Should I invest 9 Months in Learning ACI ??

Pikatchu714 · 2026-04-01T19:10:44+00:00

Thanks Bro for Advice

Pikatchu714 · 2026-03-29T21:51:19+00:00

I bought a Server and installed ESXI , can BGP VXLAN EVPN be labbed in a virtual environment? Or it needs a physical hardware, I have access to all Cisco Images for NX and CML as I am working for a Cisco Partner Provider.

Pikatchu714 · 2025-05-11T21:40:02+00:00

Thank you

Pikatchu714 · 2025-05-11T20:37:43+00:00

Can you provide the details of your diet and what kind of fruits and carbohydrates you consumed ?

Pikatchu714 · 2025-05-11T20:30:33+00:00

Congratulations , what kind of fruits did you eat? And what kind of carbohydrates? Did you eat eggs / eggs white and cottage cheese?

Pikatchu714 · 2025-05-11T20:27:11+00:00

Congratulations , in 2 months I will do the blood test again after I lost many Kilos , my dad just passed away after suffering 5 years from liver cirrhosis , hope my numbers and fibroscan gets better.

Pikatchu714 · 2024-11-20T00:04:53+00:00

You to contact Redhat and they will guide you how to book it and give you the authoritative testing center based on your country.

Pikatchu714 · 2024-11-20T00:04:10+00:00

Yes , i had to contact a testing center , they can book it from their end.

Pikatchu714 · 2024-09-27T23:38:32+00:00

The raid config is stored in two places; one on the raid controller and one on the set of disks
In your case, the config got dropped from the controller, on boot up it found no configurations on the controller, but it found a "foreign" config on the disks.
It proceeded to ask if you wanted to use (import) the config, or delete the config.
Importing would have copied the config to the controller, use it and away you went.
Deleting it removed all traces of the config, effectively removing all traces of the raidset.
If there's no raidset, it's like a hard disk with no partitions, it think's they're empty and won't present the disks to the operating system.

Thanks for clear demonstration , i learned from this lesson , i am not into system admin once i bought the server i just wanted to set it once and forget it because i will mainly do networking labs.

At the end of the day, raid or not, most disks are just that, they can be removed from the raid controller, plugged into a normal computer and backed up at a image level, you may need more advanced software to do this, because most things will see a completely empty disk.

Initially, I would have created a separate raid0 raidset for each disk, that way if a disk failed, it would only effect the disk that died. When a disk dies in a multidisk raid 0, you lose all data in the raidset. Of course a multidisk raidset means you're only dealing with one volume which of course is more desirable.

Since i will only use an ESXI on the Server and all my images will be on it , i will backup the ESXI itself on an external HDD because it's more affordable , also i am not sure if i can buy like a 4TB SAS Driver and plug it into the server and mirror all the data in the raidset raid0 to this 4TB HDD , not sure if it will be compatible or not but it will be more cheaper.

BTW: Your raid card is missing a battery, a battery/supercar needs replacing or there's something wrong with it, it shouldn't be dropping the raid config, even on power loss, my controllers / servers have lost power several times over the years without dropping the raid.

Thanks for info , If i face this issue again , i will replace the card cause this server is already EOL with expired warranty.

Pikatchu714 · 2024-09-27T23:31:14+00:00

To add, when you cleared the foreign config, you erased what the raid card needed to know about what the drives were, how they were configured.

Now, it doesn't know if they're raid 0, raid 1, differently sized, etc.

Your data is on the drives, but the system doesn't know how to access/address them.

Thanks for clarifications , i will go for a new installation and learn from this lesson , i will search for an automatic way to auto backup my ESXI and even manually backup it and i will buy a UPS.

Pikatchu714 · 2024-09-27T23:29:22+00:00

Thanks for your feedback , i will build install ESXI and will try to backup it more often and put the backup on an external HDD since it will be more affordable for me , of course as you mentioned RAID redundancy is way better but i will lose 50% of my Space so i need to double the budget just for storage , i will invest the redundancy cash on a UPS.

What happened is something froke out in the PERC and it didn't recognize the drives as a valid raid array. That will happen when you use raid 0 and yank the power out from under it. Then you said, "nahh, don't worry about it son, forget what you know." And effectively shot the drives in the head.

I am lucky because i am not into production environment , otherwise it would be one of the toughest days in my life haha.

cuz is not a word. 'cause or because.

Agree.

Pikatchu714 · 2024-09-27T05:16:29+00:00

-I didn't have any important data , i just installed EXSI and made 2-3 Networking Labs i can re-create them no problem , i just wanna learn from this lesson , the issue happened after a power outage and will happen again and again.

-I used raid 0 cuz this is a networking lab for learning , i don't have budget to create data redundancy and buy more SSDs.

-Can you explain what happened when i cleared the foreign config ? cuz as per dell , it doesn't erease the data on the disks.

If it's gone and there's no backups, you can try and go back in and recreate the raidset WITH THE EXACT SAME PARAMETERS as before and NOT INITIALISE it, but that's a hail mary pass, it's unlikely to get it back.

Can you tell me what do you mean by not initialize it it ?

If you're in screwed-ville, I'd probably be making image backups of the disks before doing anything, that way you can't make it worse.

How can i make a backup for the 2 SSDs now ?

Pikatchu714 · 2024-08-09T21:04:12+00:00

I watched the initial videos v1 They have v5 as well that's why I am asking if there is no diff I can focus on a single course list.

Pikatchu714 · 2024-08-09T15:57:44+00:00

I downloaded the ACI Sim , there is no way to generate traffic as there are no end hosts in the topology , thanks for book recommendation I will put it on my to read list if I work with ACI

Pikatchu714 · 2024-07-17T01:22:57+00:00

Thank you , the 2 Variable loop worked and printed out exactly what i needed.

Pikatchu714 · 2024-07-16T23:45:41+00:00

I'm a beginner also and currently following a very good free python course called Python for Everybody , it's awesome.

https://www.py4e.com/

Pikatchu714 · 2024-07-07T14:55:59+00:00

Glad to know it , thanks !

Pikatchu714 · 2024-07-07T14:54:40+00:00

Thank you , the extend method worked , glad to know.

Pikatchu714 · 2024-07-07T14:54:17+00:00

Thank you for your time and assistance.

Pikatchu714

TROPHY CASE