
P/N:  900-10004-00 REV 02  USER GUIDE,  IOSAFE R4   
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The 
Optimize for OS X 
option provides the best performance in Mac OS X environments when 
connected to the ioSafe R4 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 Quickbooks where synchronized writes are necessary to keep files in sync. 
The 
Enable fast USB disk writes 
option speeds up USB write access by accessing 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, but as mentioned in the 
System Performance
 section, a UPS can also safely allow for a more aggressive performance 
setting.  Simply connect the NAS power cable to the UPS and connect the UPS USB monitoring 
cable between the UPS and the NAS.  The UPS will be detected automatically and will show up in 
the Status bar.  You can move the mouse pointer over the UPS LED icon to display the current 
UPS information and battery life.  
Note 
Alert notification and automatic system optimization is available only with a 
UPS that utilizes a USB monitoring interface. 
You are notified by email 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 b attery is low, the 
NAS device automatically shuts down safely.  
Make sure to adjust the optimization settings in the Performance tab if you wish to take advantage 
of the available options.