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XStack Storage User’s Guide 117

5.5 Performing Cache Activities

The XStack Storage unit contains cache memory for storing I/O activity and data. The File menu

provides options for setting the cache mode and flushing cache contents.

5.5.1 Setting Cache Mode

The XStack Storage unit is capable of caching write operations. Write-back caching saves the

system from performing many unnecessary write cycles to the system RAM, which can lead to

noticeably faster execution. However, when write-back caching is used, writes to cached

memory locations are only placed in cache and the data is not written to the disks until the

cache is flushed. When caching is disabled, all read and write operations directly access the

physical disks. By default, write-back cache mode is always enabled and cannot be disabled.

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D-Link DSN-1100-10 - xStack Storage Area Network Array Hard Drive Guide de l'utilisateur Page 117