On Fri, 2011-07-22 at 09:35 +1000, yudi v wrote:
> >
> > Making the bs value an integer multiple of
> > the the physical block size of the device is probably a good idea in
> > most circumstances.
> >
> >
> Going back to my original question, as the HDD I am using is a 4096 physical
> and 512 logi
>
> Making the bs value an integer multiple of
> the the physical block size of the device is probably a good idea in
> most circumstances.
>
>
Going back to my original question, as the HDD I am using is a 4096 physical
and 512 logical block, what would be a recommended bs value.
Yudi
--
users
On Jul 21, 2011 7:20pm, Patrick O'Callaghan wrote:
Neither of these points is relevant in the case posited by the OP. She's
writing directly to the drive, not to some file. There is no question of
random versus sequential and there's no filesystem block allocation
going on.
As you may have gu
On Thu, 2011-07-21 at 15:34 +0300, Gilboa Davara wrote:
>
> > Sorry, could you please elaborate a bit more on how a higher size
> > block results in better performance.
> >
> > --
> > Kind regards,
> > Yudi
> >
>
> Ouch, of the top my head, there two major reasons:
> 1. (Mechanical) disk drive
> Sorry, could you please elaborate a bit more on how a higher size
> block results in better performance.
>
> --
> Kind regards,
> Yudi
>
Ouch, of the top my head, there two major reasons:
1. (Mechanical) disk drives (AKA Hard drives) dislike random read/writes
as their require the drive to
On 21 Jul 2011 at 20:15, yudi v wrote:
Date sent: Thu, 21 Jul 2011 20:15:39 +1000
Subject:Re: Overwriting a 4096 byte sector harddisk drive with random
data
From: yudi v
To: Community support for Fedora users
Send reply to: Community support for Fedora users
On Thu, Jul 21, 2011 at 8:04 PM, Gilboa Davara wrote:
> On Thu, 2011-07-21 at 19:48 +1000, yudi v wrote:
> > Hi
> > From what I understand, the first command above will write data in
> > 512 byte blocks, the second one in 1MB blocks, and the third in 4096
> > byte blocks. Right?
>
> Yep.
> The 1
On Thu, 2011-07-21 at 19:48 +1000, yudi v wrote:
> Hi
> From what I understand, the first command above will write data in
> 512 byte blocks, the second one in 1MB blocks, and the third in 4096
> byte blocks. Right?
Yep.
The 1M should also yield considerably better performance. (Though the
random
Hi
I need to write random data to a partition before encrypting it. Suggested
way is to use urandom:
#dd if=/dev/urandom of=/dev/sda2
What is the use of operand "bs" in the following case? I see the above
command executed as follows sometime:
#dd if=/dev/urandom of=/dev/sda2 bs=1M
For the hard
