[Networker] SCSI Bus Resets : Filling Tapes Prematurley

Does anyone know how to block SCSI bus resets in MS windows 2003 environment?

I am using Networker with the following configuration

[1] One N/W server 7.3.3 : Windows 2003 server
[2] Three N/W storage nodes : Win 2003 servers in a cluster

The N/W server and all the three storage nodes have 2 Qlogic 2460 HBAs
( STORMiniport driver V 9.1.7.16 and Microsoft Q943545 hotfix installed )

Also they are connected to ClARiiON CX3-80 storage array and ML6000 tape 
library having 4 IBm LTO-3 tape drives.

In NMC I have found few tapes  being marked as "FULL" before reaching the total 
capacity.

CX3-80 ( 4 FC ports / SP )
A0,A1,A2,A3 for SP-A
B0,B1,B2,B3 for SP-B

ML6000 has 4 ports ( T1,T2,T3,T4)

There are 2 Brocade FC switches with the folllowing zoning config.

                                      FC SWITCH # 1 

[1] Backup_Zone1
Members : N/W server HBA 1; A0; B1; T1; T2

[2] Backup_Zone2
Members: N/W storage node(1) HBA 1; A0; B1; T1; T2

[3] Backup_Zone3
Members: N/W storage node(2) HBA 1; A0; B1; T1; T2

[4] Backup_Zone4
Members: N/W storage node(3) HBA 1; A0; B1; T1; T2

                              
                                FC SWITCH # 2 

[1] Backup_Zone1
Members : N/W server HBA 2; A1; B0; T3; T4

[2] Backup_Zone2
Members: N/W storage node(1) HBA 2; A1; B0; T3; T4

[3] Backup_Zone3
Members: N/W storage node(2) HBA 2; A1; B0; T3; T4

[4] Backup_Zone4
Members: N/W storage node(3) HBA 2; A1; B0; T3; T4

I read that tape drives shared by multiple computers experience unpredictable 
bus resets.

what should i do to resolve this issue?

Thanks

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