s1oz Posted October 29, 2021 Share Posted October 29, 2021 sorry my English is not good.. Create a new cache pool and use raid0 mode Why is there only 80% free space? Quote Link to comment
JorgeB Posted October 29, 2021 Share Posted October 29, 2021 Becuase the devices are of different sizes, so the largest one can't be fully used, single mode will use both (but will be slower). Quote Link to comment
s1oz Posted October 29, 2021 Author Share Posted October 29, 2021 1 hour ago, JorgeB said: Becuase the devices are of different sizes, so the largest one can't be fully used, single mode will use both (but will be slower). Can't raid0 mode use the full capacity? Quote Link to comment
JorgeB Posted October 29, 2021 Share Posted October 29, 2021 No, because raid0 requires that all writes go to at least 2 devices, though I believe this has been/going to be changed in newer kernels, when there's only one device available it starts writing in single mode. Quote Link to comment
s1oz Posted October 30, 2021 Author Share Posted October 30, 2021 15 hours ago, JorgeB said: No, because raid0 requires that all writes go to at least 2 devices, though I believe this has been/going to be changed in newer kernels, when there's only one device available it starts writing in single mode. Will single mode write a file to two hard drives evenly? Or is it written to the second disk after the first disk is full? Quote Link to comment
JorgeB Posted October 30, 2021 Share Posted October 30, 2021 IIRC it will first write to the largest disk and when there's the same space available on both it will alternated from one to the other, in 1GiB chunks, so any file larger than that will use both. Quote Link to comment
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