Partition 1 does not end on cylinder boundary

[Asif Iqbal]

On Wed, Feb 23, 2011 at 3:37 PM, Nathan Stratton Treadway
<ubuntu.lists at nathanst.com> wrote:
> 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....

yep, they don't share the same sector.

# fdisk -l -u /dev/sda

Disk /dev/sda: 146.0 GB, 145999527936 bytes
255 heads, 63 sectors/track, 17750 cylinders, total 285155328 sectors
Units = sectors of 1 * 512 = 512 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   *        2048      487423      242688   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2          487424   285153279   142332928   8e  Linux LVM


So just ignore this alert? Also, is it still possible to
change the end cylinder of the /boot partition without breaking the grub?

I think I am using grub2 per this

# grub-install -v
grub-install (GNU GRUB 1.98-1ubuntu10)

>
>                                                Nathan
>
> --
> ubuntu-server mailing list
> ubuntu-server at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-server
> More info: https://wiki.ubuntu.com/ServerTeam
>



-- 
Asif Iqbal
PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?