请教各位一个问题：最近要给客户一台S85(P680)安装AIX 5.3，看了官方上的文档，firmware需要升级到至少20040716，客户现在跑的4.3操作系统.看了一下firmware下载出的DESC，有几个疑问：
1.升级前执行:
lscfg -vp | grep -p alterable
This command will produce a system configuration report similar to the following.
System Firmware VPD:
ROM Level.(alterable).......20030731 (B) 20030731 (A) <= System FW levels
Version.....................RS6K
System Info Specific.(YL)...U0.1-P1-X1
Physical Location: U0.1-P1-X1/Y1
Service Processor Firmware VPD:
ROM Level.(alterable).......20030731 (B) 20030731 (A)
Version.....................RS6K
System Info Specific.(YL)...U0.1-P1-X1/Y2
Physical Location: U0.1-P1-X1/Y2
按照我的理解这里的A与B，应该类似于P5系列用lsmcode所看出的临时和永久firmware,但我想知道这里的A与B，哪一个是临时启动所用的，哪一个是永久的？
如果没有执行Promot操作的话，如何用原先的那个永久的回退到升级前状态，如何操作？
升级完之后，如果再次执行lscfg -vp | grep -p alterable This command will produce a system configuration report containing sections similar to the following. System Firmware VPD:
ROM Level.(alterable).......20040716 (B) 20030731 (A)
Version.....................RS6K
System Info Specific.(YL)...U0.1-P1-X1/Y1
Physical Location: U0.1-P1-X1/Y1
Service Processor Firmware VPD:
ROM Level.(alterable).......20040628 (B) 20030731 (A)
Version.....................RS6K
System Info Specific.(YL)...U0.1-P1-X1/Y2
Physical Location: U0.1-P1-X1/Y2看上面的结果，应该B是启动所用的，也就是所谓临时的，A是原先永久的。这里如何永久提交临时的firmware?应该是所谓的Promot操作吧。另外我看DESC里面还有几个不解的地方：文档中说到“The server normally runs IPL Type A. New firmware updates are stored in IPL Type B until they are promoted. Once promotion takes place, the two IPL types are identical.”既然说通常用A启动，但是升级后从以上显示来看系统用的是B呀，不知道怎么理解?DESC最后提到执行promot操作时，简单的说到了利用下载的另外一个promote.img 文件，但怎么利用这个文件永久提交临时firmware呀？
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