Re: Excessive disk drive failures?

["Larry \"DrFranken\" Bolhuis" <midrange@xxxxxxxxxxxx>]

In my career I have seen three drives die in a single day on a system 
with three RAID sets. Incredibly one drive per RAID set in that case. I 
also proactively replaced a large number of drives (triple digits) at a 
large POWER7 customer because the failure rate was not acceptable. And 
of course many many others over the years.

Rule one is stay current on PTFs. Those three drives above? NOT Failed 
in reality but falsely called out and with PTFs the customer had no 
additional failures.

 - DrF

On 5/19/2021 8:01 AM, Jim Hawkins wrote:
> We have had our 9009 system for about 2 1/2 years. We have 10 59E1-099 drives with 8 in a RAID 10 configuration and 2 hot spares. We have replaced at least 4 of these drives in the time we have had this system, 3 of these drives have failed in the last 14 months, which seams excessive to me.  In my previous 20+ years, I think I have only had 3 drives fail. Have I just been fortunate before? Is this a normal disk failure rate?  Is this particular design just more failure prone?
>
> Regards,
>
> Jim Hawkins
> Programmer Analyst
> Interkal LLC