DS4800存储B控无法连接，所有光口均不亮，SM中显示状态offline

各位：
      请看一下能否确定是B控制器挂了？需要更换？
cache电池确定没有电了。是否有关系？我个人觉得好像没有关系吧
请帮忙诊断一下。
日志中信息如下：
Event type: 6107
Event category: Failure
Priority: Critical
Description: This controller's alternate is non-functional and is being held in reset
Event specific codes: 0/0/0
Component type: Controller
Component location: Controller in slot B
Logged by: Controller in slot A
Raw data:
4d 45 4c 48 02 00 00 00 99 25 00 00 00 00 00 00
07 61 28 c1 2f 46 15 4e 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 02 00 00 00
08 00 00 00 08 00 00 00 ff ff ff ff 01 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00