D-Link DSN-2100 xStack Storage, Руководство пользователя

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64 Chapter 5 Configuring the xStack Storage Array
Figure 5-18 Advanced Screen - Closeup
5.4.1.4.1 Write-protecting Volumes
Write-protecting a volume protects the data on the volume from being copied over or deleted
either intentionally or by accident. On the “security” area of this screen, selecting
Please set
this volume to “Read-Only " adds write-protection to the volume, while selecting Do not set this
volume as “Read-Only” removes write-protection. If an attempt is made to write data on a
write-protected volume, the xStack Storage Array reports this attempt to the initiator requesting
access to the volume and returns an error should any initiator try to write data. If the
Read-Only
selection is changed on this screen, the change takes effect immediately.
5.4.1.4.2 Disabling Sync Cache Commands
Some applications that stream media such as video can suffer performance problems if the host
file system sends the SCSI Sync Cache command repeatedly. This command tells the xStack
Storage Array to write to disk all data residing in cache. If you run applications that are sensitive
to the Sync Cache command, you can configure the xStack Storage Array to ignore Sync Cache
commands from the host. Doing so, however, places your data at greater risk than if the Sync
Cache command was not ignored. . If the Sync Cache command selection is changed, the change
takes effect immediately.