Disks
This area displays the activities by the individual block devices.
Parameter Description
Device Device (or partition) name as listed in the /dev
directory.
Avg queue len Average queue length of the requests that were
issued to the device.
Reads (sector)/sec Number of sectors (kilobytes, megabytes) read from
the device per second.
Writes (sector)/sec Number of sectors (kilobytes, megabytes) written to
the device per second.
Transfer/sec Number of transfers per second that were issued to
the device. A transfer is an I/O request to the device.
Multiple logical requests can be combined into a
single I/O request to the device. A transfer is of
indeterminate size.
Avg wait Average time (in milliseconds) for I/O requests
issued to the device to be served. This includes the
time spent by the requests in the queue and the time
spent servicing them.
% Util Percentage of elapsed time during which I/O
requests were issued to the device (bandwidth
utilization for the device). Device saturation occurs
when this value is close to 100%.
INSTALLATION AND CONFIGURATION MANUAL X-One 1.7
6. Monitoring and Support 31
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