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


Posts: 2
(@solussd)
New Member
Joined: 2 days ago

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

 

3 Replies
Posts: 2507
(@softraid-support)
Member
Joined: 5 years ago

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

 

This is a physics issue.

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1 Reply
(@solussd)
Joined: 2 days ago

New Member
Posts: 2

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

thanks!

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Posts: 2507
(@softraid-support)
Member
Joined: 5 years ago

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.

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