Document that DB is booted in read-only mode if not able to create db.lck file
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         Key: DERBY-600
         URL: http://issues.apache.org/jira/browse/DERBY-600
     Project: Derby
        Type: Sub-task
  Components: Documentation  
    Reporter: Øystein Grøvlen
    Priority: Minor
     Fix For: 10.2.0.0


I suggest adding the following to the Developer's Guide after "Double-booting 
system behavior":

Booting a database in read-only mode

If Derby is not able to create the db.lck file when booting a database, the 
database will be booted in read-only mode.  This may happen due to lack of disk 
space or access rights for the database directory.  In this case, the boot 
message in the error log will look like the following:

<pre>
2005-10-04 12:12:30.835 GMT:
 Booting Derby version The Apache Software Foundation - Apache Derby - 10.2.0.0 
alpha - (293288M): instance c013800d-0106-bb8c-12e6-00001672f894
on database directory sample in READ ONLY mode 
</pre>

See also "Creating Derby databases for read-only use"

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