6 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
because it does not need to manage parity. However, with half of the DDMs in the group used
for data and the other half used to mirror that data, RAID 10 disk groups have less capacity
than RAID 5 disk groups.
1.3.2 Resiliency
The DS6000 series has built in resiliency features that are not generally found in small
storage devices. The DS6000 series is designed and implemented with component
redundancy to help reduce and avoid many potential single points of failure.
Within a DS6000 series controller unit, there are redundant RAID controller cards, power
supplies, fans, Fibre Channel switches, and Battery Backup Units (BBUs).
There are four paths to each disk drive. Using Predictive ...