NETGEAR Business Edition manual Adding a UPS for Performance

ReadyNAS Pro Business Edition User Guide

•Select Enable disk write cache if you want to allow disk write requests to be acknowledged by the disk before data is written out to the platter. This can give a big boost to write performance, with a drawback that there is a slight chance that unwritten data in the write cache will be lost in the event of a power failure.

•Select Disable journaling if you understand the consequences of this action, and you do not mind a long file system check (only after unexpected power failures). File system journaling allows disk checks of only a few seconds verses possibly an hour or longer without journaling. Disabling journaling improves disk write performance slightly.

•The Optimize for OS X option provides the best performance in Mac OS X environments when connected to the ReadyNAS Pro Business Edition through the SMB/CIFS protocol. This option, however, introduces compatibility issues with Windows NT 4.0; do not enable this option if this device will be accessed by Windows NT 4.0 clients.

•The Enable fast CIFS writes option allows for fast write performance by enabling aggressive write-back caching over CIFS. Do not enable this option in multi-user application environments such as Quick Books where synchronized writes are necessary to keep files in sync.

•The Enable fast USB disk writes option speeds up USB write access by allowing access to the USB device in asynchronous mode. If you enable this option, do not remove the USB device without properly unmounting it. Failure to do so can compromise data integrity on the device.

Adding a UPS for Performance

Adding a UPS to the NAS is an easy way to protect against power failures. Simply connect the ReadyNAS power cable to the UPS, and connect the UPS USB monitoring cable between the UPS and the ReadyNAS. The UPS is detected automatically and shows up in the Status bar. Move the mouse pointer over the status light to display device information, or click a status light to display the status in more detail. You can move the mouse pointer over the UPS LED icon to display the current UPS information and battery life.

Figure 5-2

You are notified by e-mail whenever the status of the UPS changes; for example, when a power failure forces the UPS to be in battery mode or when the battery is low. When the battery is low, the NAS device automatically shuts down safely.

5-2 Optimizing Performance

v1.3, November 2008