Riaan Louwrens wrote:

Brian,

What I see on a semi-regular basis is that drives that are attached to the seem to 
"change" their scsi path & thus drive ordering.

I.e. the SAN doesnt apply "persistant binding" of the addresses. So when the operating system comes 
up it assigns a "new" device handle to them as they are discovered. (this is specific to Windows - 
but I am sure Linux / Unix works on a similar principle (i.e. /dev/rmt/ocbn doesnt actually refer to 
"drive 1" in your library anymore)).

The way I test for it is (unfortunately a cumbersome route - but it works) to 
delete my libraries, create manual devices and then manually load tapes into 
each of them (note the tape labels) then to mount the tape in drive1 and see 
what labels comes up (do this for each of the drives).

Then you can re-create your library accordingly.

If your path to the autochanger is the same you should be able to use JBEDIT 
(7.x) to modify the paths to the drives.

One needs to ensure that the SAN has "persistant binding" of all the devices 
and then soemthign I have found to help (from Windows again - sorry) is to make sure that 
the scsi cards with lower adresses are on lower numbered PCI slots in yoru system (i.e. 
they get picked up first and get assigned device handles first) ...

Apologies if I have gone on a tangent for something you already know ... But 
this is where I have seen similar messages before.

Regards,
Riaan

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