Fea tu re D es cri pt io ns
Maxtor Atlas 10K III 6-13
This is a n open- loop method of c ompensating for some of t he sig na l l oss that i s most
sev e re on th e fi rs t p art of a sign al’s transition.
FRC is used to improve integrity of the clock signal by removing inter-symbol
inter ference (ISI). By having a clock r unning at a constant neutralized. The free
running clock is restricted for use with DT information unit transfers at 320 megabytes
per second.
Skew c ompensation of data signals relative to the clock signal; an Ultra320 SCSI
device can establish skew compensation simulta-neously for each of the received
transitions on the data lines so that they occur at the correct time relative to the clock.
IUT ( o r “IU Transfers,” also known as “pa cketized transfers”) is a method to
encapsulate non-data information (like commands sent from the initiator to the target
and status sent from the target to the initiator) into packets and trans fer those packets
at th e m axi m um neg otiate d d a ta rate of up t o 320 me gab ytes per sec o nd . A m e th o d
to transfer packets for a number of I/O processes without an intervening physical
disconnection. A method to minimize overhead by eliminating several bus phase
ch an ge s p e r I/ O proce s s.
The Maxtor Atlas 10K III SCA low voltage differential (LVD) disk drives are designed
for use in “Hot Swap” applications within a properly designed and configured SCSI
system. With care, system integrators can design storage arrays and/or SCSI buses
using Maxtor Atlas 10K II I disk drives that are “Hot Swap Case 4" tolerant.
Case 4 is defined as fo llows:
•Devices are powered and the bus may have active I/O processes
ongoing, but the device being removed or inserted must be idle (no
ongoing I/O processes during the insertion/removal).
•Ground connections to the drive must be made and maintained for 1
millisecond before , during, and 1 millisecond after the insertion/
removal. The SCA-2 c onne ct or used on the Maxt or At l as 1 0K III disk
drive meets this requirement.
•Device ci rcuit ry connec ted t o bus pi ns must remain “glitch” free during
power up or power down.
Note: In a multimode environment, any insertion or removal that
chan ges the bus mode causes a transc eiver mo de chan ge reset
event.