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Full Discussion: disaster recovery
Top Forums UNIX for Dummies Questions & Answers disaster recovery Post 50930 by RTM on Wednesday 5th of May 2004 03:10:35 PM
Old 05-05-2004
The quick and easy answer to what files and/or other information do I need to keep copies of to sucessfully restore my system from the ground up:

All of them!


Actually, it depends on what you are going to do - and what type of disaster you are looking to recover from.

Scenario 1 - stupid user removes files he/she needed = Recover from backup tapes

Scenario 2 - stupid System Admin removes files the system needed = Recover from backup and/or rebuild server from scratch and add changed system files from backup, rebuild data from backups.

Scenario 3 - server dies - all disks lost = rebuild from scratch - reload system and data files from backup.

Scenario 4 - natural disaster - fire, tornado... = get new hardware, build from scratch, get backups from off-site, restore system and data files.

Realize that the system files you need to restore are the ones you change - stuff like adding new startup scripts that won't be there after you rebuild from scratch (rebuilding from Solaris cd). Changes to /etc/inittab, /etc/services, specialty files such as DiskSuite config files, Veritas vxprint output, Database configuration files, output from df -k command (showing how things were set up as far as mount)... these type things you may not need if all your servers are built the same with NO deviations. Example - all servers built with same OS - patch level the same - no changes to default system - no application DATA on system drives.

The most important thing you should realize - you need to backup the system and data files so you have something if you do have a disaster to rebuild from.

This also goes for upgrades, adding new software - they don't have to complete sucessfully - the only thing that has to work is how you recover from it. That will save your job more than anything.
Last edited by RTM; 05-05-2004 at 04:18 PM..
 

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LEARN ABOUT NETBSD

vgcfgrestore

VGCFGRESTORE(8) 					      System Manager's Manual						   VGCFGRESTORE(8)

NAME

       vgcfgrestore - restore volume group descriptor area

SYNOPSIS

       vgcfgrestore [-d|--debug] [-f|--file filename] [-l[l]|--list] [-h|--help] [-M|--Metadatatype1|2] [-t|--test] [-v|--verbose] VolumeGroupName

DESCRIPTION

       vgcfgrestore  allows  you  to  restore  the metadata of VolumeGroupName from a text backup file produced by vgcfgbackup.  You can specify a
       backup file with --file.  If no backup file is specified, the most recent one is used.  Use --list for a list of the available  backup  and
       archive files of VolumeGroupName.

OPTIONS

       -l | --list -- List files pertaining to VolumeGroupName
	      List  metadata  backup  and  archive  files  pertaining  to VolumeGroupName.  May be used with the -f option.  Does not restore Vol-
	      umeGroupName.

       -f | --file filename -- Name of LVM metadata backup file
	      Specifies a metadata backup or archive file to be used for restoring VolumeGroupName.  Often this file has been created with  vgcfg-
	      backup.

       See lvm for common options.

REPLACING PHYSICAL VOLUMES

       vgdisplay  --partial  --verbose will show you the UUIDs and sizes of any PVs that are no longer present.  If a PV in the VG is lost and you
       wish to substitute another of the same size, use pvcreate --restorefile filename --uuid uuid (plus additional arguments as appropriate)	to
       initialise  it with the same UUID as the missing PV.  Repeat for all other missing PVs in the VG.  Then use vgcfgrestore --file filename to
       restore the volume group's metadata.

SEE ALSO

       lvm(8), vgcreate(8)

Sistina Software UK					 LVM TOOLS 2.02.44-cvs (02-17-09)					   VGCFGRESTORE(8)
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