MD3620i and 3x MD1220 Expansion units - performance issue with SSD's

Question

We have a MD3620i and 3x MD1220 expansion units... and in these units we have a disk pool with 12 SSD's spread out over the system... 2 SSD's are in the 3620i, 2 in the 1st MD1220, 4 in the 2dn MD1220 and 4 in the 3rd MD1220.

the issue us we get poor performance to our SSD's read is about 750MB/sec max and write is about 120MB/s max. my thinking is the 6GB SAS link between each chassis is the actual bottle neck... but how can i verify this?

we also have the high performance tier license enabled.

thanks

Dell-DylanJ · Answer

Hello,

The best recommendation I can make is to assure that your configuration conforms to the best practices guide, as well as with the deployment guide.

MD3200i Best Practices Guide: https://dell.to/3s6UQUp

MD3200i Deployment Guide: https://dell.to/2OQ1wYK

If you could provide the firmware in place for the storage, in addition to the switch and connection speed, I may be able to assist further.

Dell-DylanJ · Answer

I'm looking through the CLI Guide and the Admin guide as we speak. I wanted to go ahead and share these two resources. I've not seen a way to do that yet, but that doesn't mean I just haven't found it yet, either.

CLI Guide: https://dell.to/2NE877U

Admin Guide: https://dell.to/2Nb85Vr

leroyl · Answer

thanks for the reply..

yes we have followed the best practice guide... Dell assisted us during our initial setup.

we have 4x 10GB ethernet ports, connected to 2x dell S5000 switches. then connected to our servers.

the firmware version of the controllers and also disk firmware is the latest version available.. I am not sure the version number.

Is there a way to look at the bandwidth usage of the 4GB SAS links between the head end unit and a expansion unit?

PowerVault

MD3620i and 3x MD1220 Expansion units - performance issue with SSD's

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