October 18, 2025Oct 18 Hi, I just build my unraid, move from synology. Why my transfer speed from PC to external HDD (connect to Unraid using unassigned device) is slow (40-50MB/s) compare to Synology (transfer same file from PC to external HDD connect to synology) I got 105MB/s. Is there any setting to speed up the transfer? I also tried with rsync command transfer file between ext HDD to ext HDD, but not helping, got same speed (40-50MB/s)When I transfer from PC to Unraid array everthing is normal, I got 250MB/s
October 19, 2025Oct 19 Community Expert So the issue is only transferring to an unassigned disk? I assume not, but does it make any difference if you assign the disk to a pool? Also, post the diags during a transfer.
November 7, 2025Nov 7 Author Hi, sorry not reply for long time. I tried to copy to array also but speed always drop to 50Mb/s from 250Mb/s. Please check my diags during transfer.Thanks bro diagnostics-20251107-0957.zip
November 7, 2025Nov 7 Community Expert That graph suggests the device is unable to keep up with the write speeds, initially it was faster while it's being cached do t RAM, then it's limited by the device's actual write speed.
November 9, 2025Nov 9 Author Yeah but i use wd red plus, it supposes to be 200mb/s. When I transfer to synology I get 115Mb/s coz of limitations of 1gig ethernet.
November 10, 2025Nov 10 Community Expert 17 hours ago, c0nd0 said:Yeah but i use wd red plusDo you mean the 6TB WD? That's a WD60EDAZ and according to the internet, it's a WD Blue SMR.
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