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RA3600 HPUX 11.31 and EVA440 Disks

 
CJENSEN_1
Regular Advisor

RA3600 HPUX 11.31 and EVA440 Disks

Hello Guru's,
Well I have another disk question. We have two Dual Port Fiber Cards on the RX3600 server. Due to space issues, we only have one of those ports on one of the cards connected to the EVA4400. Of course, we can now go ahead an make our EVA4400 disks, and do the VG creation on Unix. However, the other paths will be added in later. How much work is this to do later? Or, are we better off getting all the paths in place, and then do EVA disk creation, and UX VG creation.
Thanks...colin
10 REPLIES 10
stephen peng
Valued Contributor

Re: RA3600 HPUX 11.31 and EVA440 Disks

I don't consider you need to do much work on os side when you employ other HBA in 11.31, using persistent DSF.
CJENSEN_1
Regular Advisor

Re: RA3600 HPUX 11.31 and EVA440 Disks

I take it the persistent DSF automates the paths (the pvlinks), as opposed to the legacy DSF?
Steven E. Protter
Exalted Contributor

Re: RA3600 HPUX 11.31 and EVA440 Disks

Shalom Colin,

Yes it is easier to handle all paths at the beginning.

However with 11.31 a two step process will not be too difficult.

The built in multi-path for 11.31 should identify the disks and take care of alternate path issues with limited admin intervention.

SEP
Steven E Protter
Owner of ISN Corporation
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CJENSEN_1
Regular Advisor

Re: RA3600 HPUX 11.31 and EVA440 Disks

Under 11.11, a simple "vgdisplay -v vg##" would show the alternate and primary links. Is there a similar command in 11.31, that would verify that the RX server is seeing all available paths into the EVA? Again, my concern is adding in the fibre connections after the fact.
stephen peng
Valued Contributor

Re: RA3600 HPUX 11.31 and EVA440 Disks

ioscan -m dsf will show you the relationship between P_DSF and L_DSF.
stephen peng
Valued Contributor

Re: RA3600 HPUX 11.31 and EVA440 Disks

furthermore, there should be configuration at EVA4400 to add new HBA WWN to host configuration, but I don't remember how to achive it.
CJENSEN_1
Regular Advisor

Re: RA3600 HPUX 11.31 and EVA440 Disks

1) Yes, there should be configuration to do on the EVA side when a new HBA is added. I always like to reconcile this from UX side of things, to be extra-thorough.
2) Yes, I have used the ioscan -m dsf. It gives a good reconciliation. So I take it that when the second HBA is added, I will see additional information in the ioscan -m dsf. Sorry for the basic question, but I just want to get a head's up for when the disks are added.
Thanks...colin
stephen peng
Valued Contributor

Re: RA3600 HPUX 11.31 and EVA440 Disks

remember creating vg with P_DSF, a little bit annoying,regards.
CJENSEN_1
Regular Advisor

Re: RA3600 HPUX 11.31 and EVA440 Disks

Yes, the newer persistent DSF seems like a great improvement from "hard-coding" in pvlinks. Thanks for your help...colin
CJENSEN_1
Regular Advisor

Re: RA3600 HPUX 11.31 and EVA440 Disks

Thanks.