How to Restore a savevg without Preserving Mirrors

Contents

This document describes how to restore a savevg image without preserving mirrors.

Information in this document is valid for AIX Versions 4.1.x and 4.2.x only.

WARNING: This procedure is valid only with a savevg image and will not work with a Sysback 6000 system backup.

If another savevg cannot be run, the following procedure can be used to restore a savevg without mirroring.

All references to the tape device in the next section are as rmt0.

1. On the target system, place the savevg tape in the tape drive.
2. Remove the /tmp/vgdata directory:

                rm -r /tmp/vgdata 

3. Restore the /tmp/vgdata directory from the savevg tape:

               cd /
               restore -xqvdf /dev/rmt0 ./tmp/vgdata                

4. Edit the /tmp/vgdata/<vgname>/<vgname>.data file, and make changes to each of the lv_data stanzas as indicated in the examples that follow. The lines that need changes are marked by a -->. In Example 4, the changes are made to those lines.

   To view and edit the file, using your favorite editor, open /tmp/vgdata/<vgname>/<vgname>.data:

        Example 3
                           lv_data:
                                   VOLUME_GROUP= <vgname>
                                   LV_SOURCE_DISK_LIST=  hdisk1
                                   LV_IDENTIFIER= 00000001113f3c62.5
                                   LOGICAL_VOLUME= lv01
                                   VG_STAT= active/complete
                                   TYPE= jfs
                                   MAX_LPS= 512
                           -->     COPIES = 2
                                   LPs = 120
                                   STALE_PPs= 0
                                   INTER_POLICY= minimum
                                   INTRA_POLICY= center
                                   MOUNT_POINT= /apps2
                                   MIRROR_WRITE_CONSISTENCY= on
                                   LV_SEPARATE_PV= yes
                                   PERMISSION= read/write
                                   LV_STATE= opened/syncd
                                   WRITE_VERIFY= off
                                   PP_SIZE= 4
                                   SCHED_POLICY= parallel
                           -->     PP = 240
                                   BB_POLICY= relocatable
                                   RELOCATABLE= yes
                                   UPPER_BOUND= 32
                                   LABEL= /apps2
                                   MAPFILE=
                                   LV_MIN_LPS= 68
        Example 4
                           lv_data:
                                   VOLUME_GROUP= <vgname>
                                   LV_SOURCE_DISK_LIST=  hdisk0
                                   LV_IDENTIFIER= 00000001113f3c62.5
                                   LOGICAL_VOLUME= lv01
                                   VG_STAT= active/complete
                                   TYPE= jfs
                                   MAX_LPS= 512
                           -->     COPIES = 1
                                   LPs = 120
                                   STALE_PPs= 0
                                   INTER_POLICY= minimum
                                   INTRA_POLICY= center
                                   MOUNT_POINT= /apps2
                                   MIRROR_WRITE_CONSISTENCY= on
                                   LV_SEPARATE_PV= yes
                                   PERMISSION= read/write
                                   LV_STATE= opened/syncd
                                   WRITE_VERIFY= off
                                   PP_SIZE= 4
                                   SCHED_POLICY= parallel
                           -->     PP = 120
                                   BB_POLICY= relocatable
                                   RELOCATABLE= yes
                                   UPPER_BOUND= 32
                                   LABEL= /apps2
                                   MAPFILE=
                                   LV_MIN_LPS= 120
   

   NOTE: In Example 4 the COPIES value has been changed to 1, and the PP value is set equal to the LPs value. Make these changes to each of the lv_data stanzas in the <vgname>.data file. Once you make the changes, save the file and exit.

5. After making the changes to the <vgname>.data file, create a backbyname of /tmp/vgdata to run restvg against.

                cd /
		find ./tmp/vgdata -print |backup -iqvf /tmp/vg.back

This should back up the following files:

                ./tmp/vgdata
		./tmp/vgdata/vgdata.files
		./tmp/vgdata/<vgname> 
		./tmp/vgdata/<vgname>/filesystems
		./tmp/vgdata/<vgname>/<vgname>.data 

<vgname> is the name of your volume group.

6. Verify that the files were backed up, and that the file can be read:

                restore -Tqvf /tmp/vg.back

7. Run the restvg command to recreate the volume group on the hdisks you want:

		restvg -f /tmp/vg.back hdisk# hdisk# 

8. This should complete fairly quickly (depending on how many logical volumes and file systems are being created) and return to the command line. Verify that the volume group and file systems were re-created:

		lsvg -l <vgname>

And verify the file systems mounted:

		mount 

9. If all looks good, restore the files from the tape:

		cd /
		restore -xqvdf /dev/rmt0






[ Doc Ref: 9174565467548     Publish Date: May. 25, 2000     4FAX Ref: 4260 ]