cannot find the SAN drive letter in my win2003 server

[samuel mak]

I use MSA1000 and win2003 server. The san and the windows machines were relocated from site A to site B. But after that, in the windows 2003 server, I did not find the drive letter (e.g. G drive) that connected to the SAN disk. But i can see the disk under "my computer -> Manage -> device manager". However, i could not see the disk under "disk management".

And i found that in server A that could see the disk letter of the san disk, it had a device "Multipath" under "Device manager". But in server B that did not see the drive letter, it did not have the multipath device.

Did I setup something wrong ?

[samuel mak]

My two servers are not windows cluster. Instead, they are oracle RAC cluster. I understand that two servers may not be allowed to write to the SAN disk. But oracle could not be started on server B because some files are in SAN disk drive. Does anyone have ideas how to fix it ?