[SunHELP] Root Hard Disk Upgrade

[DAUBIGNE Sebastien - BOR ( <SDaubigne at bordeaux-bersol.sema.slb.com> <SDaubigne at bordeaux-bersol.sema.slb.com>]

Actually, you can use vxresize to do this without downtime, but there is a
risk to get an unbootable rootdisk in case of a crash during steps 5-6.
That's why you should keep a safe boot disk without VxVM rootability in such
case (See step 2).
The procedure looks like this :

1.	Initialize the two 72 Gb disks ;add them to rootdg
2.	Break the first 18 gb mirror ; Make it bootable without VxVM
rootability to keep a safe boot disk in case of crash during steps 5-6 (See
crash recovery techniques in Vxvm docs for this procedure : modify system,
vfstab, touch install-db, etc.)
3.	Mirror to the first 72 Gb disk (vxrootmir + vxmirror)
4.	Break the second 18 Gb mirror
5.	Extend root FS (vxresize) on the 72 Gb disk : At this point this
disk is unbootable as the root volume is not contiguous
6.	Mirror to the second 72 Gb mirror (vxrootmir + vxmirror) : This disk
is unencapsulated, contiguous and bootable with VxVM rootability.
7.	Create partitions for swap/var/opt, etc. to the second 72 gb disk as
needed (see Howard/Trantham paper
http://www.sun.com/blueprints/0800/vxvmref.pdf
<http://www.sun.com/blueprints/0800/vxvmref.pdf> )
8.	Break the first 72 Gb mirror
9.	Remirror to the first 72 Gb disk (vxrootmir + vxmirror)
10.	Create partitions for swap/var/opt, etc. to the first 72 gb disk as
needed (see Howard/Trantham paper).
11.	You have now two mirrors that are unencapsulated, contiguous and
bootable with VxVM rootability.


---
Sebastien DAUBIGNE
sdaubigne at bordeaux-bersol.sema.slb.com
<mailto:sdaubigne at bordeaux-bersol.sema.slb.com>  - (+33)5.57.26.56.36
SchlumbergerSema - SGS/DWH/Pessac

-----Message d'origine-----
De:	Patrick Marquetecken [SMTP:patrick.marquetecken at pandora.be]
Date:	mercredi 12 novembre 2003 09:12
@:	The SunHELP List
Objet:	Re: [SunHELP] Root Hard Disk Upgrade

Then the only way is ufsdump

Patrick


Op wo 12-11-2003, om 06:38 schreef BINOY P.V:
> Hi,
>
> yes that is a good idea but the problem is we need to increase the
existing
> root partion size(5gb to 15gb)
>
> thanks and regards
> Binoy
>
>
>
>
> >From: Patrick Marquetecken <patrick.marquetecken at pandora.be>
> >Reply-To: The SunHELP List <sunhelp at sunhelp.org>
> >To: The SunHELP List <sunhelp at sunhelp.org>
> >Subject: Re: [SunHELP] Root Hard Disk Upgrade
> >Date: Tue, 11 Nov 2003 15:15:38 +0100
> >
> >I would disconnect the mirror, install the new 72 disk and mirror again,
> >and do the same for the second disk.
> >
> >Patrick
> >Op di 11-11-2003, om 05:12 schreef BINOY P.V:
> > > Dear All,
> > >
> > > We are planing to upgrade our Root HDD from 18gb to 72gb in our SF4800
> > > Server running Solaris-8, 18GB HDD is mirrored.
> > > Root HDD is under control of Veritas Volume Manger 3.1, can anyone
> >please
> > > guide us which is the easy way of upgrading the HDD without data loss.
> > >
> > > Thanks and regards
> > > Binoy
> > >
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