November 9, 20223 yr Hi All, still trying to diagnose my speed issues with a Dell R750 dual Gold CPU 1Tb memory NVME, etc tested alot and my final test i think i have gotten to is a fresh reboot and not start the array. I have then done a dd test to the ramdisk and i would have expected better speeds? Writing to the 18 disk array i get about 10-15MB and reading i get 20-30MB Installed windows server 2022 as a test and speeds are fine can max out the 10GB nics... Edited November 10, 20223 yr by ocexperts
November 10, 20223 yr You have 1TB memory ? Below is test on a Intel J1900 and 9700k system time dd if=/dev/zero bs=1024k of=tstfile count=1024 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 1.72748 s, 622 MB/s real 0m1.736s user 0m0.014s sys 0m1.708s /dev/shm# time dd if=/dev/zero bs=1024k of=tstfile count=1024 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.454901 s, 2.4 GB/s real 0m0.458s user 0m0.002s sys 0m0.454s How about to /dev/null ? time dd if=/dev/zero bs=2M of=/dev/null count=1024 1024+0 records in 1024+0 records out 2147483648 bytes (2.1 GB, 2.0 GiB) copied, 0.530346 s, 4.0 GB/s real 0m0.539s user 0m0.019s sys 0m0.516s time dd if=/dev/zero bs=2M of=/dev/null count=1024 1024+0 records in 1024+0 records out 2147483648 bytes (2.1 GB, 2.0 GiB) copied, 0.131551 s, 16.3 GB/s real 0m0.140s user 0m0.006s sys 0m0.134s Edited November 10, 20223 yr by Vr2Io
November 10, 20223 yr Author Thanks for the reply Vr2Io but i just worked it out.. kinda i disabled 14 of the 16 dim slots via bios and its now freaking fast! Its a beast of a server brand new Dell R750, dual 6330, 1Tb memory, 10 x 1.92tb NVME, 2 x 9400-16e talking to 12 x 16tb, 8 x 10tb can work with 128gb mem for the moment, just been without for 2 weeks so keen to get everything set back up! once online ill then start playing with the memory config as i think its a server issue.. while dell shipped the server with all memory populated in the first 8 dimms and dell can "optimised" thats not the actual channel config.. ill change the memory into the channel groups when i get back home in a couple of weeks.. idrac has been so handy while building haha
November 10, 20223 yr 2 minutes ago, ocexperts said: Its a beast of a server brand new Dell R750, dual 6330, 1Tb memory, 10 x 1.92tb NVME, 2 x 9400-16e talking to 12 x 16tb, 8 x 10tb Crazy 👍 3 minutes ago, ocexperts said: as i think its a server issue Agree
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