Skip to main content
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.

Dell Storage Manager 2020 R1 Administrator's Guide

Data Caching and Redundancy

New and modified files are first written to the cache, and then cache data is immediately mirrored to the peer NAS controller (mirroring mode). Data caching provides high performance, while cache mirroring between peer NAS controllers ensures data redundancy. Cache data is ultimately transferred to permanent storage asynchronously through optimized data-placement schemes.

When cache mirroring is not possible, such as a single NAS controller failure or when the BPS battery status is low, NAS controllers write directly to storage (journaling mode).


Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\