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ATA disk

The following information is provided for an ATA disk.

ATA Disk Status

• Reads/Sec—The number of reads from this ATA disk each second

• Writes/Sec—The number of writes to this ATA disk each second

• Read MBytes/Sec—The average number of megabytes read from the ATA disk each second

• Write MBytes/Sec—The average number of megabytes written to the ATA disk each second

• Millisec/Read—The average time for each read to complete

• Millisec/Write—The average time for each write to complete

• Queue Length—The average number of concurrent requests between the server and this ATA

disk (Queue Length is the primary indicator of ATA disk performance, whether the disk is part

of an array)

ATA Disk Inventory

• Disk Information—Displays a description of the drive, including the hard drive model number

• Configuration Information

Provides a summary of the drive configuration◦

◦ Displays the name of the IDE controller to which it is attached

◦ Indicates to which disk array the disk belongs (if applicable)

Fibre Channel host bus adapter

The following information is provided for a Fibre Channel HBA.

Fibre Channel Host Bus Adapter Status

• Transfers/Sec—The average number of transfers on the selected HBA each second

• MBytes/Sec—The average number of megabytes transferred on the selected HBA each second

• Millisec/Transfer—The average time to complete a data transfer between the server and the

storage attached to the selected HBA

• Queue Length—The average number of concurrent requests between the server and this HBA,

including transfers currently being serviced and transfers waiting for service, regardless of

where the request is waiting

• Port Utilization %—The average utilization of the Fibre Channel port on this adapter.

Performance is determined by comparing the MBytes/Sec with the theoretical throughput (1 or 2

GB/s) of the HBA.

Fibre Channel Host Bus Adapter Inventory

• Host Bus Adapter Configuration—Displays the name of the HBA and the supported and

negotiated PCI protocol (bus speed) of the HBA

• Fibre Channel Enclosures—Displays all enclosures assigned to the HBA, the names of the

enclosures, and the enclosure models

• Windows/Linux Physical Disks—Displays all physical disks traced from the server to the logical

drives on the accessible enclosures

Network storage controller

The following information is provided for a network storage controller.

58 Measurement parameter matrix

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