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Hardware RAID on the Raspberry Pi CM4

A few months ago, I posted a video titled Enterprise SAS RAID on the Raspberry Pi... but I never actually showed a SAS drive in it. And soon after, I posted another video, The Fastest SATA RAID on a Raspberry Pi.

Broadcom MegaRAID SAS storage controller HBA with HP 10K drives and Raspberry Pi Compute Module 4

Well now I have actual enterprise SAS drives running on a hardware RAID controller on a Raspberry Pi, and it's faster than the 'fastest' SATA RAID array I set up in that other video.

A Broadcom engineer named Josh watched my earlier videos and realized the ancient LSI card I was testing would not likely work with the ARM processor in the Pi, so he was able to send two pieces of kit my way:

What does Nvidia buying ARM mean for Raspberry Pi?

Over the weekend, Nvidia confirmed it would purchase ARM from Softbank for $40 billion.

Now, what is ARM, why is Nvidia buying it, and what does any of this have to do with the Raspberry Pi?

Well, let's start with ARM.

This blog post also has a video version to go along with it.

What is ARM?

ARM can refer to a number of things, but let's start by talking about the company, Arm Holdings. They have lineage dating back to Acorn computers, a British computer manufacturer founded in the late 1970s that designed the first 'Acorn RISC Machine architecture' chips, AKA 'ARM'.

BBC Micro Minicomputer - Source: Wikipedia