Hi, 
I have now a NW server v7.2.1 in production on a HPUX v11.11 machine. 
It uses a IBM3494 library with 3592 drives type. Due to HBA settings, I 
suppose, the networker server uses a block size on its tape 256K in size, 
while networker has per default a blocksize 384K in size, for the same 
3592 model. 
The datazone has 20 storage nodes, both HP and Sun, using each its own 
blocking factor ( tipically 256K HP, 384K Solaris ).
During one year in production, no problem to backup/restore. 
Now I have to migrate the server on a Solaris v9 platform, Networker 
v7.2.1. 
I've seen that the HBA driver, working with networker , uses a blocksize 
384K in size. 
I obviously have to use all the tapes I've already used on HPUX, to 
recover data from or to append new backup to, and therefore I have 
absolutely to be sure that there are no misunderstandings reading tapes 
labeled/written on HP from the new Solaris server. My idea is to set 
NSR_DEV_BLOCK_SIZE_3592 variable to 256 on the new Solaris server, adding 
it to the networker start script. 
I think also that this variable's change will affect only the networker 
server, and not the storage nodes ( thay'll continue to use their own 
blocking factor ). 
I'll do the right thing setting up this variable on the solaris server ? 
It's the right way to be sure that all the tapes written on the HP 
platform will be readable/rewritable on the Solaris one ?? And what about 
the storage nodes ??? 
Thanks a lot for any suggestion 
Pierpa

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