powerha6.1sp5切换慢问题，请教～！

环境：
2台p710（A机、B机），存储ds5020，磁盘心跳
powerha6.1 sp5（最新补丁）
aix 6100-06--05（最新的）
en0+en3 etherchannel成en8  bootip1
en1+en4 etherchannel成en9  bootip2
A机上跑oracle（数据在存储上），B机上跑was（was安装在存储上），互备
现象：
正常的手动切换，比如move资源组或者关闭一台机器上的hacmp使资源组切换都很正常，速度比较快。
但是当我将一台机器的网线全部拔掉后，比如说将B机的4根网线依次拔掉后（一根一根慢慢拔），was资源组切换到A机花了10多分钟。看了看hacmp.out没有明显的报错信息，磁盘心跳一直是up状态，不知为何，求高人指点！！
谢谢！
HACMP Event Summary
Event: TE_RG_MOVE
Start time: Thu Aug  4 14:01:34 2011

End time: Thu Aug  4 14:13:39 2011

Action:        Resource:            Script Name:
----------------------------------------------------------------------------
Acquiring resource group:    wasrg    node_up_local
Search on: Thu.Aug.4.14:13:31.GMT+08:00.2011.node_up_local.wasrg.ref
Acquiring resource:    All_service_addrs    acquire_service_addr
Search on: Thu.Aug.4.14:13:31.GMT+08:00.2011.acquire_service_addr.All_service_addrs.wasrg.ref
Resource online:    All_nonerror_service_addrs    acquire_service_addr
Search on: Thu.Aug.4.14:13:33.GMT+08:00.2011.acquire_service_addr.All_nonerror_service_addrs.wasrg.ref
Acquiring resource:    All_volume_groups    cl_activate_vgs
Search on: Thu.Aug.4.14:13:34.GMT+08:00.2011.cl_activate_vgs.All_volume_groups.wasrg.ref
Resource online:    All_nonerror_volume_groups    cl_activate_vgs
Search on: Thu.Aug.4.14:13:36.GMT+08:00.2011.cl_activate_vgs.All_nonerror_volume_groups.wasrg.ref
Acquiring resource:    All_filesystems    cl_activate_fs
Search on: Thu.Aug.4.14:13:36.GMT+08:00.2011.cl_activate_fs.All_filesystems.wasrg.ref
Resource online:    All_non_error_filesystems    cl_activate_fs
Search on: Thu.Aug.4.14:13:37.GMT+08:00.2011.cl_activate_fs.All_non_error_filesystems.wasrg.ref
Acquiring resource:    All_servers    start_server
Search on: Thu.Aug.4.14:13:38.GMT+08:00.2011.start_server.All_servers.wasrg.ref
Resource online:    All_nonerror_servers    start_server
Search on: Thu.Aug.4.14:13:38.GMT+08:00.2011.start_server.All_nonerror_servers.wasrg.ref
Resource group online:    wasrg    node_up_local_complete
Search on: Thu.Aug.4.14:13:38.GMT+08:00.2011.node_up_local_complete.wasrg.ref
---------------------------------------------------------------------------

每次要拔网线测的时候给我感觉总是很恐怖.

设reserve_lock