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Problem with MSA1000

ALex Garin_2
Occasional Contributor

Problem with MSA1000

Cluster system based on:
1. MSA 1000 (2xRAID, 2xFC-hubs, 1xDisk Shelf, firmware ver. 5.20)
2. 2xDL360 G4 (2xFC PCI controllers per server)
3. RHEL 3 AS TU3
4. SecurePath 3.0C for Linux + SP2
5. HP ServiceGuard for Linux 11.16

At connection MSA to servers through two hub (second for redundancy), at boot there is a message "No volume group", and the disk array is not connected. At switching-off of one of hubs (any) boot passes normally. In what there can be a problem?