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тАО08-24-2003 10:02 PM
тАО08-24-2003 10:02 PM
We have two L1000 hosts with two LVD SCSI on each.
Also we have two SC10 boxes with two BCC's on each. SC10 disks used for Oracle data.
What the best way to connect them to make the most high availability system?
Thank you.
Solved! Go to Solution.
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тАО08-25-2003 05:21 AM
тАО08-25-2003 05:21 AM
Re: Help with SC10 connection
you could set the SC10s in full bus mode (DIP switch setting see manual) and connect each SC10 to a SCSI card, which requires that you change the initiator target id from 7 (default) to 6 for two of the cards.
(need to reboot change at BCH in service menu with scsi command)
Then each L1000 would see all the disks in both SC10 and you could mirror from one SC10 onto the other using PVG-strict mirroring.
That would be a typical config for use in MC/SG. assume you plan to setup a cluster?
Regards,
Bernhard
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тАО08-25-2003 10:04 PM
тАО08-25-2003 10:04 PM
Re: Help with SC10 connection
Hi,
No, not using MC/SG at the moment.
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тАО08-25-2003 10:05 PM
тАО08-25-2003 10:05 PM
Re: Help with SC10 connection
Hi,
No, not using MC/SG at the moment.
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тАО08-25-2003 11:35 PM
тАО08-25-2003 11:35 PM
Re: Help with SC10 connection
This will isolate half of the disks to either and half to the other BCC.
Otherwise you could mount and damage the other servers disks/data!
Cheers
Peter
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тАО08-25-2003 11:38 PM
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тАО08-26-2003 02:27 AM
тАО08-26-2003 02:27 AM
Re: Help with SC10 connection
But before mounting disks, it's
necessary to create logical volumes at first.
So, maybe it's not so big thread for
corrupting volumes already mounted on the
other server?
Or it's something else?
Thank you.
Arturas
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тАО08-26-2003 03:10 AM
тАО08-26-2003 03:10 AM
Re: Help with SC10 connection
You can also import the logical volumes of the other instance.
This is exactly what ServiceGuard does if it takes over. But in addition ServiceGuard acts as an arbitrator to only allow one server to access the volumes at a time!
So you can run without seperating the disks but you are prone to human errors.
Cheers
Peter
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тАО08-26-2003 03:19 AM
тАО08-26-2003 03:19 AM
Re: Help with SC10 connection
What impact ServiceGuard does on performance of such system?
Is it significant?
Thank you.
Art??ras
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тАО08-26-2003 03:21 AM
тАО08-26-2003 03:21 AM
Re: Help with SC10 connection
What differences are in performance to
compare SC10 split and full bus modes
(as shown in attachments).