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09-25-2007 09:38 PM
09-25-2007 09:38 PM
I am trying to make a OVMS SCSI Cable Cluster system. Two cluster nodes are Alpha server 4100 and DS-20.
I have attached the the snap for cluster configuration.
I have connected a storage box common to both system, but both the system are not able to read the disk in storage box at the same time.
But if connected one by one both of them can read it.
Can anyone help me what I am doing wrong with the cluster setup.
I am using a 68 pin SCSI cable and every connector is SE.
Regards,
ajaydec
Solved! Go to Solution.
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09-25-2007 10:19 PM
09-25-2007 10:19 PM
Re: OVMS Cluster Config
did you appropriately set the SCSI adapter ID to different values on both Alpha systems ?
Volker.

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09-25-2007 11:08 PM
09-25-2007 11:08 PM
Re: OVMS Cluster Config
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09-25-2007 11:26 PM
09-25-2007 11:26 PM
Re: OVMS Cluster Config
you can check and set the SCSI adapter ID at console level:
>>> show pk*
>>> SET PKx0_HOST_ID n
See Table A6 in the 'Guidelines for OpenVMS Cluster Configurations' manual.
Volker.

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09-25-2007 11:40 PM
09-25-2007 11:40 PM
Re: OVMS Cluster Config
I have set the id of
PKA0_host_id 5
PKB0_host_id 6
PKC0_host_id 8
on Alpha 4100 and
PKA0_host_id 4
PKB0_host_id 7
PKC0_host_id 7
on DS-20 server.
But then also its not working.
Note: I am not able to change host_id of PKB0 and PKC0 on DS-20.
Regards,
ajadec
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09-26-2007 02:00 AM
09-26-2007 02:00 AM
Re: OVMS Cluster Config
Your diagram does not indicate which scsi bus is the shared bus. It also doesn't tell us what model of scsi adapter you are trying to use. The adapters on the shared bus should be either KZPSA or KZPBA. They should also have the terminating resistors removed from those adapters.
Bill
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09-26-2007 02:32 AM
09-26-2007 02:32 AM
Re: OVMS Cluster Config
2. What is the "storage box" ?
3. is there an actual error here ? from console from vms ? can you post it ?
Personally, I can't see this cabling working ? (maybe I'm reading it wrong).
Keep it simple to start with... For example..
4100 PKx HBA connected to a Y cable - one branch connected to terminator (if the HBA doesn't have one ? (KZPBA-CB?)) and the other leading to the DS20, again Y cable into the DS20 HBA with the other end conencting to your storage. One system with a scsi id of 6 and the other 7.
Regards
John.

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09-26-2007 08:44 PM
09-26-2007 08:44 PM
Re: OVMS Cluster Config
4100 PKA SE SCSI cable is connected to a Y cable - one branch connected to SE terminator and the other leading to storage box ( storage box has L shape having two 68 pin connector).
Again, DS-20 PKB SE SCSI cable is connected to a Y cable - one branch connected to SE terminator and the other leading to storage box.
Regards
ajaydec
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09-26-2007 09:13 PM
09-26-2007 09:13 PM
Re: OVMS Cluster Config
>> 2. What is the "storage box" ?
>> 3. is there an actual error here ? from console from vms ? can you post it ?
Cheers
John.

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09-26-2007 09:28 PM
09-26-2007 09:28 PM
Re: OVMS Cluster Config
2) Storage box is SCSI storage box. BA350
3) Actually there are no error on the console. One system is booted properly and when I tried to boot the other system then device goes offline and it again mount it, again it goes offline and again it mounts it... it repeats....
Sometime I also see lot of device at >>> prompt after giving show dev command but I have inserted only one device in storage box.
Regards,
-Nitin
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