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RAID 10 with 4x U.2 and HDD questions

(@ryanc)
New Member

Hello-

I'm looking at upgrading my RAID to SSD/U.2.  I have the highpoint quad u.2 PCIe card.   I know that even my 10gbe wont be fast enough to reach U.2 speeds, but one thing that can be annoying with the HDD's is when they have to wake up from spinning down.  Will switching to the U.2 setup work?

Also reads will always come from the 4x U.2 array? 

I have 4x 3.84TB PM983 drives, and a bunch of 3TB HDDs (all matching).  Could I use 6 of the 3TB drives for the mirror array?  The total drive size of the HDD array would be larger than the U.2 Array, I assume the total array would show the size of the smaller volume?

And the U.2 SSD's will be wake up faster I assue?

 

Thanks

 

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Topic starter Posted : 15/01/2021 8:59 am
(@softraid-support)
Member Admin

The way SoftRAID is designed with mixed drives (flash/HDD) is reads only happen from the solid state drives. So yes, the responsiveness waking from sleep should be near instant, for reads. Writes will still have some delay.

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Posted : 15/01/2021 1:17 pm
(@ryanc)
New Member

Awesome thanks, instant wake for reads is what I need.  Autosave keeps the HDD'S awake once we're working.

If I had a 4 drive u.2 raid 0 array mirrored with a HDD array, it would also lower access times?  I'm using the server in a recording studio to serve sessions, but am considering setting it up to serve sample libraries as well.  The HDD RAID 10 I have now works for this, but it seems that I'm getting close to hitting a bottleneck with read times for the sample libraries (these are read only in use).  I do have a 10GbE network, r/w speeds around 700MB/s, plenty of bandwidth, but slower access times with the HDD's.

Also does this all work the same with Softraid under windows?  If the main array is NTFS, can a mac access it via Tuxura or similar?  I'm toying with the idea of moving most of the workstations to windows and being able to go to a 100GbE network for them to get the full read speed of a 4 drive U.2 array.

Thanks for the help!

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Topic starter Posted : 17/01/2021 1:27 am
(@softraid-support)
Member Admin

@ryanc

RAID 0, the same it will be much quicker.

To get Mac/Windows compatibility, use SoftRAID for Windows. It will give good performance on both Mac and Windows. (HFS+ is the default OS)

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Posted : 17/01/2021 12:11 pm
(@ryanc)
New Member

Great thanks, two other questions-

 

Will softraid for windows work with Windows Server 2019?

 

And, if I were to run an Connectx-3Pro QSFP or FDR IB or higher, will it work with RDMA?

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Topic starter Posted : 20/01/2021 1:19 pm
(@softraid-support)
Member Admin

Waiting for an answer from development. I do not want to guess on this. (I believe I know, but want confirmation)

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Posted : 20/01/2021 7:42 pm
(@softraid-support)
Member Admin

Windows 2019 Server is not officially supported yet, but yes, it should work.

SoftRAID for Windows does not support RDMA, but the ethernet adapters will work fine.

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Posted : 21/01/2021 10:28 am
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