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Virtual Drive Size Capacity for the RAID array.
Virtual Drive Size Unit Capacity unit for the RAID array.
Stripe Size
Stripe size of the RAID array, that is, data block size for each drive, including
64KB, 128KB, 256KB, 512KB, and 1MB. The HBA-LSI-9540-LP-8i storage
controller supports only 64KB in the current software version.
Read Policy
Read cache policy:
• Read ahead—Enables read ahead capability. When this capability is
enabled, the storage controller can pre-read sequential data or
anticipate data to be requested and store the data in the cache
• No read ahead—Disables read ahead capability.
The HBA-LSI-9540-LP-8i storage controller does not support configuring a
read cache policy in the current software version.
Write Policy
Write cache policy:
• Write through—Enables the controller to send data transfer completion
signal to the host when the physical drives have received all data in a
transaction.
• Write back—Enables the controller to send data transfer completion
signal to the host when the controller cache receives all data in a
transaction. If the supercapacitor is faulty or no supercapacitor is
present, the Write through policy is used.
• Always write back—Uses the Write back policy even if the
supercapacitor of the storage controller is absent or faulty. If the server
is powered off, the controller cache loses its data because of lack of
power.
Access Policy
Read and write policy:
• Read/Write
• Read Only
• Blocked
I/O Policy
I/O policy:
• Direct—Enables the system to read or write data directly from or into a
drive by read operations (excluding read ahead operations) or by write
through operations of the storage controller.
• Cached—Enables the cache module to process all read and write
operations of the storage controller. Recommended only when
CacheCade 1.1 is configured.
The HBA-LSI-9540-LP-8i storage controller does not support configuring a
I/O policy in the current software version.
Drive Cache
Drive cache policy:
• Enable—Enables the controller to write data in the cache of physical
drives during the write process to improve write performance. If this
policy is used without a protection method in place, data will get lost
upon an unexpected power failure.
• Disable—Disables the controller from writing data in the cache of
physical drives during the write process. If this policy is used, data will
not get lost upon an unexpected power failure, but the write performance
will not as high as when drive caching is enabled.
• Unchanged—Uses the default drive cache policy.
Disable Background
Initialization
Enabling status of background initialization.
Default Initialization
Default initialization mode:
• NO.
• Fast.
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