Re: How to make a shadowed system disk
From: Bob Ceculski (bob_at_instantwhip.com)
Date: 05/21/03
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Date: 21 May 2003 10:20:39 -0700
"Scott Greig" <jsgreig@geminaq.com> wrote in message news:<R2Lya.3333$cq1.526543@news20.bellglobal.com>...
> Hello all
>
> A few questions on volume shadowing
>
> 1) I can't seem to find out how to make a shadowed system disk.
>
> Is it as simple as:
>
> $ MCR SYSGEN
> USE CURRENT
> SET SHADOW_SYS_DISK=1
> SET SHADOW_SYS_UNIT= whatever
> WRITE CURRENT
> EXIT
>
> ...and then reboot?
>
> One rebooted, add other volume(s) to the shadow set?
>
> 2) What setting changes (if any) need to be/ can be
> made to the console variable BOOTDEF_DEV?
> Can this variable be a list of members of a shadowset?
>
> TIA
> Scott
$ EDT MODPARAMS.DAT
ALLOCLASS=101
SHADOWING=2
SHADOW_SYS_DISK=1
SHADOW_SYS_UNIT=0
SHADOW_MAX_COPY=2
SHADOW_SYS_TMO=20
then run autogen and reboot. The above configuration is for a
shadow set of 2 disks with "DKA0" being the primary member.
When rebooted, mount the 2nd member with
$ MOUNT/SYSTEM/NOASSIST DSA0:/SHADOW=($101$DKA0,$101$DKA100) SHADOW1
of course you substitute in your allocation class and drive names
accordingly. There is a shadow doc set you can buy when you
purchase a shadow license, which I assume you have. The secondary
member will build with a copy operation, and you can see the
status with "SHOW DEVICE".
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