HP NetRAID 1Si Controller - Manual (Page 85)

Chapter 4 HP NetRAID Express Tools
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Objects Menu
Choose the Objects option from the HP Express Tools Management Menu to
access the adapters, logical drives, physical drives, and SCSI channels
individually. You can also change settings for each object. The Objects submenu
options are described below.
Adapter
To modify parameters of an HP NetRAID Series adapter or an integrated
HP NetRAID controller, choose Adapter from the Objects menu. After selecting
your adapter, the following submenu is displayed.
•
Reset to Default Settings: Resets all user-defined parameters of the
selected adapter to the factory default settings.
•
PowerFail Safeguard: If enabled, this feature prevents data loss if the
power fails during a reconstruction. The default setting is Enabled. For a
complete discussion of this feature, see "Power Fail Safeguard Feature" in
Chapter 5, "Reconstructing and Rebuilding the Drive," in this guide.
•
Memory Type: Displays the type of memory installed for HP NetRAID.
•
Read Modify Write Mode: Selects between Read Modify Write Mode
and Read Peer Mode.
◊ The default setting is OFF, which selects Read Peer Mode. This is
appropriate if there are three physical drives in the arrays supporting
RAID 5 logical drives.
◊ When set to ON, Read Modify Write Mode is selected. This improves
performance in RAID 5 logical drives only if the number of physical
drives in the array is four or greater.
∗
Read Modify Write Mode set to ON requires complete initialization
of new logical drives controlled by the adapter.
NOTE The complete initialization required for Read Modify Write
Mode can take up to several hours for a large logical drive.
∗
Changing the Read Modify Write Mode setting to ON immediately
forces consistency checks of all existing logical drives controlled
by the adapter.