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804 posts

Ultimate Geek
+1 received by user: 353


  # 2263174 24-Jun-2019 09:08
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So after shuffling a couple of drives around I have found the issue with storage spaces behaving weirdly.


One of the new sata cables I put in was dodgy, which was causing drive write failure attempts on one drive.


Who would have thought.




Anyway - thanks for everyones help - today - storage spaces, tomorrow (or when I get a couple of days off and want a project) Unraid.



So what is your final configuration and performance? Did you leave it configured as 'battery backed'?



230 posts

Master Geek
+1 received by user: 25

  # 2263314 24-Jun-2019 12:17
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Still moving data as we speak, but will end up at a 6 drive Parity Storage Space.


With 3 drives getting reasonably consistently getting 25 - 30mb write speed.


It can be a little peaks and troughs, but much much faster.


And yes - setting is that it's battery backed.


230 posts

Master Geek
+1 received by user: 25

  # 2264072 25-Jun-2019 14:10
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So after a 4TB copy - Teracopy says average speed is 21MB/s with 3 drives.


Just added a 4th, and setting up a 3TB copy.

230 posts

Master Geek
+1 received by user: 25

  # 2267331 30-Jun-2019 15:16
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After getting my hopes up I have had them dashed again.




I was getting 20mb + writes and 60MB+ reads.


Now I am getting about 10% of that and have been for 3 days. My new strategy is bugger this for a laugh - I am going back to physical drives.


It should be easier to move to unraid later on if I do that as well.

230 posts

Master Geek
+1 received by user: 25

  # 2270459 5-Jul-2019 12:54
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And further to all this it may be the drives I am using. It turns out the are SMR drives which and have some write performance issues under sustained writes.


So yeah - fun times to be had by all.


Thanks Anandtech for pointing this out


I will say from a general plex server style drive, these do very well. I am 100% satisfied overall with these drives, I am however extremely dissatisfied with how finicky storage spaces was and how difficult this whole experience has been to troubleshoot.


The fact these are smr drives and do have issues with writes like this does make me wonder what performance will be like under unraid as well.

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