[lkml]   [2010]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [ANNOUNCE] util-linux-ng v2.17 (stable)
On 01/11/2010 06:05 AM, Pavel Machek wrote:
> On Fri 2010-01-08 13:43:47, H. Peter Anvin wrote:
>> On 01/08/2010 01:33 AM, Karel Zak wrote:
>>> fdisk:
>>> - the fdisk command aligns newly created partitions to minimum_io_size
>>> boundary ("minimum_io_size" is physical sector size or stripe chunk
>>> size on RAIDs).
>>> - the fdisk command supports disks with alignment_offset now.
>> I think we should align, by default, much more aggressively than that --
>> because frequently we just don't know what the real physical alignment
>> is (think of flash media, which uses large erase blocks underneath.)
> Flash has special mapping layer, and does not care (SD/MMC), or is a
> raw nand and can't be used as block device (smartmedia).

Uhm, that's just plain wrong.

It doesn't matter if there is a "special mapping layer" -- if you're
crossing multiple erase blocks you're still having more churn in your
flash translation layer, with more wear on the device, and lower
performance than if you didn't.


 \ /
  Last update: 2010-01-11 17:55    [W:0.085 / U:0.420 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site