IBM AS/400e, Руководство пользователя

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PCI Card Placement Rules
298
AS/400e System Handbook
• Two #4838 PCI 100/10 Mbps Ethernet IOAs (provides attachment to 100 Mbps
Ethernet segments)
• Two #2749 Ultra Magnetic Media IOAs (provides attachment of the 7208-342 tape
units and the Alt-IPL device)
After reviewing the above list and counting the IOAs (there are fourteen), we can see that at
least two additional IOPs are required since an IOP can only support a maximum of four
IOAs. The two additional IOPs, when combined with the embedded and base IOPs, will
support a theoretical maximum of sixteen IOAs. Looking at the configuration a little closer
shows that there are two #4838 100/10 Mbps Ethernet Adapters included. There is a soft rule
on page 292 that recommends a separate IOP for each #4838 to achieve optimum
performance. Since we want one #4838 at best performance, we add one more IOP to the
order. If three #2843 IOPs are added instead of two, giving a total of five IOPs when
combined with the embedded and base IOPs, an even distribution of the IOAs is
accomplished at a minimal cost.
Once we have the IOPs and IOAs identified, we can validate the configuration using the
procedure from page 284 as shown below.
The Embedded MFIOP in the Model 820 is examined first:
1. Identify the IOP being considered.
The Embedded MFIOP is to be used.
2. Determine the capacity values for the selected IOP using “IOP Capacity Table” on
page 285. Enter the values on line 6 of the Configuration Validation Form.
The Embedded MFIOP has a memory capacity value of 100 and a performance capacity
value of 100. Those values are entered on line 6.
3. Identify the IOAs to be controlled by the selected IOP.
The #9771, #4745, #4748, and #2749 will be controlled by the Embedded MFIOP. This is
due to the rule concerning card placement when a Twinaxial Console is requested (#18
on page 288) and the requirement for placement of the Alternate-IPL device (#13 on page
287).
4. Determine the capacity requirements of the selected IOAs using “Hard Rules: IOA
Capabilities” on page 286. Enter the values in the form below on lines 1 through 4, one
IOA per line. Remember that an IOP supports a maximum of four IOAs.
The appropriate values were entered on lines 1 through 4. The slots that the cards will
occupy have also been entered.
5. Review “Soft Rules: IOA Requirements” on page 289. If any of the restrictions described
apply to the selected IOAs, use the values from the table to replace the values in the
Configuration Validation Form unless the value in a particular column is less than the