IBM GC09-2830-00 - Manual (Page 180)

v Can contain 1 to 8 characters
v Cannot include &, #, and @
v Must be unique within the network
DB2SYSTEM Naming Rules
DB2 uses the DB2SYSTEM name to identify a physical DB2 machine, system,
or workstation within a network. On OS/2, you must specify the
DB2SYSTEM name during install. On Windows 32-bit operating systems, you
do not need to specify a DB2SYSTEM name; the DB2 setup program detects
the NT Computer name and assigns it to DB2SYSTEM.
When creating a DB2SYSTEM name, see “General Naming Rules” on
page 165.
In addition, the name you specify:
v Must be unique within a network
v Can contain a maximum of 21 characters
Password Rules
When determining passwords, consider the following rules:
OS/2 A maximum of 14 characters.
UNIX A maximum of 8 characters.
Windows 9x or Windows NT
A maximum of 14 characters.
168 Quick Beginnings