I try to direct an offline backup of a database to a remote disk (san).
I keep getting

SQL2036N The path for the file or device "<path/device>" is not valid  .

Any suggestions much appreciated.

The DB2 engine runs as a service on NT, and by default the service does
not have the authority to access remote drives.  One thing you can do is
to run Control Panel->Services, select "DB2 - DB2" (or whatever the name
of your instance is), click on Startup, and log in as a particular account
rather than the default System Account.  It may also be possible to grant
LAN-access rights to the System Account, but I've never figured out how
that's done.

dave
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