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тАО04-01-2004 02:41 PM
тАО04-01-2004 02:41 PM
CVSDM 1.07
I need to vgextend one of the vg in server2. How can I create a new LUN. CVSDM is only installed in server1. I have two redundancy groups can I use any of the redundancy group
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тАО04-01-2004 03:15 PM
тАО04-01-2004 03:15 PM
Re: CVSDM 1.07
CVSDM need not be installed on all the hosts that are connected to the VA. When you create a LUN on VA from the CVSDM host it will be visible on all other hosts (if you have not set host security).
Yes, you can create the LUN on either RG1 or RG2. However I would suggest you put the new LUN on different RG than the existing disk (LUN) of the VG that you are planning to extend. This will help you in achieving better IO rates and availablity.
-Karthik S S
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тАО04-01-2004 03:16 PM
тАО04-01-2004 03:16 PM
Re: CVSDM 1.07
Just wondering how to check whether I have host security turn on or not.
How can I know the path of the LUN so that I can do the vgextend /dev/myvg path_to_LUN
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тАО04-01-2004 03:40 PM
тАО04-01-2004 03:40 PM
Re: CVSDM 1.07
#armhost -r -f armhost.out array_id
Reading Host Port Behavior entries from the array ...
Writing output file ...100%
Host Port Behavior data has been read
and written to the file : armhost.out
If it is enabled the o/p file will contain entries something like this. (WWN Number - HOST port behaviour format)
#cat armhost.out
50060b000008314f HPUX
50060b00000807b3 WINDOWS
50060b0000080a1b LINUX
50060b00000827a5 HPUX
#
For finding the new LUN:
On the host where you want to extend the VG run,
ioscan -fnC disk
insf -e -C disk
ioscan -fnC disk
will show you all the LUNs including the newly created one. Using the target ID of the LUN you can determine the disk device file.
-Karthik S S
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тАО04-01-2004 04:45 PM
тАО04-01-2004 04:45 PM
Re: CVSDM 1.07
One last thing, If I need to vgextend do I need to umount all current filesystem. I have OnlineJFS installed.
I believe the LUN will have two link, one suppose to be the alternate link. The correct syntax should be
vgextend /dev/myvg path_to_lun alternate_to_lun
Should I put the alternate link of the LUN to my vgextend command
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тАО04-01-2004 04:50 PM
тАО04-01-2004 04:50 PM
Re: CVSDM 1.07
-Karthik S S