4k Sectors

Charles Curley charlescurley at charlescurley.com
Sun Feb 14 16:04:47 MST 2010

On Sun, 14 Feb 2010 12:26:30 -0700
Stuart Jansen <sjansen at buscaluz.org> wrote:

> Yesterday I installed a couple of Western Digital Caviar Green drives.
> Today I read the following article:
> http://www.osnews.com/story/22872/Linux_Not_Fully_Prepared_for_4096-Byte_Sector_Hard_Drives
> Sure enough, when I check my drives were unaligned. Thankfully LVM
> made repartitioning relatively painless. I didn't think to get exact
> numbers, but I can tell you based on personal experience as I watched
> a terabyte of data do the two step, aligning the partitions made a
> noticeable difference.

Bingo, thank you.

Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000dd427

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1          30      240943+  83  Linux
/dev/sdb2              31      182401  1464895057+   5  Extended
/dev/sdb5              31      182401  1464895026   8e  Linux LVM

Now how do I re-align my drive? The first partition is /boot, so I
don't really need to do that one. Are there GUI tools I can use,
preferably on a live CD?



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