Teradata database service account definitions?

Database

Teradata database service account definitions?

I'm trying to get a handle on our Terdata database service accounts and what their definitions are for our CyberArk password vault. We are currently going through an IT SOX Audit and we need to be able to explain what each database service account is used for and whether or not the password's for them can be changed. The first list below are our Core Teradata Accounts or Custom Accounts that we created sometime during our installation. The second list are the Teradata Core Standard Database User Accounts. Can anyone help identify for us what are the definitions for the Database Service Accounts?

Thank you,

Ron

 

TD Core or Custom Service Accounts
overwatch
Administrator
Any
root
dbc
dbadmin
DBASTATS
DBABKUP
DM_READ_A
DM_READ_B
DM_READ_C
DM_READ_D
DM_READ_F
DM_READ_G
DM_READ_E
DM_READ_H
DMRead1
DMRead2
DMWrite1
DMWrite2
atdb
sysadmin
systemfe
admin
dmuser
arc
MSE

 

TD Core Service Accounts
$NETVAULT_CATALOG
ALL
CONSOLE
CRASHDUMPS
DBC
DBCMANAGER
DBCMNGR
DEFAULT
EXTUSER
NETVAULT1
NETVAULT2
PUBLIC
SPOOLRESERVE
SYSADMIN
SYSDBA
SYSTEMFE
SYSLIB
SYSUDTLIB
SYS_CALENDAR
TDPUSER
TDWM
VIEWPOINT
LOCKLOGSHREDDER
EXTERNAL_AP