Nas4free question about RAID-Z2?

Put nas4free on a USB flash drive (embedded). Naturally asked questions what RAID to choose and decided to drive in a raid-z2 of 4 disks at 250GB same manufacturer, model, capacity, and seems even from the same batch, but the drives are not new and I got the already written-off (5 to 30 bad sectors) and I need just for exercise. I have based the principles of raid z2 was supposed to be 500GB of space, this is confirmed by different sources, but against all expectations I flaunts 928Gb free space.
How and why this happened, please explain!
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July 2nd 19 at 17:43
1 answer
July 2nd 19 at 17:45
Solution
You see here the pool size is equal always to the sum of all the drives that are included in it (zpool list).
If it is possible in the console to run zfs listyou will see the dimension of dataset, which is equal to ~500GB. You have this tab Dataset's in the interface. I guess there will be seen the real size.
That's what happened screenshot.ru/7a1b8b3a778226887baf586d5656849d.png - Delpha_Cummin commented on July 2nd 19 at 17:48
: Well, that came together. Data_pool = 122G+313G = 435G, that a stretch and it turns out 500G - Jensen.Rosenbaum commented on July 2nd 19 at 17:51
So no these 122G, it's where I recorded the max a couple of gigs - Delpha_Cummin commented on July 2nd 19 at 17:54
SKREPKA123: Agreed. And show the output of zfs list -r-t all - Jensen.Rosenbaum commented on July 2nd 19 at 17:57
: screenshot.ru/31e52ef9833a75e326ece8570400a629.png - Delpha_Cummin commented on July 2nd 19 at 18:00
I can't explain why. Look for the documentation for the answers... - Jensen.Rosenbaum commented on July 2nd 19 at 18:03
All figured out, I remembered that I put the minimum amount of datasets =) - Delpha_Cummin commented on July 2nd 19 at 18:06
: Thank you for the clarification and useful commands. - Delpha_Cummin commented on July 2nd 19 at 18:09
: you try to perform
zfs list -o space
There is a field USED will be presented read more - Jensen.Rosenbaum commented on July 2nd 19 at 18:12
: I already found the reason, see above) - Delpha_Cummin commented on July 2nd 19 at 18:15
: Super I was thinking. The command above it would show) - Jensen.Rosenbaum commented on July 2nd 19 at 18:18

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