Disk Analysis
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One of the most common causes of performance problems is an I/O bottleneck.  SarCheck identifies busy disks and slow disks. A variety of filtering and sorting options are available to help you manage very large systems with thousands of disk devices.

 

The disk device c0t6d0 was busy an average of 2.39 percent of the time and had an average queue depth of 2.2 (when occupied). This indicates that the device is not a performance bottleneck. The average service time reported for this device and its accompanying disk subsystem was 20.3 milliseconds. This is somewhat slow for a modern disk drive, and the disappointing performance may be due to the disk or its controller. Service time is the delay between the time a request was sent to a device and the time that the device signaled completion of the request.