[Info-vax] INIT/SHADOW

[Michael Moroney]

helbig at astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) writes:

>In article <ijsk9e$mal$1 at pcls6.std.com>, moroney at world.std.spaamtrap.com
>(Michael Moroney) writes: 

>> >  So, in this case, I do INIT/SHADOW on two disks which were not 
>> >previously part of a shadow set, but which have been erased.  There must 
>> >be some information which says "this disk has been erased and since then 
>> >nothing has happened",

>> > but probably not part of the SCB, since the disks 
>> >aren't yet part of a shadow set.
>> 
>> Actually the disks do look like dismounted shadowset members after
>> an INIT/SHADOW.

>Yes, but not after INIT/ERASE/NOSHADOW.

If you are thinking of a magic bit that states that there is a magic bit
on the drive that states "this drive has been zeroed", there isn't.

Actually there is, there is an array of 4096 bits*disk size in blocks
where "erased" is the inverse of the OR of all these bits... :-)