Slow 10Gbe Write, 8 bay NAS

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Groove1337
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Joined: Sat Feb 13, 2021 11:20 pm

Slow 10Gbe Write, 8 bay NAS

Post by Groove1337 » Sat Feb 13, 2021 11:29 pm

Hi there, hope you're all well!

I have a TVS-h1288X bought for video editing. It houses 2x 2TB 970 Evo Plus M2 SSDs for the OS and 8x Toshiba MG 16tb MG drives.

Read speed is 1000 mb/s, write is 250mb/s ish, has crept up to 360 on a 1tb file transfer at the moment. AJA speedtest gave it 235 write, 1003 read.

I was expecting faster read speeds and wondered if I can do anything to optimise?

Currently direct 10gbe connection with high end cable from the 10GBE port on the NAS to the 10Gbe port on a desktops ASROCK X570 Creator motherboard. I created a storage pool out of the 8 spinning disks, 20% space left for snapshots and raid 6. Left me with around 60tb, I used 50tb to create a shared folder for video editing which I mounted in windows and started testing on. 128k block size.

Any advice would be really appreciated, I'd love to get the write speeds nearer 500mb/s if at all possible. If the speeds I'm getting can't be improved with spinning disks, would adding 4 SATA SSDs and using them as a cache for the spinning volume mean write speeds would skyrocekt? If so, this will be my fallback plan.

Thanks for your time reading this

Bob Zelin
Experience counts
Posts: 1049
Joined: Mon Nov 21, 2016 12:55 am
Location: Orlando, FL.
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Re: Slow 10Gbe Write, 8 bay NAS

Post by Bob Zelin » Sun Feb 14, 2021 3:20 am

Hi - I responded and it disappeared -
ok - one more time

you should not be getting 250 MB/sec for your write speeds. Of course, 1003 MB/sec read is great. TURN OFF ALL YOUR CACHE - disable any cache you have created. You should have a single 8 drive RAID with eight matching 7200 RPM drives in RAID 6, thin provisioned. You do not need the snapshots, and you certainly do not want overprovisioning for SATA drives - this is just for SSD's. I assume you put your QuTS on the two M.2 drives - is that correct ?

It's very hard for me to diagnose your problems in a web forum like this. Typically, people hire me to set these things up.

bobzelin@icloud.com
Bob Zelin / Rescue 1, Inc.
http://www.bobzelin.com

Bob Zelin
Experience counts
Posts: 1049
Joined: Mon Nov 21, 2016 12:55 am
Location: Orlando, FL.
Contact:

Re: Slow 10Gbe Write, 8 bay NAS

Post by Bob Zelin » Fri Mar 05, 2021 2:35 am

Hi Groove1337 -
did you ever get your write speeds back up? You never responded.

Bob
Bob Zelin / Rescue 1, Inc.
http://www.bobzelin.com

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