Re: New Large P9 SSD - 931 GB, 1.86 TB, 3.72 TB, and 7.45 TB - what are new rules for minimum number of arms -- MIDRANGE-L

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Remember: "Rule of thumb"

You are correct in a limited number of cases some guy coming for example from a model 300 to a POWER9 might survive on 2 SSDs mirrored. (YES we have a customer doing exactly this.)

But the last thing we want people doing is crippling the capability of their new server because someone sold them only two drives because 'They are SSDs and Incredibly fast' without doing the proper sizing.

- Larry "DrFranken" Bolhuis

www.Frankeni.com
www.iDevCloud.com - Personal Development IBM i timeshare service.
www.iInTheCloud.com - Commercial IBM i Cloud Hosting.

On 8/9/2018 11:42 AM, Rob Berendt wrote:

"Not fewer than 6 on any production system." is a good general rule of
thumb.
Awfully hard to swallow on someone coming from a 300 GB system to now
having 6 drives (not counting hot spares) each of about that size.

Some have said their system was so old and slow that they felt they could
violate that rule and the users would still be impressed with their new
system.

Rob Berendt

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