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service request number. A number that helps
you to identify the cause of a problem, the failing
field-replaceable units (FRUs), and the service
actions that might be needed to solve the
problem. Service request numbers are generated
by the system error-log analysis, system
configuration code, and customer problem
determination procedures.
SMIT. System management interface tool.
SRN. Service request number.
SSA. Serial Storage Architecture.
SSA unique ID. The specific identifier for a
particular SSA device. Each SSA device has a
specific identifier that is not used by any other
SSA device in the whole world.
stretch. A set of stripes that is used to perform a
particular level of array management.
strip. The maximum amount of contiguous user
data that is mapped to one component.
stripe. A set of strips (with their mirrors) that
have corresponding LBAs on each component.
system disk. A disk that is owned by the using
system; that is, it does not belong to an array, and
it is not a hot spare disk.
U
unconfigure. (a) To take a device from the
available (configured) state to the defined state.
(b) To take out of use by the existing computer
system.
uncouple. To separate the copy array from the
parent RAID-1 or RAID-10 array. The metadata of
the copy array is updated to show that it is no
longer part of the parent RAID array. The
metadata of the parent array is updated to show
that it is no longer associated with the copy array.
The copy array is brought online and becomes
available as a free resource.
unrecoverable error. An error for which
recovery is impossible without the use of recovery
methods that are outside the normal computer
programs.
user mode. In the operating system, a mode in
which a process is run in the user’s program
rather than in the kernel.
V
vary off. To make a device, control unit, or line
not available for its normal intended use.
vary on. To make a device, control unit, or line
available for its normal intended use.
vital product data (VPD). In the operating
system, information that uniquely defines system,
hardware, software, and microcode elements of a
processing system.
VPD. Vital product data.
492 User’s Guide and Maintenance Information
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