Do you have the high performance tier license? https://dell.to/3u7lAYW That document has some other performance information as well. It may also be a limitation of the controller cache or pcie lanes. Let us know if you have any additional questions.
Is the performance the same with real world data usage and not artificial load? Are the drives from Dell? Have you tried with fewer drives and different sets of drives? It is possible a drive is not performing well or failing and holding back the whole array. In addition, you may want to try different cables.
Triying with fewer drives and different sets of drives can show if it is a current configuration problem or the problem might be on a different reason.
Regarding the cables, is the same logic.. When you have performance issues it's difficult to find out the problem.. You need to discard options until you get to a conclusion.
maa1
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39 Posts
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January 25th, 2022 12:00
Yes, HPT enabled (without HPT bench show W/R=309/539).
But 733 MB/s is too low even for systems without HPT!
DellEMCSupport
631 Posts
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January 25th, 2022 12:00
Hi,
Do you have the high performance tier license? https://dell.to/3u7lAYW That document has some other performance information as well. It may also be a limitation of the controller cache or pcie lanes. Let us know if you have any additional questions.
DellEMCSupport
631 Posts
0
January 25th, 2022 13:00
Is the performance the same with real world data usage and not artificial load? Are the drives from Dell? Have you tried with fewer drives and different sets of drives? It is possible a drive is not performing well or failing and holding back the whole array. In addition, you may want to try different cables.
maa1
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39 Posts
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January 27th, 2022 02:00
>>Is the performance the same with real world data usage and not artificial load?
for example - file copy between logical disks inside VM:
>>Are the drives from Dell?
Yes
>>Have you tried with fewer drives and different sets of drives?
No
>>It is possible a drive is not performing well or failing and holding back the whole array.
drives look good - no errors in the log
>>In addition, you may want to try different cables.
why?
maa1
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39 Posts
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January 27th, 2022 08:00
>>Triying with fewer drives and different sets of drives
this storage is in use and I can't delete an existing virtual disk
>>When you have performance issues it's difficult to find out the problem.. You need to discard options until you get to a conclusion.
my guess - a very unoptimized for QD=1 firmware MD3220
DiegoLopez
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2.7K Posts
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January 27th, 2022 08:00
Hello @maa11,
Triying with fewer drives and different sets of drives can show if it is a current configuration problem or the problem might be on a different reason.
Regarding the cables, is the same logic.. When you have performance issues it's difficult to find out the problem.. You need to discard options until you get to a conclusion.
Regards.