Quick boot time Navigation Military and Commercial Aircraft

Quick boot time Navigation Military and Commercial Aircraft

Post by linni » Fri, 05 Aug 2005 03:30:42

Most of them use Flash Drives. Even for trucks, the vibrations are
hard disk killers. Flash Drives can boot in seconds, instead of
minuties for hard disks.

You can fit Window 98 on a 512M Compact Flash Drive.

See http://www.yqcomputer.com/

For mission critical components, they keep power on all the time.
Don't bother with power cycles. Compact Flash Drive draw less than
0.1W stand-by.

Quick boot time Navigation Military and Commercial Aircraft

Post by Russel Mil » Fri, 05 Aug 2005 13:59:53

On commercial aircraft or military they have embedded systems that boot up
as soon as power is supplied plus the software is a quick boot.

How can the same system be duplicated because it will be used on a boat.

Trouble is the navigation programs are for Windows 95, 98, XP operating

I would like to know if there is any other products out there that can be
purchased and software that dose not have to use a PC based board or if it
dose has a quick boot up time.

Even if a costmized system has to be made up or even close to this sort of

I would like to know what embedded systems aircraft use.

Thanks Russel


Quick boot time Navigation Military and Commercial Aircraft

Post by cs_postin » Fri, 05 Aug 2005 22:48:38

Flash drives are used for mechnical reliability, but not for boot
speed. Hard drive technology has far faster data transfer rates -
video for example only works from a flash card when compressed to
reduce the data rate.

Boot speed comes from lessening the amount of work that has to be done
on boot. I have a windows PC that can 'boot' almost instantly at the
touch of a button. Of course it's not actually booting, it's just
restoring the suspended state of the operating system. If you have a
high degree of predictability in your hardware configuration, you can
do something similar - figure everything out ahead of time so that all
you actually have to do on power up is some critical configuration of
already well identified peripherals, and load a working O/S image off
nonvolatile storage. The simpler the system, or failing that, the more
access you have to OS internals, the easier it is to achieve this.