EricvanLoon
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Hi everybody,
I'm using a TS4300 with 10 drives. On the TS4300, I defined a control path for all drives.
The SP server is equipped with two dual-port HBA's. One port per HBA is used for disk, the other two are used for tape. Each HBA is connected to a different fabric (Fabric0 and Fabric1). The drives themselves are connected with one port only. Currently, I use point-to-point zoning, so each drive can be accessed through one HBA, all even drives on HBA1, all odd drives on HBA2.
I have been reading through the TS4300 manual and I think my zoning is not optimal. Since I have only one cable per drive connected, I know I can't use data path failover. But I should be able to use control path failover and dynamic load balancing. I did add
I thinks this might be related to my zoning. How do you guys zone your tape drives?
Thanks for any help in advance!
Kind regards,
Eric van Loon
I'm using a TS4300 with 10 drives. On the TS4300, I defined a control path for all drives.
The SP server is equipped with two dual-port HBA's. One port per HBA is used for disk, the other two are used for tape. Each HBA is connected to a different fabric (Fabric0 and Fabric1). The drives themselves are connected with one port only. Currently, I use point-to-point zoning, so each drive can be accessed through one HBA, all even drives on HBA1, all odd drives on HBA2.
I have been reading through the TS4300 manual and I think my zoning is not optimal. Since I have only one cable per drive connected, I know I can't use data path failover. But I should be able to use control path failover and dynamic load balancing. I did add
options lin_tape alternate_pathing=1
to the /etc/modprobe.d/lin_tape.conf
, but a cat /proc/scsi/IBM*
still shows NA
in the FO Path
column, which indicates that a failover path is not available.I thinks this might be related to my zoning. How do you guys zone your tape drives?
Thanks for any help in advance!
Kind regards,
Eric van Loon