EMC阵列Dirty-Cache清除及EMCRemote安装配置

1、EMC阵列Dirty Cache清除及EMCRemote安装配置适用环境： FC4700，CLARiiON CX200，CLARiiON CX400， CLARiiON CX600，prior to and including release11(02.04.x)EMC dirty cache故障出现原因及现象：正常情况下，当阵列系统关机或断电时，Write Cache内的数据会在SPS供电的时间内保存至Vault Disk中，而此时若SPS有故障或者其他原因导致该数据保存过程无法实现时，此时阵列的LUN可能会因变成Unowned状态，而导致主机无法识别到盘阵空间。报错信息如下：Enclosu

2、re 0 Disk 5 0x90a (Can't Assign - Cache Dirty) 0 0xafb40 0x14362c故障清除方法： 1.运行EMCRemote（其安装及配置在后文中有描述）连接到要清除dirty cache的LUNdefault owner所在的控制器中。 2.双击运行桌面中CMD,打开dos窗口，在c:提示符下输入admintool.exe回车显示如下主菜单： = Main Menu = 0: Exit 1: Test 2: Recovery 选择2：进入recovery目录如下：= Recovery Menu = 0: Exit 1: Clear Tr

3、ansactLog 2: Fix up Transaction 3: Test Layered Driver 4: Scrub lu 5: SP Control 6: Fix Device Map (N/A) 7: Clear Cache Dirty LU 8. Make Flare LUN Public Selection0:选择7. Clear Cache Dirty LU 显示提示如下The Cache Dirty flag on the indicated LUN is cleared, and the LUN is assigned to the current SP. In a d

4、ual SP environment, this parameter will only be accepted on the SP that is the default owner of the LUN. The LUN will then be available, but will contain inconsistent data. Some data blocks that have been acknowledged to the host have having been written will in face be unmodified. It is the custome

5、r's responsibility to perform whatever data recovery or repair operations are needed by the customer's application. Enter passcode: 输入密码：0x7476，系统会列出发生dirty cache的lun的列表，此处是flare中的lun号，与navisphere中略有区别，是以3位来表示的，如navisphere中lun3此处显示003，具体输出显示如下：The following LUNs are marked as unassigned. Thi

6、s CAN be an indication that they are in a Cache Dirty state. 003 004 Enter LU number to clear, or 'x' to quit选择对应LUN号 003， 显示如下: Clear Cache Dirty bits on 3? <Yy/Nn> n Enter Y for yes to Clear, you will see; Clear Cache Dirty SUCCEDED for lu 3 The following LUNs are marked as unassigne

7、d. This can indicate that they are in a Cache Dirty state. 003 004 Enter LU number to clear, or 'x' to quit:若有多个dirty cache重复此操作，正常情况下当下一个lun clear完成或输入x选项退出admintool工具重新进入后，lun会自动回到default owner控制之下。若清除未能完成，则需要在连接了所属控制器的EMCremote中，进入fcli，使用cld命令清除write cache，也可在Navisphere中将使write cache 处于di

8、sable状态，此时再使用admintool清除即可。注1：此处的write cache是目标LUN的，并不是整个存储阵列的，另外操作完成后要确保cache都已恢复enable状态。注2：该操作虽然正常不会导致整个LUN数据的丢失，但write cache内数据因被清除无法找回来，所以操作前需要跟客户讲明白，得到许可后才可操作。EMCRemote安装及配置：1. 先运行vcredist_x86.exe，安装Visual C+ Runtime Libraries。 选是后自动安装，完成后窗口会自动关闭。2. 运行安装sr_tpm_full.exe，过程中需要输入License 及密码raii，其他基本上保留默认配置即可，具体过程如下：解压文件后输入密码EMC按照默认设置一直选NEXT安装即可3.安装完成初次运行需要做一些配置输入密码raii选OK，后进入如下界面，选next 输入连接描述输入用户名密码：LogID:clariionPassword:clario