LSI 3ware SAS 9750-8i Guía de usuario descargar pdf (Pagina 254)

Troubleshooting

242 3ware SATA+SAS RAID Controller Card Software User Guide, Version 10.0

off DPM does not clear the statistical data that has been recorded. To clear

the data, use the command /cx/px set dpmstat=clear [type=ra|lct|ext].

•

Display a DPM Summary. This shows whether DPM is On or Off, and

provides summary statistics for drives attached to a controller.

(/cx show dpmstat)

Note that if DPM is Off, this summary may still show data, although that

data will be static, and not changing over time. Disabling DPM does not

clear the existing data. That is done separately, on a per-port basis (see

below.)

You can also show a subset of summary data, for individual types of

statistics (instantaneous, running average, or extended drive statistics), by

specifying a type attribute with the command.

•

Display Specific Drive Statistic. On a per-port basis, you can display

five different statistical reports:

•

Instantaneous. This measurement provides a short duration average.

(/cx/px show dpmstat type=inst)

•

Running Average. Running average is a measure of long-term

averages that smooth out the data, and results in older results fading

from the average over time (/cx/px show dpmstat type=ra)

•

Long Command Times. This a collection of the commands with the

longest read/write response time. (/cx/px show dpmstat type=lct

•

Histogram Data. The histogram categorizes the read/write execution

times and group them together based on time frames.

(/cx/px show dpmstat type=histdata)

•

Extended Drive Statistics. The extended drive statistics refers to

statistics of a drive's read commands, write commands, write

commands with FUA (Force Unit Access), flush commands, and a

drive sectors's read, write, and write commands with FUA.

(/cx/px show dpmstat type=ext)

•

Clear Individual Statistic Counters. On a per-port basis, you can clear

specific statistic counters, using these commands:

• /cxpx set dpmstat=clear

• /cxpx set dpmstat=clear type=ra

• /cxpx set dpmstat=clear type=lct

• /cxpx set dpmstat=clear type=ext

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LSI 3ware SAS 9750-8i Guía de usuario Pagina 254

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