[CentOS] RHEL/Centos6 handling disks w/4k sectors?

Mon Feb 7 08:55:20 UTC 2011
Alexander Dalloz <ad+lists at uni-x.org>

Am 07.02.2011 04:51, schrieb Ray Van Dolson:
> On Sun, Feb 06, 2011 at 02:50:34PM -0700, compdoc wrote:
>>> the best write speed I can get is about 8MB/sec
>> A while back I researched 4k sector drives since most new drives have them
>> now. There is a problem with speed if you get the partition wrong.
>> The answer seems to be to creating a partition with 1 meg of unpartitioned
>> space preceding the first partition. This causes sector 2048 to be the first
>> sector of the partition, and avoids the problem.
>> Newer versions of gparted do this for you automatically when you use it to
>> create a partition.
> Just did a SL 6.0 install on a machine with two Hitachi 2TB drives with
> 4K sectors.  parted warned me that the default values I'd chosen
> weren't optimal for the sector size and I adjusted manually.
> Note that I set these drives up post-install -- no idea if Anaconda
> would have done the "right thing" or not.
> Ray

RHEL 6's anaconda auto-aligns properly by starting at sector 2048.