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Drive selection for expanding Hyper-V cluster (Speed vs HDD vs SSD)

I’m just spec’ing up an additional Dell MD1200 drive shelf for my VRTX to add additional storage capacity.

Drives in this shelf will contain VHDX files for my VM’s that run on the hyper-v cluster.

I will have 12 new bays to choose drives for.

Based on performance and recognising that this chassis only support 6G speed, what drive speeds should I be looking for?

With 12 slots I could go for 12 x 2Tb drives in RAID 10 for example or 8 HDD and 4 SSD. There is also a choice of 7.2k and 10k drives.

The way I have my File Server VM’s configured I have a separate VHDX for the C: Operating System and another for the D: data.

In the past I have placed the C: VHDX on faster storage, is this worthwhile?

I have run some speed tests on my existing drive arrays and cannot see any discernible difference in performance between the drive and RAID types.

Thanks in advance for ideas and suggestions.

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