Re: 4k sector size and WD20EARS

[Alexander Clausen <alex@gc-web.de>]

On 04/08/2010 06:02 PM, Martin K. Petersen wrote:
> For unknown reasons these drive report themselves as 512-byte drives
> despite using 4096-byte sectors internally.

ouch.

> However, recent fdisk/parted will align on a 1MB boundary by
> default which happens do the trick in this particular case

> Alexander>   1 Primary 0 3907024064 63 3907024065 Linux (83) None
> Alexander>  alex@hal:~$

> No, you should shift the start sector using the fdisk's advanced menu.

I created this partition table using cfdisk (util-linux 2.17 from debian/experimental). I guess even 
that is too old?

I now re-created the partition table using fdisk from util-linux-ng git and got this:

Command (m for help): p

Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes
81 heads, 63 sectors/track, 765633 cylinders, total 3907029168 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: 0x2afff6d1

    Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048  3907029167  1953513560   83  Linux

but:

$ sudo cfdisk -P s /dev/sdb
FATAL ERROR: Bad primary partition 0: Partition ends in the final partial cylinder

bug?

thanks for the help,
Alexander