Thanks for the info Chris. Since I posed the question I've done a bit more searching and came up with this from "Building Geodatabases Course Q&A by Rudy Prosser:
Q: What’s the size of the BLOB in a file geodatabase (used to store attachments)?
A: Field size information is documented in ArcGIS Help at several locations. If you’re using an RDBMS to store your geodatabase, see DBMS data types supported by ArcGIS. If you’re using a file geodatabase, see File geodatabase size and name limits. For information on supported field types, see ArcGIS field data types. As best as I can determine, the maximum BLOB size is 2 GB.
http://resources.arcgis.com/en/help/main/10.2/index.html#//003n0000001m000000
Also, ESRI 10.2 help had this about file Geodatabases:
File geodatabase size and name limits
Geodata » Administering geodatabases
File geodatabase size and name limits are as follows:
File geodatabase size: No limit
Table or feature class size: 1 TB (default), 4 GB or 256 TB with keyword
Number of feature classes and tables: 2,147,483,647
Number of fields in a feature class or table: 65,534
Number of rows in a feature class or table: 2,147,483,647
Geodatabase name length: Number of characters the operating system allows in a folder name
Feature class or table name length: 160 characters
Field name length: 64 characters
Text field width: 2,147,483,647
From http://resources.arcgis.com/en/help/main/10.2/index.html#/File_geodatabase_size_and_name_limits/018s...
Seems like the 2Gb is a recurring theme so I feel comfortable in agreeing with Rudy's assessment.
Hopefully this will help others as well.
Thanks!
