MSA 2060 DP+ Fault tolerance calculation

[James1234_12]

Hi All,

how to calculate MSA 2060 DP+ Fault fault tolerance?
HPE said DP+ using 2HDD for sparing and 20.1% for overhead.

how many hard drives can fail simultaneously? And how many hard drives can fail in total without disrupting the RAID?

if total number of HDD are 12, 18 and 24 and how caculate it?  

[Sahana_S]

Hello @James1234_12 ,

The fault tolerance is 2 drives at a single time, more drives can be lost when the rebuilds are complete.  In a 12-drive MSA-DP+ you can lose 4 drives over time without losing data (2 drives worth of SPARE capacity and the 2 drives of parity for RAID 6).  In larger disk groups you can lose more disks depending on the capacity of the disk group used.  

For more information, please refer to the below document.
MSA Virtual Storage Tech reference

I hope this helps!

Thanks and Regards,
Sahana S.