[Info-vax] Reconfiguring VMS 6.2 - Shadow set question

[Phillip Helbig---undress to reply]

In article <k648d0$l7i$3 at tdi.cu.mi.it>, supervinx <nessuno at libero.it>
writes: 

> >> > $ mount dsa0: /shadow=($1$dka100:,$1$dka200 /system  V47701_sys
> > 
> > If it really is the system disk, you shouldn't have this command as part
> > of the startup.  Use such a command ONCE to create a shadow set, then
> > put both physical devices into the boot-device console variable.  When
> > you specify a device at boot, specify just one.  (Having the list
> > enables an automatic boot if one member doesn't work, resulting in a
> > one-member shadow set (assuming you have 2 altogether).)  The shadow set
> > will be formed very early in the boot sequence.  Think about it:
> > normally you don't MOUNT the system disk, since it is already known from
> > the boot; same with a shadow set as the system disk.
> 
> You mean I can remove safely this line from the customized startup file ?

IF it is the system disk, THEN it is already mounted by the time the 
startup stuff is run, so there is no need to mount it again.  Yes, it is 
possible to mount a system-disk shadow set later and add an additional 
member, but this will result in a full copy each time, which is not what 
you want.