7031-D24 | 24 | 24 | 24 |
7031-T24 | 24 | 24 | 24 |
7214-1U2 | 1 | 1 | 6 |
7314-G30 | 8 | 8 | 8 |
I/O drawers are connected to the adapters in the CEC with the following cables:
•Data transfer cables:
–12X DDR cables for the feature 5802 and 5877 I/O drawers
–12X SDR or DDR cables for the feature 5796 and 7314-G30 I/O drawers
•Power control cables
12X I/O drawer cable connections are always made in loops to help protect against a single point-of-failure resulting from an open, missing, or disconnected cable. A system with nonlooped configurations could experience degraded performance and serviceability. If a nonloop connection is detected, a problem is reported.
The first 12X I/O drawer attached in any I/O drawer loop requires two data transfer cables. Each additional drawer in the loop (up to the maximum allowed) requires one additional data transfer cable.
The first 12X I/O drawer attached to a system unit requires two power control cables. Each additional I/O drawer added to a system requires one additional power control cable. Each system has one power control loop. All I/O drawers attached to a system are included in the same power control loop. Power control cable loops are different in this regard from data transfer cable loops.
Dual-Port 12X Adapter Options
Dual-Port 12X Channel Attach Adapter (#6446): Use the short run adapter for feature 5796 or 7314-G30 expansion I/O drawers located in close proximity to the host system or to other drawers in the I/O expansion loop. This adapter does not include signal repeaters.
Dual-Port 12X Channel Attach Adapter (#6457): Use the long run adapter for feature 5796 or 7314-G30 expansion I/O drawers located farther from the host system or other I/O drawers in the I/O expansion loop. This adapter includes signal repeaters to accommodate the longer cable lengths.
12X Cable Choice
Each feature 5796 or 7314-G30 12X drawer requires one Dual-Port 12X Channel Adapter, either Short Run (#6446) or Long Run (#6457). The choice of adapters is dependent on the distance to the next 12X Channel connection in the loop, either to another I/O drawer or the system unit. The following table identifies the supported cable lengths for each 12X Channel adapter. I/O drawers containing the Short Run adapter can be mixed in a single loop with I/O drawers containing the Long Run adapter. In this table, a "Yes" indicates that the 12X cable identified in that column can be used to connect the drawer configuration identified to the left. A "No" means it cannot be used. The 12X DDR or SDR cables can be used with the feature 5796 or 7314-G30.
| | | 12X Cable Options | |
| | 0.6 M | 1.5 M | 3.0 M | 8.0 M |
| | (#1829)(1)(#1830)(1)(#1840)(2) | (#1834)(3) |
12X | DDR | (#1861)(1)(#1862)(1)(#1865)(2) | (#1864)(3) |
5796 to 5796 | w/12X | | | | |
Short Run adapter | | | | |
(#6446) in both | | | | |
drawers | | Yes | Yes | No | No |
5796 w/ 12X Short Run adapter (#6446)
