Meridian Nortel 1 Option 11C Technical Reference Manual page 222

Page 222 of 544
553-3011-100 Standard 14.00
System Controller cards
The NTDK97AB contains 48 MBytes of flash memory storage:
• 32 MBytes are used for operating system programs and overlay
programs.
• 16 Mbytes are used for the Primary Flash Drive, also referred to as the c:
drive. The Primary Flash Drive stores the primary copy of the customer
data, patches, and other configuration data.
Boot ROM and Backup Memory
Boot ROM and backup memory is a 2 Mbyte storage device located on the
NTDK97 MSC card. The boot code is stored in this memory. This memory
also contains the backup flash drive, also referred to as the z: drive. The
backup flash drive stores a backup copy of key system data, the customer
database, and patches. The minimum release of bootcode for the MSC is
NTDK34FA Release 03. You should upgrade the boot code to the latest issue
each time the software is upgraded. The boot code can be found on the
programmed PCMCIA card.
DRAM
The NTDK97 MSC card is equipped with 16 Mbytes of temporary memory
space called DRAM. (This memory is located on the motherboard. It is not
on a separate SIMM.) DRAM functions much like RAM on a computer
system, whereby system and user files are stored while the system is up and
running. DRAM on the Option 11C Mini stores operating system files,
overlay data, patch codes, and the active copy of the customer database.
January 2002