February 10Feb 10 Hi all, I'm new here and struggling a bit. I'm fairly technical but Unraid, docker, VM's have been a steep learning curve. I've built a server from old PC parts to learn and experiment. Array is 3 HDD's, cache is two SDD's. I'm trying to copy 300GB of old Windows laptop files to a folder on my Array which is shared as an SMB. Nothing complex, just copy / paste from Windows into the Network folder. File transfers start at a few MB/sec then slow to a few kB/sec. One laptop has been running overnight and has barely made 20% progress. On the Main tab the array occasionally shows file writes of 50kbps but most of the time its at 0 even while the laptop is transferring files. CPU usage is at about 70% during the transfer even though there isnt much disk actvity. Ive had the same behaviour on two different laptops on different days, one was running Win7, the other Win10. The laptops were connected via ethernet and there doesnt appear to be any LAN bottlenecks. I can't work out what is going on or even how to diagnose it so i'm here looking for some help. I've tried looking at other posts about similar problems but havent been able to find anything that matches my issue. many thanks in advance ! pheonix-diagnostics-20260210-1345.zip
February 10Feb 10 Community Expert Two things stand out. None of your shares are using cache when writing to the array. Using an SSD as cache for a share will speed up moving only 300GB of data as your cache should have upwards of 1TB free.Second thing. If you are not (or can not) use a cache for the array, turn on reconstruct write as shown below:It will speed up writes made directly to the array substantially.Another item, it is not completely clear how many laptops are accessing the server simultaneously. Another item is that software that LimeTech uses for saving to shares has a lot of overhead. This situation is really evident when copying large numbers of small -size files. Copying from two different computers adds to this problem by increasing the amount of disk thrashing as data storage, files tables and parity are being updated.
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