[CentOS] [OT] disk utility showing message "the partition is misaligned by"

On 04/22/2016 10:19 AM, Robert Nichols wrote:
> On 04/22/2016 09:43 AM, g wrote:
>> ]$ sudo blockdev --getalignoff /dev/sdc1
>> 0
>> ]$ sudo blockdev --getalignoff /dev/sdc2
>> 0
>> ]$ sudo blockdev --getalignoff /dev/sdc5
>> 2560
>> ]$ sudo blockdev --report /dev/sdc1
>> RO    RA   SSZ   BSZ   StartSec            Size   Device
>> rw   256   512  4096       2048       838860800   /dev/sdc1
>> ]$ sudo blockdev --report /dev/sdc2
>> RO    RA   SSZ   BSZ   StartSec            Size   Device
>> rw   256   512  4096    1640448      1048576000   /dev/sdc2
>> ]$ sudo blockdev --report /dev/sdc5
>> RO    RA   SSZ   BSZ   StartSec            Size   Device
>> rw   256   512  4096   33848955    328282081792   /dev/sdc5
>>
>> so, blockdev does not show end, but does confirm sdc5 start is off
>> by 2560, same as fdisk.
>>
>> all of which indicates i should repartition drive with fdisk.
>>
>> is there any easier way such as using gparted or sparted so that
>> partitioning will be by cylinder and not sector?
>
> You do not want to partition by cylinder.  The CHS geometry that
> fdisk reports has been meaningless on hard disks for at least the
> last 10 years and bears no relationship to the actual cylinders on
> the drive.  At that arbitrary 255 heads 63 sectors/track geometry,
> you might have to skip over 7 full "cylinders" to find one that
> starts on a 4096-byte boundary. The version of fdisk in CentOS 6
> is old, and still defaults to the deprecated cylinder units.  You
> should always switch to sector units when using it. The warning
> about partitions that do not start or end on a cylinder boundary
> should be ignored.
>
===>

Robert, apologies for delay in replying.

in checking back thru old threads before archiving, i found that i failed
to thank you for reply.

my apologies and thank you.


-- 

peace out.

CentOS GNU/Linux 6.8

tc,hago.

g
.

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