Dell Shared PowerEdge RAID Controller (PERC) 8 For Dell PowerEdge VRTX Systems User’s Guide
Performance variations between write-back and write-through cache modes
Performance is highly variable across configurations, drive type, applications and IO workloads. The write performance of write-through mode is typically lower than that of write-back mode. Some configurations and workloads exhibit significant performance deltas.
Evaluate your needs for maximum I/O performance (a single Shared PERC 8 configuration) versus maximum data protection (a Fault Tolerant Shared PERC 8 configuration).
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