I am thinking to introduce external SSD mdisks to an SVC mdiskgroup which already have RAID-5 arrays.
The question is what is recommended RAID array level for external SSD mdisks ? SVC best practices Redbook only talks about internal SSD arrays ( RAID0 and RAID1 ) but nothing mentioned about external SSD arrays?
Pinned topic Recommended RAID types for External SSD
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Updated on 2012-11-09T12:50:51Z at 2012-11-09T12:50:51Z by flennartz
flennartz 100000AQSF10 Posts
Re: Recommended RAID types for External SSD2012-11-09T12:50:51ZThis is the accepted answer. This is the accepted answer.Hello John
I would always choose RAID1 for SSD, internal or external.
SSD are not the best related to reliability, so the best way to minimize the risk is RAID1.
I confingured serveral RAID1 with just 2 SSD, so that I have the flexibility to use Easy Tier with several Storage Pools or to add or remove individual SSD-mdisk if I wish to do so.