IBM 86655RY - Netfinity 7600 - 8665, Hardware Maintenance Manual

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Hardware Maintenance Manual: Netfinity 7600 – Type 8665 Models 1RY, 2RY
synchronization
The process that reads all the data bits of the entire logical drive, calculates
the parity bit for the data, compares the calculated parity with the existing
parity, and updates the existing parity if inconsistent.
SYS System.
TAP Tape.
throughput
A measure of the amount of work performed by a computer system over a
period of time, for example, number of jobs per day.
toggle To switch between two modes.
WB Write-back.
write-back
WB.
The write policy mode that sends a completion status to the system when the
data is entered into memory.
Compare with write-through.
write operation
An output operation that sends a processed record to an output device or an
output file.
write policy
The mode set by the system controller that determines when the completion
status is sent to the system; it can be either when the data is written to the
hard disk (write-through mode) or when the data is entered into memory
(write-back mode).
WT Write-through.
write-through
WT.
The write policy mode that sends a completion status to the system when the
data is written to the device.
Compare with write-back.