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Old 10-01-2007, 09:16 AM   #1
eponymous
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Registered: Oct 2004
Distribution: Gentoo
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fdisk reports odd "Start "and "End" sectors on single partition


Hello,

I have a Western Digital 120 GB hard disk which I have put a single parition on using fdisk.

However, when I do a:

Code:
fdisk -u /dev/hdd
I get the following output:

Code:
Disk /dev/hdd: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdd1              63   234436544   117218241   83  Linux
Why doesn't the hard disk start at sector 0 and end at sector 234441648 (or 234441647 if it counts from 0).

What is all the other space being used for?

Is there any way I can view what is in this extra space?


Thanks in advance.


----------------------------------
Supplemental:

My other hard disk in this system (the one with all the boot, root and swap crap on it) reports the same thing:

Code:
Disk /dev/hdc: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdc1   *          63       80324       40131   83  Linux
/dev/hdc2           80325     1092419      506047+  82  Linux swap / Solaris
/dev/hdc3         1092420   234436544   116672062+  83  Linux
----------------------------------

Last edited by eponymous; 10-01-2007 at 10:28 AM.
 
Old 10-01-2007, 09:49 AM   #2
teckk
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Registered: Oct 2004
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I believe that the first 63, 0 - 62 is the MBR and fdisk is not counting that on the partition.
http://linuxcommand.org/man_pages/fdisk8.html

Last edited by teckk; 10-01-2007 at 09:53 AM.
 
Old 10-01-2007, 11:02 AM   #3
eponymous
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Thanks.


Does anyone have any ideas as to why the "End" of /dev/hdc3 is not at 234441648?

There seems to be 5104 sectors un-accounted for :S
 
Old 10-01-2007, 03:41 PM   #4
eponymous
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Registered: Oct 2004
Distribution: Gentoo
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Supplemental:

It appears that if I run fdisk /dev/hdd (a drive with only one parition on it called /dev/hdd1), I cannot make another partition as fdisk complains about there being no free sectors.

However, using fdisk -u /dev/hdd will allow me to make a small parition that fills up the rest of the drive.

What the hell is going on here?! the "-u" option simply states you want the partition sizes displayed as sectors rather than cylinders!

Last edited by eponymous; 10-01-2007 at 03:50 PM.
 
  


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