The FC-PH standard defines three time-out values used for error detection and recovery in Fibre Channel protocol.
E_D_TOV stands for Error Detect TimeOut Value. This is the basic error timeout used for all Fibre Channel error detection. Its default value is 2 seconds.
R_A_TOV stands for Resource Allocation TimeOut Value. This is the amount of time given to devices to allocate the resources needed to process received frames. In practice this may be the time for re-calculation of routing tables in network devices. Its default value is 10 seconds.
R_T_TOV stands for Receiver-Transmitter TimeOut Value. This is the amount of time that the receiver logic uses to determine loss of sync on the wire. Its default value is 100 milliseconds, but can be changed to 100 microseconds.
All devices must use the default values until they have established different values (if they desire) with other devices, usually specified during the login procedure.
Famous quotes containing the words fibre, channel and/or values:
“I see now our fireside formed into a groupe, no one member of which has a fibre in their composition which can ever produce any jarring or jealousies among us. No irregular passions, no dangerous bias, which may render problematical the future fortunes and happiness of our descendants.”
—Thomas Jefferson (1743–1826)
“Eddie did not die. He is no longer on Channel 4, and our sets are tuned to Channel 4; he’s on Channel 7, but he’s still broadcasting. Physical incarnation is highly overrated; it is one corner of universal possibility.”
—Marianne Williamson (b. 1953)
“I describe family values as responsibility towards others, increase of tolerance, compromise, support, flexibility. And essentially the things I call the silent song of life—the continuous process of mutual accommodation without which life is impossible.”
—Salvador Minuchin (20th century)