Product specifications

Infortrend
4-4
Page
Choose “Optimization for Random I/O” or “Optimization for Sequential
I/O,” then press [ENTER]. The “Random” or “Sequential” dialog box will
appear, depending on the option you have selected. Choose Yes in the
dialog box that follows to confirm the setting. Press [ESC] to exit and the
setting will take effect after the subsystem is restarted.
NOTE:
There is no longer a 512GB threshold for array optimization modes. If
an array is larger than 16TB, only the optimization mode for sequential
I/Os can be applied. Since logical drives of this size may not be
practical, there is actually no limitation on the optimization mode and
array capacity.
4.2.4 Write-Back Cache Enable/Disable
Figure 4 – 3: Write-Back Cache Enable/Disable Page
As one of the submenus in “Caching Parameters,” this option controls the
cached write policy.
Choose Caching Parameters, then press [ENTER]. Select Write-Back
Cache, then press [ENTER]. “Enabled” or “Disabled” will display the
current setting with Write-back caching. Choose Yes in the dialog box that
follows to confirm the setting.
Write-back caching can dramatically improve write performance by
caching the unfinished writes in memory and letting them be committed to
drives in a more efficient manner. In the event of power failure, a battery
backup module can hold cached data for days.