July 10, 20232 yr Hello, i have an array of 5 hdds (Seagate IronWolf ST6000VN001 6 TB) and a nvme cache drive (Crucial P3 1TB). My motherboard is a MSI MPG Z490 Gaming Plus and an Intel CPU I5-11400. A network card with two 10 gbit ftp+ ports is used too (connected directly to my pc with an fibre cable). If i use the Blackmagic Disk Speed Test i get write speeds about 150MB/s and read speeds about 980 MB/s. Why are the write speeds so low? The network and the cache should be capable of more... Do you have any advice? Thank you a lot! livis-nas-diagnostics-20230710-2048.zip livis-nas-smart-20230710-2049.zip
July 10, 20232 yr Community Expert Nothing in syslog except you started a correcting parity check. Only an hour or so since reboot. Did you actually attempt to write to a cached share (which?) since that reboot?
July 10, 20232 yr Author I've done some writes a couple days ago. Today i've only tried some benchmark test with the blackmagic disk speed test (150 mb/s write and 980 mb/s read). After you replied to my post, i tried some real transfers and got much higher transfer speeds (about 500 mb/s write). Is this a normal difference between bm disk speed test and real transfer rates? I've updated the logs. livis-nas-diagnostics-20230710-2155.zip
July 11, 20232 yr Community Expert Solution Synthetic benchmarks results are not always reliable, I'd worry more about actual file transfer results, 500-600MB/s looks reasonable, likely would be a little faster transferring to a disk share (or exclusive share).
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