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read-ahead cache mode - Disabled
An option of the read-ahead cache mode. When the read-ahead cache mode is
disabled, the ServeRAID controller transfers data from the logical drive to its local
cache in increments equal to the system I/O request size. This optimizes
performance when the workload is random or the system I/O requests are smaller
than the stripe-unit size.
read-ahead cache mode - Enabled
An option of the read-ahead cache mode. When the read-ahead cache mode is
enabled, the ServeRAID controller transfers data from the logical drive to its local
cache in increments equal to the stripe-unit size. This optimizes performance when
workloads are steady and sequential.
ready
A physical-drive state in which the drive is available for definition.
rebuild
An operation to reconstruct data after the problem that caused a physical drive to
become defunct has been resolved.
rebuild rate
The speed (high, medium, or low) at which a rebuild operation will occur.
rebuilding
The state of a physical drive undergoing a rebuild operation.
recurring task
A scheduled task that runs periodically according to the interval you choose: the
same time each day, each week, or each month.
ROM Update wizard
A program that updates the BIOS and firmware codes on ServeRAID controller.
S
ServeRAID Manager Mini-configuration program
A program that allows the user to display the ServeRAID controller settings, and
to perform a limited set of configuration functions without using the IBM
ServeRAID Support CD.
SAF-TE
A processor that manages small computer system interface (SCSI) accessed
fault-tolerant enclosures (SAF-TE). An example of such an enclosure is the IBM
Netfinity EXP15.
scheduled task
A technique that allows you to start a lengthy operation at a convenient time, such
as a logical drive migration or synchronizing a logical drive.
270 ServeRAID Manager Installation and User's Guide