[OpenAFS] vos examine oddity

[Jeffrey Hutzelman]

On Friday, January 28, 2005 05:34:27 PM -0700 Dexter Kimball <dhk@ccre.com> 
wrote:

> Jeffrey Hutzelman has clarified things nicely in his other email.
> Jeffrey, I rephrase here to see if I got it:
>
> First line, " root.afs.readonly                 536901459 RO         10 K
> On-line  " , refers specifically to the volume being examined, saying in
> effect "This particular volume is a type RO volume with volID 536901459"
>
> Second line is location " magic.lab.ccre.com /vicepa"
>
> What Jeffrey clarifies is that the next line is _not_ about the specific
> volume being examined, but instead gives information about the volume
> "family" of which this volume is a member.

It is about the volume being examined, but what it tells you are that 
volume's relations to other volumes in the same "volume group" on the 
fileserver.  Recall that a volume group is essentially a set of volumes 
that share inodes (through cloning and copy-on-write).



> So " RWrite  536901458 ROnly          0 Backup          0     "
>
> reads
>
> I have a parent RW, ID 536901458.
> I, the RO volume, am not replicated.  (There may be other replicas like
> me, but I myself am not the source/parent of any replica)
> I, the RO volume, do not have a corresponding Backup volume (My parent RW
> may have a Backup volume, but I am not the source/parent of any Backup
> volume)

Yes, as long as you bear in mind that these are about relationships between 
volumes on disk, and not on any other partition or server.

-- Jeff