On 06/22/2014 07:11 AM, Roman Mamedov wrote:
On Sun, 22 Jun 2014 06:44:13 -0700
George Mitchell <geo...@chinilu.com> wrote:
On 06/22/2014 12:49 AM, Imran Geriskovan wrote:
The 64KB Btrfs bootloader pad is 8 sector aligned, so for 512e AF disks
there's no problem formatting the whole drive. The alignment problem
actually happens when partitioning it, using old partition tools that don't
align on 8 sector boundaries. There are some such tools still floating
around.
A 'somewhat' related question:
So called Advanced Format drives has 4K physical sector size,
however they report 512B logical sector size.
How does linux kernel access those drives?
512B or 4K at a time?
This is a problem related to Western Digital drives. They lie in order
to be compatible with older versions of Windows.
Wake up and smell the coffee.
Device Model: HGST HTE725050A7E630
Sector Sizes: 512 bytes logical, 4096 bytes physical
Device Model: TOSHIBA DT01ACA050
Sector Sizes: 512 bytes logical, 4096 bytes physical
The "AF" standard as accepted by the industry does include this "lying", and
it's not just WD doing this by any stretch of the imagination. Aside from
USB-only drives (which lack the ability to be plugged into SATA), no one can
afford to produce and a drive incompatible with Windows these days. In fact
I'd be glad if you could support your Seagate 4K claim by any model names and
their smartctl output.
Here is the story:
http://johannes-bauer.com/linux/wdc/?menuid=3
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