Hp XP7 Storage Uživatelský manuál stáhnout pdf (Strana 30)

SDM; the default threshold is 0x500.When Level 1 Sleep is set to Disable, write I/Os to

volumes are not put in a wait status.

• Level 1: This level of control is performed when the sidefile capacity is equal to or larger than

the level-1 threshold, and is smaller than the level-2 threshold.

Write I/Os to volumes are put in a wait status by command retry when the sleep wait threshold

(that is, level-1 threshold) is exceeded.

• Level 2: This level of control is performed when the sidefile capacity is equal to or larger than

the level-2 threshold, and is smaller than the level-3 threshold.

Write I/Os to volumes are put in a wait status by SCP-SCI reporting when the SCP-SCI reporting

threshold (that is, level-2 threshold) is exceeded.

• Level 3: This level of control is performed when the sidefile capacity is equal to or larger than

the level-3 threshold.

Sidefile puncture will occur.

The following figure shows levels of controlling write data when the Donot Block option is disabled.

30 Controlling the amount of write data

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 36 37

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Hp XP7 Storage Uživatelský manuál Strana 30