ioSafe R4 Performance

P/N: 900-10004-00 REV 02 USER GUIDE, IOSAFE R4

Performance

If you wish to tweak the system performance, select the

Performance

tab in the

System

menu.

Note that some of the settings suggest that you utilize an Uninterruptible Power Supply (UPS)

before enabling that option.

Select

Disable full data journaling

to substantially improve disk write performance. During an

unexpected power down without battery backup, there is a small chance that parity written to a disk

in a RAID set may become out of sync with the data disks, possibly causing incorrect data to be

recovered if one disk fails.

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 will improve disk write performance slightly.

Note

You can buy a UPS with USB monitoring at a very reasonable cost. By

safely allowing the performance options to be checked, you can effectively

double your write performance and provide uninterrupted service of your

ioSafe R4 for a very low price.