如何升级双CS的Unified系统微码？

请问各位：

     如何升级双CS的Unified系统微码？我曾经尝试使用USM去连接Primary CS（CS0）去升级双CS的Unified系统。但是在升级的过程当中会报错，不让升级。我使用PG生成升级的文档，稳当没有很详细的说明如何升级双CS系统的VNX OE。

     下面是PG中提到的升级CS1的步骤。

Updating CSI

If you used the Unisphere Service Manager to send the array configuration information after the activity, then it may not be necessary to enter the new information into CSI. However, do confirm that the new information is there; if it is not then you will have to enter it manually.

1. [ ] Verify that the customer information is correct.

In particular, there must be one (and only one) "Primary Contact Of" relationship record, with a telephone number, for any site with dial home enabled systems installed. Without a Primary Contact Of, the dial home process will select a random "Alternate Contact Of" contact, if one exists, possibly delaying contact to the customer. If neither relationship type exists, the SR will be put into an exception process and service will definitely be delayed. Do NOT create an entirely new contact unless you are absolutely sure that there is no appropriate existing contact that can be related to the site. Seek assistance from the CS Help Desk to make the appropriate contact

2. [ ] Record the activity. If any issues arise, contact the CS Help Desk for assistance.

b. Expire the previous version of VNX OE code.

c. Create the new version of VNX OE code.

d. If necessary, update the Remote Connections screen. Note that this step is mandatory to ensure that the correct information is logged in the CSI database.

e. Enter the time spent to complete the upgrade procedure.

     在升级双CS的时候，是否需要先将CS1关机？当升级完CS0后，是否再将CS1启动，CS0关机，这样CS1将变为Primary，再进行一次Unified系统的升级？

     有哪位高人做过这样的实施？