HPUX : Vgcreation in case of no mapfile.

Vgcreation in case of no mapfile.

Overview

Vgcreatoin in case of no mapfile , but vgheader and lvheader are on disk.

Procedures

1-      Once BCV sync complete or we know the group of disk which are below to same Vg. We can use xd command to find the VGID on DISK. And form a group of disk Here we know  the group of disk. [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# #-> pairdisplay -g DXN_DB -IBC5 -fxcd |grep -i s-vol|grep -i flash DXN_DB  vg_DXN_flashback_000(L)  c158t11d6      0  65760  60c1.S-VOL SSUS,   99    60bd - DXN_DB  vg_DXN_flashback_001(L)  c158t11d7      0  65760  60c2.S-VOL SSUS,   99    60be - DXN_DB  vg_DXN_flashback_002(L)  c158t12d0      0  65760  60c3.S-VOL SSUS,   99    60bf - DXN_DB  vg_DXN_flashback_003(L)  c158t12d1      0  65760  60c4.S-VOL SSUS,   99    60c0 - [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# 2-   Check those disk are part of any VG or present in lvmtab. #-> strings /etc/lvmtab|grep -iE "c158t11d6|c158t11d7|c158t12d0|c158t12d1" [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# #-> ll /dev/*/group|grep -i flas crw-r--r--   1 root       sys         64 0x440000 Aug 27  2013 /dev/vg_DXN_flashback/group [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# 3-   Run vgchgid on set of disk which have same vgid. #-> vgchgid /dev/rdsk/c158t11d6 /dev/rdsk/c158t11d7 /dev/rdsk/c158t12d0 /dev/rdsk/c158t12d1 [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# 4-   Create the directory and provide unique minor number #-> mkdir /dev/vg_DXN_flashback [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# #-> mknod /dev/vg_DXN_flashback/group c 64 0x450000 5-   Import the VG without mapfile [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# #-> vgimport /dev/vg_DXN_flashback /dev/dsk/c158t11d6 /dev/dsk/c158t11d7 /dev/dsk/c158t12d0 /dev/dsk/c158t12d1 Warning: A backup of this volume group may not exist on this machine. Please remember to take a backup using the vgcfgbackup command after activating the volume group. [root@systemA:/usr/local/CPR/data/systemA/2014.04.26-02.00]# 6-   Use the name convention as per FS: #-> cd  /dev/vg_DXN_flashback [root@systemA:/dev/vg_DXN_flashback]# #-> ll total 0 crw-r--r--   1 root       sys         64 0x450000 May  1 08:35 group brw-r-----   1 root       sys         64 0x450001 May  1 08:36 lvol1 crw-r-----   1 root       sys         64 0x450001 May  1 08:36 rlvol1 [root@systemA:/dev/vg_DXN_flashback]# #-> mv lvol1 lv_oracleDXNflashback [root@systemA:/dev/vg_DXN_flashback]# #-> mv rlvol1 rlv_oracleDXNflashback [root@systemA:/dev/vg_DXN_flashback]# #-> cd 7-   Active the VG [root@systemA:/.root]# #-> vgdisplay -v /dev/vg_DXN_flashback |grep -i "lv name" vgdisplay: Volume group not activated. vgdisplay: Cannot display volume group "/dev/vg_DXN_flashback". [root@systemA:/.root]# #-> vgchange -a y /dev/vg_DXN_flashback Activated volume group Volume group "/dev/vg_DXN_flashback" has been successfully changed. [root@systemA:/.root]# #-> vgdisplay -v /dev/vg_DXN_flashback |grep -i "lv name"    LV Name                     /dev/vg_DXN_flashback/lv_oracleDXNflashback 8-   Run fsck on the LV [root@systemA:/.root]# #-> mount /dev/vg_DXN_flashback/lv_oracleDXNflashback /oracle/DXN/flashback vxfs mount: /dev/vg_DXN_flashback/lv_oracleDXNflashback is corrupted. needs checking [root@systemA:/.root]# #-> fsck /dev/vg_DXN_flashback/lv_oracleDXNflashback fsck: /etc/default/fs is used for determining the file system type log replay in progress replay complete - marking super-block as CLEAN 9-   Mount the FS on mount point. [root@systemA:/.root]# #-> mount /dev/vg_DXN_flashback/lv_oracleDXNflashback /oracle/DXN/flashback [root@systemA:/.root]# #-> bdf /oracle/DXN/flashback Filesystem          kbytes    used   avail %used Mounted on /dev/vg_DXN_flashback/lv_oracleDXNflashback                    512000000  227665 479786690    0% /oracle/DXN/flashback

Keywords.

Vgimport, vgchgid, mount,mknod