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vgextend error - too many links

 
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mjos
Super Advisor

Re: vgextend error - too many links

I am not getting you Torsten.
Does that mean I can add only upto 7 alternate links to the VG & not all of the disks. Also can you please tell me what does optimize & nonoptimized mean.
Shall i add all the optimize disks or non optimize disks as the alternate links.
I am new to this - thanks
Torsten.
Acclaimed Contributor

Re: vgextend error - too many links

Yes, 1 primary and up to 7 alternate links.


You can see always optimized for Controller B, non-opt. for controller A.


This simply means EVA controller B "owns" the lun and has optimal access to the lun.

Of course you need to have pathes to controller A *AND* B.


I don't no anything about your hardware layout, so I cannot suggest details.

Hope this helps!
Regards
Torsten.

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mjos
Super Advisor

Re: vgextend error - too many links

Thanks Torsten,

ia64 hp server BL860c running B.11.23

One more question - Which disk I have to add as alternate links. Optimized or NonOptimized
Torsten.
Acclaimed Contributor

Re: vgextend error - too many links

Please post the output of

# ioscan -fn

for more details.

Hope this helps!
Regards
Torsten.

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Torsten.
Acclaimed Contributor

Re: vgextend error - too many links

Keep this in mind:

To get access to the LUN you need 1 link only.

All other links are for redundancy if the first link fails.

Now the question is - how much redundancy do you have / do you want?

The FC HBA (or mezzanine in your Blade) has 2 ports hard-wired directly to at least 1 switch - how many switches do you have in the C7000 enclosure?

What EVA model? How many links (or cables) from EVA to the switch or switches?

Hope this helps!
Regards
Torsten.

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mjos
Super Advisor

Re: vgextend error - too many links

Attached ioscan output.
EVA model is 6110
Torsten.
Acclaimed Contributor

Re: vgextend error - too many links

The is an EVA model 6000 and 6100, but no 6110.
But there is a firmware version 6110.

Can you check this again?



And:


Please check and confirm if the vDISK presentation setting is "HP-UX" on the EVA - nothing else (not "default" or "windows" ...).

Hope this helps!
Regards
Torsten.

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mjos
Super Advisor

Re: vgextend error - too many links

Yes EVA is 6100 & vdisk presentation is hp-ux
Torsten.
Acclaimed Contributor

Re: vgextend error - too many links

Let's read your ioscan:

fc 0 0/4/0/0/0/0 fcd CLAIMED INTERFACE HP 4Gb Dual Port PCIe Fibre Channel Mezzanine (FC Port 1)
/dev/fcd0

fc 1 0/4/0/0/0/1 fcd CLAIMED INTERFACE HP 4Gb Dual Port PCIe Fibre Channel Mezzanine (FC Port 2)
/dev/fcd1


this is the 2-port mezzanine card where the eva is connected.




fc 2 0/5/0/0/0/0 fcd CLAIMED INTERFACE HP 4Gb Dual Port PCIe Fibre Channel Mezzanine (FC Port 1)
/dev/fcd2
fc 3 0/5/0/0/0/1 fcd CLAIMED INTERFACE HP 4Gb Dual Port PCIe Fibre Channel Mezzanine (FC Port 2)
/dev/fcd3

This is an "empty" HBA.



From the first port of the HBA:

disk 5 0/4/0/0/0/0.12.0.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c1t0d1 /dev/rdsk/c1t0d1

disk 7 0/4/0/0/0/0.12.1.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c3t0d1 /dev/rdsk/c3t0d1

disk 11 0/4/0/0/0/0.12.2.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c5t0d1 /dev/rdsk/c5t0d1

disk 1 0/4/0/0/0/0.12.3.0.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c7t0d1 /dev/rdsk/c7t0d1




Hmm, the EVA 6000 has only 4 hosts ports, but you see *all* 4 over each HBA port - that indicates to me there is no zoning configured to the switches.


Ask your SAN support people to zone each HBA port and a single controller together.

Example:
zone1
HBA port1 + EVA ctrlA
zone2:
HBA port2 + EVA ctrlB



This will reduce the amount of device files.



Regarding this style of device files:

disk 4 0/4/0/0/0/0.12.0.255.0.0.1 sdisk CLAIMED DEVICE HP HSV210
/dev/dsk/c2t0d1 /dev/rdsk/c2t0d1


(notice the "255") - this let me thing the vdisk presentation mode is NOT "hpux".

I may be wrong, but better to double check this.

Hope this helps!
Regards
Torsten.

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Torsten.
Acclaimed Contributor
Solution

Re: vgextend error - too many links

A correction regarding the zoning:
zone1
HBA port1 + EVActrlA port1 + EVActrlB port1

zone2
HBA port2 + EVActrlA port2 + EVActrlB port2

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
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