What is fdisk mbr

Thread starter fbsd1 Start date Feb 27, This legacy standard has continued un-updated to this current time and contributes to the limitations imposed on booting, disk layout and selection of which allocation on the hard disk to boot from.

The hard drive has a MBR Master Boot Record a byte block located in sector-0 of the first physical track on the hard drive. This MBR code is responsible for parsing the partition table and finding the bootable partition that is marked 'active'. The MBR code then sets up the disk-address-offset information for the bootable partition, and reads 'relative sector zero' from that partition, and transfers control to that one-sector block of code that contains the unique operating system code to load into memory.

This hard drive byte MBR is where all the limitations are. Due to its size the MBR partition table is limited to 4 entries. This means no matter how large your hard drive is 20MB or GB you can only sub-divide it into a maximum 4 partitions. It displays a menu giving you the option to choose which one you want to boot from. Vapor Distinguished. Jun 11, 2, 0 19, 0. You really shouldn't have posted this all over the place. Anyway, it is useful, but should be used rarely who reinstalls windows more than once a month under normal circumstances?

AFAIK, boot sector viruses are quite rare, too. Anyway, this post is quite unnecessary except for those who desire this very specific piece of information. This entire thread is essentially pointless Damn Rambus. RobD Champion. Dec 20, 19, 0 50, 0. Do you know which philosopher said that? Dolly Parton.

May 29, 0 18, 0. Jun 8, 87 0 18, 0. Ok, now I feel guilty. The first time I saw this post I was like 'waddafuk? Sep 15, 1, 0 19, 0.

I replied to this guys repeated post in a couple of the other threads. I also critisized some bad advice he gave somone in the memory section. You should see the private message this lunatic sent me. SoDnighthawk is a twisted little angry man. SoDnighthawk if your reading this take some good advice and grow up. You will get nowhere in life trying to be a forum tough guy.

You need to chill out relax, Only a weak man would send such a cowardly private message. You could certainly never intimidate me. If I glanced at a spilt box of tooth picks on the floor, could I tell you how many are in the pile. Not a chance, But then again I don't have to buy my underware at Kmart. The control chip also has a MBR as I explained in my post. You can never admit that you are wrong, can you. I reload XP every three months too, but never because I had a problem, just a preemptive strike in a way.

What were you trying to do??? The n00bs don't give a [-peep-] about it because they all have specific, unrelated, questions and are generally trying looking to upgrade or fix a minor glitch. Again, what were you trying to do?? Oh yeah, if you want respect in this place, don't bully, don't troll, and get your f-ing facts straight. Oh man, bullying now, too? SOD is f-ed up. This is how IC's are programmed in the electronics industry. I am sorry you will never have the education I have.

I have more BA's after my last name then you have colours of nail polish. The fact that you cant accept that your were born short the whole cookie jar is not my problem. You see we charge them money to make sure they get a brand new Hard drive install the fact that you have residual viruses remaining in your EEPROM Master Boot Record controller chip is the reason I posted the information in the first place so none educated individuals like you could learn something important.

The fault you keep getting side tracked on is you think the Master Boot Record is in the hard drive and I keep trying to tap on that grey matter you have so you can realize there is a separate MBR on a computer chip soldered to the circuit board of the Hard Drive that is used during your FDISK command to ensure the read write and boot sectors are formatted into the drive in the correct locations and that they are verified. Where in hell do you think all that marvellous information is stored and refreshed during your FDISK command.

Every hard rive made has this controller chip start reading your DOS programming and hardware device schematics. If you can read schematics. I hate it when a troll makes me write stuff. However I must admit you've been able to create enough confusion as it is right now. So here we go Nightdork. The functionality of chip you're talking about exists only in your head.

There's only one MBR, and it's in the platters. This first sector of the hard disk is called the master boot record or sometimes the partition table or master boot block.

There is a small program at the beginning of this sector of the hard disk. The partition information, or partition table, is stored at the end of this sector. This program uses the partition information to determine which partition is bootable usually the first primary DOS partition and attempts to boot from it. A partition program writes a master partition boot sector to cylinder 0, head 0, sector 1.

The data in this sector defines the start and end locations of each of the other partitions. It also indicates which of these partitions is active, or bootable, thus telling the computer where to look for the operating system.

All systems can handle 24 partitions, either spread out on the same drive or many drives. This means that one can have up to 24 different hard drives, according to DOS. DOS can't recognize more than 24 partitions though there was the rumour that it could support up to disk drives , although some other operating systems may. The limiting factor is simply the availability of letters.