October 30, 20214 yr HI , I'm a new user of UNRAID, I'm migrating my existing disk to my new custom NAS and I have an issue with the cache drive. My actual situation is: 2 hdd in a new array without parity 1 cache nvme device 1 unassigned disk (will be my parity disk after the migration of the files) When I rsync my big files from the unassigned disk to my array, the read/write speed is about 130-160MB/s. When I move my files (with mover) from the cache to the array the read/write speed is about 130-160MB/s. When I copy a big file from network to my cache the write speed of my cache is about 130-160MB/s BUT when I rsync my file from my unassigned disk to the cache, after 20-30 secs at 130-160MB/s, my read/write speed decrease at about 30-40MB/s (????????) WHY??? What could be the problem? (I disabled already folder caching plugin) Thanks
October 30, 20214 yr Community Expert According to syslog you filled cache. Were you writing to a cached user share or directly to cache?
October 30, 20214 yr Author Yes, I know. Right now I'm coping on array. But when the cache is available (free), the write speed rate is really low (40MB/s). When the cache is full, automatically start to write on array, and the speed increment up to 130-160MB/s
October 30, 20214 yr Community Expert What user share were you writing to? When you don't specify units for Minimum Free, such as MB or GB, the default is KB. So 70000000 is 70000000KB, or 70GB. Not unreasonable, but is that what you intend? Each pool (cache) has a Minimum setting also, you haven't set that.
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