LinuxQuestions.org - Creating new partition

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Creating new partition

I need to create a partition 15MB in size on the 1st hard drive of my RHEL system

So far I typed:
fdisk /dev/sda <enter>
c <enter>
m <enter>
p <enter>
d <enter>
1 <enter>
n <enter>
p <enter>
1 <enter>
+15M <enter>
+15M <enter>

This is where I am getting hung up. When I try to go back to view the new partition table, I hit p <enter> and I now see /dev/sda1 and this displays:

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-5221, default 1): +15M
Last cylinder, +cylinders or +size{K,M,G} (2-63, default 63): +15M

Command (m for help): p

Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0005ac32

Device Boot Start End Blocks Id System
/dev/sda1 2 4 24097 83 Linux
/dev/sda2 64 5222 41430016 8e Linux LVM

I know I previously deleted the 1st partition so this new one I created (ID 83) is what I just did but why cant I see the size I input of 15MB? Did I input this incorrectly?

Thanks in advance for any assistance offered.

Quote:

Originally Posted by PleaseHelpMeUnderstand (Post 5548240)

I know I previously deleted the 1st partition so this new one I created (ID 83) is what I just did but why cant I see the size I input of 15MB? Did I input this incorrectly?

Well not sure why you entered all those commands, but while running fdisk, afaik, will not show MB in the print screen, just blocks.

Here is how I would have done. ( I use the p alot to verify what i want to do and that is what happened)

Code:

fdisk /dev/sda

p

d <---assuming delete a partion

1 <---deletes partition 1

p 

n

p <---primary partition

1 <---partition 1

return <---use first sector (you tried to tell it to go +15M which Ive never seen that syntax for first sector)

+15M <---last sector for the size you want

p

w

Now if i understood blocks correctly, simply divide that number by 2 and you would get number of 1024 bytes, or kilobytes.

But if you prefer seeing in MB or such, why not try cfdisk instead of fdisk.

Quote:

Originally Posted by dab1414 (Post 5548264)

Code:

fdisk /dev/sda

p

d <---assuming delete a partion

1 <---deletes partition 1

p 

n

p <---primary partition

1 <---partition 1

return <---use first sector (you tried to tell it to go +15M which Ive never seen that syntax for first sector)

+15M <---last sector for the size you want

p

w

Ok thank you. What should I have input for the 1st sector since I put 15M? I didn't understand & honestly was :banghead: so I just put it for both first and last sectors since I wanted the size to be 15MB.

Ok so wait... are you saying to input NOTHING and just his return for the 1st sector? I don't think I understood you until I read it again:doh:

Quote:

Originally Posted by PleaseHelpMeUnderstand (Post 5548283)

yes just hit enter for first sector. there are plenty of guides how to use fdisk, like this

Quote:

Originally Posted by dab1414 (Post 5548293)

yes just hit enter for first sector. there are plenty of guides how to use fdisk, like this

After I did this, I hit w to write the table to disk and exited at which point I received a message that the new partition will be used at the next reboot... only at my desk reboot I now have a black screen (please view attachment) and can't do anything on it