公开(公告)号：GB2357601B

公开(公告)日：2004-03-31

申请号：GB9930284

申请日：1999-12-23

Applicant: IBM

Inventor： BEER REGINALD ,  MADDOCK ROBERT FRANK ,  VEAL MICHAEL

IPC: G06F1/32 ,  G06F1/26

公开(公告)号：GB2378621A

公开(公告)日：2003-02-12

申请号：GB0119069

申请日：2001-08-06

Applicant: IBM

Inventor： CASHMAN PAUL NICHOLAS ,  MADDOCK ROBERT FRANK ,  NICHOLSON ROBERT BRUCE ,  VEAL MICHAEL

IPC: H04L12/437

Abstract: A method and apparatus for improving performance of a loop network (400), in particular a Fibre Channel Arbitrated Loop. The loop network (400) has two loops (406, 408) and a plurality of dual ported devices (410) each with one port (411, 412) on each loop (406, 408) . The method includes selectively bypassing redundant ports on the loops (406, 408) by a first command means in the form of a Fibre Channel Arbitrated Loop command to balance port accesses and to reduce the loop overhead by reducing the number of ports (411, 412) in each loop (406, 408). In the event of a fault, bypassing the port of a device (410) by a second command means in the form of a non Fibre Channel Arbitrated Loop command and enabling all the bypassed redundant ports with a single command to all ports using the first command means. The first command means does not enable the port bypassed by the second command means.

公开(公告)号：GB2357601A

公开(公告)日：2001-06-27

申请号：GB9930284

申请日：1999-12-23

Applicant: IBM

Inventor： BEER REGINALD ,  MADDOCK ROBERT FRANK ,  VEAL MICHAEL

IPC: G06F1/32 ,  G06F1/26

Abstract: Remote power control of devices in a computer system where each device communicates with the next device, in which, if communication from the previous device stops 350 and the device has received a shutdown command 330, the device enters a standby mode, in which, signal activity of its input ports is monitored 370 using a standby power supply, and if a signal resumes at any of its ports which was previously inactive 380 main power is restored to the device 390.

公开(公告)号：GB2378621B

公开(公告)日：2004-11-10

申请号：GB0119069

申请日：2001-08-06

Applicant: IBM

Inventor： CASHMAN PAUL NICHOLAS ,  MADDOCK ROBERT FRANK ,  NICHOLSON ROBERT BRUCE ,  VEAL MICHAEL

IPC: H04L12/437

Abstract: A method and apparatus for improving performance of a loop network, in particular a Fiber Channel Arbitrated Loop. The loop network has two loops and a plurality of dual-ported devices each with one port on each loop. The method includes selectively bypassing redundant ports on the loops by a first command means in the form of a Fiber Channel Arbitrated Loop command to balance port accesses and to reduce the loop overhead by reducing the number of ports in each loop. In the event of a fault, bypassing the port of a device by a second command means in the form of a non Fiber Channel Arbitrated Loop command and enabling all the bypassed redundant ports with a single command to all ports using the first command means. The first command means does not enable the port bypassed by the second command means.