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Configure raid5 with cachecade

A

ascoolasice79

Junior Member
I have a Dell H710p Controller which is a rebranded LSI 9266-8i Raid-Controller with CacheCade 1.0 and 4x WD Green Drives and 1x 256GB Plextor M5Pro. I want to configure a Raid5 virtual volume with cachecade and I'm looking for the best configuration (Read/Write/IO/Disk Policy).

It's my first raid controller, so can you help me?
 
tinkertry.com

it's pretty straightforward using MSM. Cachecade 1.0 is read only and if the ssd fails, it just falls back to normal mode. Cachecade 2.0 is read/write and if the ssd fails, bad mojo.

Just give it a shot, you usually have to play around with strip size to get optimal performance for your specific application. RAID-5 is going to suck on writes, but is fastest on reading. So cachecade read-only mode may not do miracles.

remember the speed of the ssd will limit the raid-5 behind it. ie if the 4 green drives can outrun that one ssd, you may find latency your only gain or worst a cap on max linear reads.

Can you upgrade to read/write cachecade 2.0? That's where you'll see the write speeds go from horrific to okay.

Btw make sure you are using RE4-GREEN drives, that controller will throw regular consumer drives in the trash so fast it's not funny.
 
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