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Hi! Thanks for your concern. Actually not particular suspicious. Quite similar to arrangements on drives bought on Ebay that have 30 days "dead on arrival warranty", but no factory warranty. It was 3 days in this case, but still manageable as bought locally. I tested the drive by copying 1 TB of...

I bought 8 pcs of these drives for 2000 Hong Kong dollar (255 USD) each locally here in HK. Got 3 days "test warranty" from the seller. Have but them in my Qnap NAS and works very well. Not too much info discloused where they came from, but i could see like 500 of them in boxes at the place...

howdid you find these cards on taobao? any links? what did you search for?

All, I have connected two computers with Mellanox 40gbe. Computer 1: Threadripper 1950X with ConnectX-3 Pro EN MCX314A-BCCT Running Windows 10 Computer 2: I7-4790K on Asus Z97WS motherboard with ConnectX-3 Pro EN MCX314A-BCCT Running Windows Server 2016. Both having Samsung 970 SSDs...

now I tried NTttcp.exe -s -m 64,*,192.168.8.4 -t 60 -ns and got below output, which should indicate 1640 MB/sec. Bytes(MEG) realtime(s) Avg Frame Size Throughput(MB/s) ================ =========== ============== ================ 98429.500000 60.001 8731.576...

in the server i have an Asus Z97-WS motherboard. It uses a PLX chip to get more PCIe slot/lanes. Could that affect performance?

now tried nd_send_bw and looks like some very good Gb/s numbers.... but what is actually being measured here? PS C:\Windows\system32> nd_send_bw -a -C 192.168.8.4 #qp #bytes #iterations MR [Mmps] Gb/s CPU Util. 0 1 100000 2.483 0.02 100.00 0 2...

hummm.... not sure... but isn't that part of what happens in the performance tuning in the adapter properties page? Or how do i do this on windows?

when doing Get-SmbMultiChannelConnection on client, say client is not RDMA capable PS C:\Windows\system32> Get-SmbMultiChannelConnection Server Name Selected Client IP Server IP Client Interface Index Server Interface Index Client RSS Capable Client...

when I do ibv_stat i see below is Real rate: 32.00 (QDR) correct? CA 'ibv_device1' CA type: Number of ports: 2 Firmware version: 2.42.5000 Hardware version: 0x0 Node GUID: 0xec0d9a0300ea4390 System image GUID: 0xec0d9a0300ea4390 Port 1...

when i do Get-SmbClientNetworkInterface i get below. Server is RDMA capable, but not client. Is that correct? on client I get: Interface Index RSS Capable RDMA Capable Speed IpAddresses Friendly Name --------------- ----------- ------------ ----- -----------...

checked CPU usage. Single thread, most used CPU core like 30%. When doing 16 threads, the CPU start to see some work spread over a couple of cores. When i do netstat -t i see TCP 192.168.8.4:5201 DESKTOP-K8B34AS:50729 TIME_WAIT InHost TCP 192.168.8.4:5201...

the client is running a 1950X and the server an i7-4790k saw processor usage on client was like 5% when running iperf, but that is of course the full CPU. Will see what % the thread that seems to the the iperf job is having.

I am trying to connect a client windows 10 computer to a windows server 2016, with mellanox MCX314A-BCCT cards but getting bad speeds. Single stream Iperf around 5 gbit/sec, and up to around 12 gbit/sec maximum using 8 threads. I am trying to find some step by step instruction on how to...

i have been experimenting with cachecade, My conclsuion is that its not particularly good for sequential reads, which is what i care most about as i typically use the raid array on the server for backing up video editing projects, and copy the files to work station for working. And also use the...

i have one connected with 2 cables to a LSI 9361-8i, driving 11 HDDs and 4 SDDs. Have had no problem and been working flawlessly. Maybe you could try other cables?

How noisy is the EX4300 and how much power do it use?

im interest to know this too

Anyone know? Or anyone have experiences and comments around this switch to share? I like that it have 4X40gbe + 4X10gbe (with extra module) and a bunch of 1 gb connectors, so i can use one switch for everything. Not too good if is show out to pull 200 watts.... so power consumption and also...

i have found specifications for the different PSUs, but that is obviously different from actual power consumption.