Aviv Posted November 3, 2019 Share Posted November 3, 2019 Hi! Im getting about 55mbs when using SSD as a cache when transferring from my linux machine to unraid. Writing directly to the ssd using "unassigned plugin" yield about 70-80mbs only. both computers are connected with 1gb connection. The unraid build is old hardware: I5-650 cpu, 8gb ddr3 ram. IronWolf pro 4tb X 2 + 1 Sandisk 250gb ssd. Any tips regarding how to debug it? (im new!) Quote Link to comment
trurl Posted November 3, 2019 Share Posted November 3, 2019 Go to Tools - Diagnostics and attach the complete diagnostics zip file to your NEXT post. Quote Link to comment
Aviv Posted November 3, 2019 Author Share Posted November 3, 2019 35 minutes ago, trurl said: Go to Tools - Diagnostics and attach the complete diagnostics zip file to your NEXT post. How do I hide the encryption key from the diagnostics report? Quote Link to comment
trurl Posted November 3, 2019 Share Posted November 3, 2019 10 minutes ago, Aviv said: How do I hide the encryption key from the diagnostics report? I've never heard of the encryption key appearing in the diagnostics. Are you sure it's there? Quote Link to comment
JonathanM Posted November 3, 2019 Share Posted November 3, 2019 And also, does the speed improve if you are not using encryption? Quote Link to comment
bonienl Posted November 3, 2019 Share Posted November 3, 2019 1 hour ago, Aviv said: How do I hide the encryption key from the diagnostics report? The encryption key is NEVER part of diagnostics Quote Link to comment
Aviv Posted November 4, 2019 Author Share Posted November 4, 2019 (edited) I believe i got it all wrong.. The transfer speed show from my linux machine is in MiB's, eg I believe that 56MiB's is about 400Mbps. so, my bad. all good. right? Edited November 4, 2019 by Aviv Quote Link to comment
itimpi Posted November 4, 2019 Share Posted November 4, 2019 31 minutes ago, Aviv said: I believe i got it all wrong.. The transfer speed show from my linux machine is in Mib's, eg I believe that 56Mib's is about 400Mbps. so, my bad. all good. right? Normally when quoting speeds it is conventional to use a capital 'B' when you mean bytes and a lower case 'b' when you mean bits. That helps with deciding what units one is talking about. Quote Link to comment
Aviv Posted November 4, 2019 Author Share Posted November 4, 2019 Sorry, im new at this:) Updated my post. im getting 56MIB/s. I think its ok. as this is the speed of a sata ssd. Quote Link to comment
itimpi Posted November 4, 2019 Share Posted November 4, 2019 8 minutes ago, Aviv said: I think its ok. as this is the speed of a sata ssd. That sounds very slow for a SSD. I would expect it to be more like 560 MB/s. Quote Link to comment
Aviv Posted November 4, 2019 Author Share Posted November 4, 2019 56MiB/s is about 469.8 Mbps. my ssd model supports Sequential Write (up to) 350MB/s (SanDisk_SSD_PLUS_240GB). So i think im good. but still not sure i get the numbers right. Quote Link to comment
testdasi Posted November 4, 2019 Share Posted November 4, 2019 2 hours ago, Aviv said: 56MiB/s is about 469.8 Mbps. my ssd model supports Sequential Write (up to) 350MB/s (SanDisk_SSD_PLUS_240GB). So i think im good. but still not sure i get the numbers right. In case you are still confused about the unit. MB/s = megabyte/s = 1 million bytes/s MiB/s = Mebibyte/s = 1,048,576 bytes/s 56MiB/s can be a reasonable speed if your data is not too sequential in nature. It would be certainly too slow if you data is highly sequential e.g. a large ISO image. So it depends. Note though that since you are transferring over gigabit network, your max speed will be limited to 1Gb/s = 125MB/s (8 bits = 1 byte). So you will never get anywhere close to 350MB/s sequential unless there are multiple simultaneous independently connected clients. Quote Link to comment
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