RAID 1+0, two volum...
 
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RAID 1+0, two volumes

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(@solussd)
Posts: 3
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I have 4 8TB disks configured as 2 8TB RAID 1+0 volumes and formatted HFS+. One of the volumes benchmarks about 100MB/s slower than the other (the first of the two is faster). 480MB/s vs ~380MB/s.

Any idea why this might be the case? Shouldn't they have virtually identical performance?

I'm using the beta SoftRAID 6 driver and software.

Attached are pictures of the two volumes.

Screen Shot 2020 11 21 at 4.20.01 PM
Screen Shot 2020 11 21 at 4.22.26 PM

 

 
Posted : 21/11/2020 5:24 pm
(@softraid-support)
Posts: 8008
Member Admin
 

You have to understand the mechanics on disk drives. The inner volumes are significantly slower.

 

This is a physics issue.

 
Posted : 21/11/2020 11:49 pm
(@solussd)
Posts: 3
Active Member
Topic starter
 

@softraid-support interesting- I didn’t realize that volumes were created “outside->in”. 

thanks!

 
Posted : 22/11/2020 12:17 am
(@softraid-support)
Posts: 8008
Member Admin
 

Yes, fastest, to slowest. Disk manufacturers don't want users to see the performance on the inner tracks. Since users rarely fill disks, they don't.

 
Posted : 22/11/2020 12:21 am
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