Solid State Disks

The NDA at the HP event I’m at while typing this won’t let me talk about most of what I’ve learned.  An interesting thing came up: Solida State Disks.

Putting more SSD’s in your SAN than you have controllers for performance reasons is illogical, e.g. your controller cache can only perform as fast as 1 SSD.  Adding more SSD’s slows down the SSD’s!

SSD’s have a limited life such as USB sticks. A typical SSD component can have a life time of 10,000 writes.  SSD’s have spare capacity for replacing bad blocks.  When you run out of spare capacity then your SSD becomes an expensive read only device.

It’s really good for not-frequently changing data, e.g. a hypervisor, corporate streaming media, etc.

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