Adaptec 2010S - SCSI RAID Storage Controller Uživatelská příručka stáhnout pdf (Strana 89)

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Adaptec Storage Management Software User’s Guide

I/O statistics are displayed in the Hard Drive I/O Statistics

window, as shown in Figure 3-17.

Figure 3-17 Hard Drive I/O Statistics Window

The Hard Drive I/O Statistics window displays the following

information:

I/O

Commands

The number of Read and Write commands issued by

the computer to the controller. If you use RAID and

caching, the number of commands issued to the

drives can differ significantly from this value.

Total Sectors The total number of sectors read and written from

the host computer.

Cache Hits The total number of sectors (read or written from

the host computer) that were found in the controller

cache and did not require a disk access.

Cache Misses The total number of sectors that were not accessed

from the controller cache, thus were read directly

from the disk.

Read-Ahead

Hits

The number of the cache hits for data read requests

satisfied by data held in the cache from previous

disk read-ahead operations.

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Adaptec 2010S - SCSI RAID Storage Controller Uživatelská příručka Strana 89