User's Manual

l Direct I/O. Specifies that reads are not buffered in cache memory. When using direct I/O, data is transferred to the controller cache and the host system
simultaneously during a read request. If a subsequent read request requires data from the same data block, it can be read directly from the controller
cache. The direct I/O setting does not override the cache policy settings. Direct I/O is also the default setting.
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Disk Cache Policy
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Does my controller support this feature? See "Supported Features"
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Set the physical disk caching policy of all members of a Virtual Disk by enabling the Disk Cache Policy. When this feature is enabled, the physical disk writes
data to the physical disk cache before writing it to the physical disk. Because it is faster to write data to the cache than to a disk, enabling this feature can
improve system performance.
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The cache policies are:
l Enabled — Specifies that the disk cache policy is enabled.
l Disabled — Specifies that the disk cache policy is disabled.
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Non-RAID Controller Description
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The non-RAID SAS controllers are non-RAID controllers that support SAS devices. Because these controllers are non-RAID, they do not support virtual disks.
You can manage these non-RAID controllers and their attached SAS devices with Storage Management.
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Non-RAID SAS Controllers
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The following non-RAID controllers use Serial Attached SCSI (SAS) technology.
l SAS 5/i Integrated
l SAS 5/E
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Firmware/Driver Versions
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Use this window to view information about the controller firmware and drivers.
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Firmware/Driver Properties
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The firmware and driver properties can vary depending on the model of the controller. On some controllers, Storage Management may not be able to obtain
the driver or firmware version. In this case, Storage Management displays Not Applicable. Firmware and driver properties may include:
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NOTE: Cache policy is not supported on any controller that does not have a battery.
NOTE: On PERC 5 and PERC 6 controllers, for virtual disks based on SATA drives, the default Disk Cache Policy is Enabled; for virtual disks based on
SAS drives, it is Disabled.
NOTE: Supported features may vary from controller to controller.
Property
Definition
Firmware Version
This property displays the version of the firmware that is currently installed on the controller.
NOTE: On some controllers, Storage Management may not be able to obtain the firmware version. In this case, Storage
Management displays Not Applicable.