System Drives
System Administration Manual
139
The
Allow/Deny Access
button will set the access to the System Drive: Allowed or Denied.
The
Forget
button will remove a System Drive from the Titan SiliconServer’s configuration. The
System Drive must be
Not Present
for it to be deleted.
The
Delete
button will delete the System Drive on a FC-14 or FC-16 storage enclosure.
Super Flush
Super Flush is a performance optimizing technique Titan uses to maximize the efficiency with
which write requests are sent to System Drives. Super Flush only applies to RAID 5 arrays and
is configured by setting the following parameters:
•
Stripe size: Also referred to as the segment size, this setting defines the size of the data
patterns written to individual disks in a System Drive. The value specified for the stripe
size should always match the value configured at the RAID controller. In most cases, the
stripe size should be set to 32 KB.
•
Width: This is the number of disks that can be written to in a single write request. A
typical system drive will contain
n
data disks and one parity disk. This type of array is
often referred to as
n+1
. In such an array, a single write request can be made to
n
number of disks. In other words, the width will typically be set to the number of disks in
the system drive, minus one.
Super Flush parameters are automatically configured for optimal performance on all System
Drives in all storage enclosures.
FC Path
Identifies the Current and Preferred
paths
through which a System Drive is
accessed.
Storage Pool
Configuration
Information about the Storage Pool residing on the System Drive:
•
Storage Pool Label: The label of the Storage Pool hosted by this System
Drive.
•
Storage Pool Status: The current health of the Storage Pool.
Mirror
Configuration
Provides the following information on the primary and secondary System Drives:
•
The label assigned to the System Drives when created.
•
The number identifying each System Drive.
•
The name of the rack to which each System Drive belongs.
•
Role classifying whether the System Drive is primary or secondary.
•
Status indicating each System Drive’s functional state.
