But just to push things a bit further, isn't PAV the key to getting into the rat's nest successfully? If a volume has PAV aliases, then CP can start more than one I/O on the volume at a time. And, if it is sufficiently broken into smaller minidisks, then Linux can take advantage of the PAV paths to the 3390 volume through the PAV aliases and the physical I/O's will be divided up among the emulating disks as appropriate.
Since my head is beginning to hurt (and yours as well, now) I'll leave it alone at this point. :D -- Robert P. Nix Mayo Foundation .~. RO-OE-5-55 200 First Street SW /V\ 507-284-0844 Rochester, MN 55905 /( )\ ----- ^^-^^ "In theory, theory and practice are the same, but in practice, theory and practice are different." On 3/26/10 11:55 AM, "Mark Post" <mp...@novell.com> wrote: >>>> On 3/26/2010 at 12:44 PM, RPN01 <nix.rob...@mayo.edu> wrote: >> Is the controller smart enough to >> be able to start an I/O to each, even though the I/O*s were sent to the same >> 3390 address? > > It might be, but CP and Linux are not, so the waters aren't all that muddy > after all. We really don't want to try to look behind the illusion that > storage arrays present to the CEC. That's a real rat's nest that would be too > difficult to keep up with over time, which is why the illusion is presented in > the first place. > > > Mark Post
