFS errors. dmesg.log and systemd-journal.log are both good places to look for these,
Certain raid configurations slow transfer as they're doing data duplication
RAID-1 and RAID-10 are the only modes with redundancy that duplicate (mirror), and since the writes are done in parallel they don't actually slow anything down. You can see that in the link you posted - RAID-1 and RAID-10 write performance is faster than RAID-5. (Also, the minimum disk I/O for RAID-5 is the same as mirroring, since the parity block for the stripe also needs to be written every time a data block is written).
In any event, the measured speeds are too slow to be explained by the choice of RAID mode.
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