Larry / Rob,

Is there an indicator or something to tell you how much life is left on an SSD?
How does one even attempt to predict SSD life expectancy?

So writes, updates, deletes will reduce life expectancy.
Reads are fine?

Rob, your Power8 SSD are only about a year old.
Do you think they failed due to EOL or other failure?

Back in Feb, 2015 I replaced 18 177gb SSD (3 + years with no failures) with 13 775gb for space reasons and maintenance savings.
Never realized I was also renewing my SSD life expectancy at the same time.
Correct me if I'm wrong, the SSD come with a 3 year warranty, SSD maintenance kicks in starting in year 4.


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Tuesday, August 04, 2015 10:02 AM
To: Midrange Systems Technical Discussion
Subject: RE: SSD performance article

So what would be the normal life expectancy for a SSD, 3, 5, 10 years?

I think that would depend on writes. IOW, YMMV. Try a never ending repetition of CRTNWSSTG followed by DLTNWSSTG if you really want to put it through the paces.
IBM curtails certain commands from working on SSD's to keep yourself from shooting yourself in the foot. Like STRASPBAL *USAGE, STRDSKRGZ, etc.

I have three Power 8's. Each one has lost at least one drive. Two of the three are running SSD's. I'm a big fan of Raid 5 with hot spare. Sure, there some naysayers that say RAID5 and RAID6 are both obsolete due to disk size, etc. Their charts may be saying one thing, but my experience is saying another.

Rob Berendt
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755

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