Areca 24/4 Internal/External Port Pcie 3.0 12 Gb/s SAS/SATA Raid Controller 2Gb Cache - Manual (Page 205)

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WEB BROWSER-BASED CONFIGURATION
If there’s a certain location in the hard drive that is getting poor
performance, hard drive read benchmarks can help confirm this.
Above is a screenshot of a palimpsest benchmark on a hard
drive. The length time of firmware takes to complete the drive
test depends on its size.
6.10.2 SAS Chip Information
To view the SAS RAID controller’s SAS controller and attached
expander chip information, move the mouse cursor to the main
menu and click on the “SAS Chip Information” link. The SAS RAID
controller “SAS Chip Information” screen appears.
User can click on ROC controller and SAS expander # item on
the “SAS Chip Information” screen. It will show statistic page
for ports on the ROC controller and SAS expander#. Click on the
“Clear Error Log” to refresh the fully statistic page.