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MX7000 Power on sequence
I'm preparing for DES-4421 Exam, so I practice with Dell EMC Certification Exam from Dell site (https://education.dellemc.com/content/emc/en-us/home/certification-overview/find-exam.html)
I keep struggling with one question and cant get correct answere, could someone enlighten me with the knowledge for following question,
An administrator attaches all six PSUs of an MX7000 chassis to the rack active PDU. What is the correct power on sequence taken by the chassis?
- Fabric D powers on
- EC Uboot starts
- LCD panel loads
- PSU firmware starts
- LCD powers on and displays WAIT message
???
Ps. I've already read all White Papers but still dont get it.
Kind regards
Marcin
DELL-Chris H
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September 23rd, 2019 07:00
abMarcin,
I believe the answer you're looking for is on page 9 here, which states the power supplies are the first.
Hope this helps.
abMarcin
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September 24th, 2019 03:00
I've already read that couple of times but still I miss some information.
I tryied out alot of different order's but still I cant get the correct answere.
That's my orders
1 - EC Uboot starts
2 - PSU firmware starts
3 - Fabric D powers on
4 - LCD powers on and displays WAIT message
5 - LCD panel loads
Could you please correct me, what and why its wrong ?
Kind Regards
Marcin
leonardo_delatim
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January 11th, 2021 05:00
Good morning everyone!
The correct Power on sequence to MX7000 modular platform is:
AC applied to circuit/Plug in Power Cables =>
PSU FW Starts =>
Standby Power Available =>
MM Uboot Starts =>
MM Powers on one PSU =>
12VDC Rail on =>
Power to Front Panel/load and displays (WAIT MSG) =>
Turns on fans and sets PWM to cool MM =>
MM powers on FAB D switch and loads FW =>
MM Completes booting =>
Load LCD Panel =>
LDC Read/Panel ready for input/Power on MSM>MSM Linux boots>MSM Ready.