IBM 86655RY - Netfinity 7600 - 8665 Hardware Maintenance Manual page 224

synchronization
SYS
TAP
throughput
toggle To switch between two modes.
WB
write-back
write operation
write policy
WT
write-through
214
Hardware Maintenance Manual: Netfinity 7600 – Type 8665 Models 1RY, 2RY
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.
System.
Tape.
A measure of the amount of work performed by a computer system over a
period of time, for example, number of jobs per day.
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.
An output operation that sends a processed record to an output device or an
output file.
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).
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.