HP Insight Control - Manual (Page 59)

Smart Array SCSI Drive Status
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Disk Reads/Sec—The number of reads from the drive each second
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Disk Writes/Sec—The number of writes to the drive each second
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Disk Read MBytes/Sec—The number of megabytes read from the drive each second
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Disk Write MBytes/Sec—The number of megabytes written to the drive each second
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Disk Millisec/Read—The average time for each read to complete
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Disk Millisec/Write—The average time for each write to complete
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Disk Queue Length—The average number of concurrent requests between the server and the drive SCSI
drive performance based on Disk Queue Length
Smart SCSI Drive Inventory
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Drive Information
Displays a description of the drive, including the size
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Displays the hard drive model number
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Displays the exact size of the drive as seen by the operating system
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Configuration Information
Provides a summary of the drive configuration
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Displays the name of the Smart Array controller to which it is attached
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Displays the location of the hard drive in its enclosure
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Displays the array in which the drive is configured
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Provides the SCSI protocol negotiated for transfers between this drive and the disk controller
SATA Drives
The following information is provided for a SATA drive.
SATA Drive Status
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Disk Read/Sec—The average number of reads from the selected SATA drive each second
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Disk Write/Sec—The average number of writes to the selected SATA drive each second
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Disk Read Mbytes/Sec—The average number of Megabytes of data read from the selected SATA drive
each second
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Disk Write Mbytes/Sec—The average number of Megabytes of data written to the selected SATA drive
each second
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Disk Millisec/Read—The average time required to complete a read operation
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Disk Millisec/Write—The average time required to complete a write operation
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Disk Queue Length—The average number of transfer requests (reads and writes) waiting to be serviced
by the SATA drive, including transfers currently being serviced and transfers waiting for service,
regardless of where the request is waiting (drive or controller)
Insight Control performance management uses a set of algorithms to determine the SATA drive status. The
Disk Queue Length is a primary parameter. However, when the value of the Disk Queue Length exceeds the
acceptable value, the Disk Reads/Sec and Writes/Sec are examined to determine whether read or write
operations require most of the drive throughput. When combined with Disk Millisec/Read or Write,
performance management can determine if the number of requests for the drive will exceed the capabilities
of the drive.
SATA Drives 59