Artesyn ATCA-F120 Installation and Use (August 2014) - Manual (Page 69)

Functional Description
ATCA-F120 Installation and Use (6806800D06J) 69
After power-up, the watchdog is served by the U-boot firmware. Once an operating system
(OS) has successfully booted, the OS is in charge of serving the watchdog. The OS distributions
which are distributed for the ATCA-F120, i.e. in particular the Basic Blade Services software for
the ATCA-F120, serve the watchdog by default. On expiry, the watchdog resets the ATCA-F120.
If required, you can switch off the watchdog via an on-board switch. See Configuring the Blade
on page 28 for details.
4.6 Boot and User Flashes
The ATCA-F120 is equipped with two boot and two user flash devices.
4.6.1 Boot Flashes
In order to support high availability requirements, the ATCA-F120 is equipped with two
redundant boot flash devices, in the following named boot flash #1 and boot flash #2. Both are
Intel Strata flash devices which are programmed with identical images during the blade
production. Each flash device has a size of 32 MBytes.
The boot flashes contain the U-Boot firmware as well as the Linux kernel images. For details
refer to
Memory Map on page 95 .
By default, the ATCA-F120 always boots from boot flash #1. The boot flash device from which
to boot after the next reset/power cycle can be determined via IPMI and on-board switches. For
further information refer to
Configuring the Blade on page 28 and the ATCA-F120: Control via IPMI
Programmer’s Reference (section: Supported Commands->Chassis Device Commands->System
Boot Options Commands).
4.6.2 User Flashes
The ATCA-F120 is equipped with two user flash devices. Both are standard NAND flash devices
which are connected to the local bus of the MPC8548E PowerQUICC III CPU. Each NAND flash
has a size of 2 GByte.
In its default configuration, the ATCA-F120 has two redundant root file systems
preprogrammed in the NAND flashes. See
Memory Map on page 95 for further details.