Disk Cache Policy (RAID Settings).

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Disk cache policy - Disk Cache Policy

The disk cache policy determines whether the hard disk write cache is enabled or disabled.

  • When the Write Policy is set to Write-Thru, the disk cache policy can have a very large impact on write performance.
  • When the write policy is set to write-back mode (Write-Back), the impact of the disk cache policy is much smaller and in many cases negligible.
  • When the disk cache policy is enabled, there is a risk of losing data in the hard disk cache in the event of a power failure.
  • Data loss may be irreversible and may require restoring data from a backup device.
  • Protection against power failures is very important.
  • UPS with redundant system power supplies is strongly recommended.
  • RAID Backup Battery Unit (BBU) can provide additional protection.

 

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