Partition 1 does not end on cylinder boundary

Nathan Stratton Treadway ubuntu.lists at nathanst.com
Wed Feb 23 20:37:26 UTC 2011


On Wed, Feb 23, 2011 at 13:15:14 -0500, Asif Iqbal wrote:
> I just installed lucid 64bit server and looks like /boot partition
> overlaps. I built few other
> lucid 64bit server. They all show the same overlap.
> 
> # fdisk -l /dev/sda
> 
> Disk /dev/sda: 146.0 GB, 145999527936 bytes
> 255 heads, 63 sectors/track, 17750 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: 0x0008911b
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sda1   *           1          31      242688   83  Linux
> Partition 1 does not end on cylinder boundary.
> /dev/sda2              31       17750   142332928   8e  Linux LVM

This listing doesn't show that they partitions actually _overlap_, only
that the "cylinder 31" is split between the two.  (Note that this
cylinder calculation is really just arbitrary, based on based on the
logical heads/sectors geometry assigned to the disk)

Running "fdisk -l -u /dev/sda" should show you that the two partitions
don't actually share any sectors....

						Nathan




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