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Full Discussion: Reuse a LUN
Homework and Emergencies Emergency UNIX and Linux Support Reuse a LUN Post 302687879 by Shirishlnx on Friday 17th of August 2012 07:19:49 AM
Old 08-17-2012
Reuse a LUN
I have a LUN (From HP-Storage VA7110) that is claimed on 2 servers, but is in used in one of the VG on Server-1 .
Now I want to shut Server-1 and re-use that LUN on server-2 .

Code:
Server-1
Path-1 : /dev/rdsk/c4t0d1 
Path-2: /dev/rdsk/c6t0d1

Server-2
Path-1: /dev/rdsk/c5t0d1  
Path-2: /dev/rdsk/c4t0d1

Am new on HP-UX, confused with right steps .

1. Do I need to format LUN: /dev/rdsk/c4t0d1 before reuse with new VG on server-2
2. If need to format, what command I can use safely
3. Also I want alternate path to be available with new VG as well, so is below syntax is right .

On Server-2
Code:
# pvcreate -f /dev/rdsk/c5t0d1
# mkdir /dev/vg05
# mknod /dev/vg05/group c 64 0x050000 
# vgcreate -l 255 -p 32 -s 8 /dev/vg05   /dev/rdsk/c5t0d1   /dev/dsk/c4t0d1
# vgdisplay -v vg05

--Shirish Shukla
Last edited by Shirishlnx; 08-17-2012 at 08:58 AM..
 

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LEARN ABOUT DEBIAN

ql-dynamic-tgt-lun-disc

ql-dynamic-tgt-disc(8)					       System Administration					    ql-dynamic-tgt-disc(8)

NAME

       ql-dynamic-tgt-lun-disc - Scans for newly added LUNs.

SYNOPSIS

       ql-dynamic-tgt-lun-disc [OPTIONS]

DESCRIPTION

       Dynamic TGT-LUN Discovery Utility

       This  utility  scans  for  newly added LUNs. After adding new LUNs, you do not need to unload, then load the QLogic FC driver or reboot the
       system

       To begin scanning the LUNs issue following command:

	      # /usr/sbin/ql-dynamic-tgt-lun-disc

       -al,   --allow-lip
	      LIP is not issued by default, even if it is required for scanning new LUNs Setting this option, allows the utility to issue LIP.

       -cl, --current-luns
	      Displays LUNS currently present

       -e,  --extended-scan
	      Use this option as "-e | --extended-scan". to rescan LUNs. This will identify any change in attributes of existing LUNs. This option
	      can be used in combination of scan/refresh or max luns

       -h,  --help, ?
	      Prints this help message

       -i,  --interactive
	      Use this option to use the menu driven program

       -is,  --iscsi
	      Use this option to operate on ISCSI HBAs, this option can be used in combination of any other supported option.

       -m,  --max-lun
	      To set the maximum LUNs to be scanned

       -p,  --proc
	      Use PROC file system for LUN scanning

       -r,  --refresh
	      To refresh, that is remove LUNs that are lost use the options "-r|--refresh". This will remove the LUNs which no more exist.

       -s,  --scan [ -r|--refresh ]
	      The QLogic LUN scan utility re-scans all the devices connected to the QLogic HBA

SEE ALSO

       ql-lun-state-online(8), ql-hba-snapshot(8), ql-set-cmd-timeout(8)

Matthias Schmitz <;matthias@sigxcpu.org> 			     July 2009						    ql-dynamic-tgt-disc(8)
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