l i n u x - u s e r s - g r o u p - o f - d a v i s
L U G O D
 
Next Meeting:
November 4: Social gathering
Next Installfest:
TBD
Latest News:
Oct. 24: LUGOD election season has begun!
Page last updated:
2001 Dec 30 17:07

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] backing up the master boot record
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] backing up the master boot record



On Tue, Jun 19, 2001 at 12:49:01PM -0700, jdnewmil@dcn.davis.ca.us wrote:
> dd lets you define what "block" means for the purpose of accessing the
> input file or the output file with the read or write calls.  This may
> apply if the device driver is picky about the record sizes you read or
> write, but may vary from one device/driver to another, or the driver may
> be completely flexible on this value.  dd doesn't know what a cluster is,
> but by manipulating its idea of what a block is you may be able to extract
> better performance out of a device driver.  For example, when copying a
> floppy disk to an image file, selecting a relatively large number of bytes
> for ibs will let the floppy driver buffering grab as much data as possible
> in each system call (ibs or bs = 32768 for example).

It is often recommended to specify bs=18k when duplicating floppy disks
images, since this block size aledgedly meshes well with the hardware buffer
size of the floppy drive, leading to a faster copy :-).

-- 
Henry House
OpenPGP key available from http://romana.hajhouse.org/hajhouse.asc

Attachment: pgp00008.pgp
Description: PGP signature



LinkedIn
LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
facebook
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.