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Top Forums UNIX for Advanced & Expert Users Command to output ones (like zero-fill), with progress indicator Post 302449791 by Corona688 on Tuesday 31st of August 2010 02:11:24 PM
Old 08-31-2010
Eight megabytes per second seems a bit slow even for a green drive, I think this can be optimized a bit.

The first dd does nothing but waste time, pipebench can read fine directly from tr. If you mean to fill the entire drive, count is redundant anyway -- dd will stop when it reaches the end. Or you could put bs and count on the final dd instead of the first.

Increasing the blocksize may make it more efficient. It doesn't need to match the drive's block size -- this isn't raw I/O.

Code:
tr '\000' '\377' < /dev/zero | pipebench | sudo dd of=/dev/wtf

It's also possible to get progress statistics from dd itself instead of using pipebench, by sending it SIGUSR1:

Code:
kill -USR1 pid

 

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CAIRO_FILL_PRESERVE(3)							 1						    CAIRO_FILL_PRESERVE(3)

CairoContext::fillPreserve - Fills and preserve the current path

       Object oriented style (method):

SYNOPSIS
public void CairoContext::fillPreserve (void ) DESCRIPTION
Procedural style: void cairo_fill_preserve (CairoContext $context) A drawing operator that fills the current path according to the current CairoFillRule, (each sub-path is implicitly closed before being filled). Unlike CairoContext::fill, CairoContext::fillPreserve (Procedural cairo_fill(3), cairo_fill_preserve(3), respectively) preserves the path within the Context. PARAMETERS
o $context - A valid CairoContext object created with CairoContext::__construct or cairo_create(3) RETURN VALUES
No value is returned. EXAMPLES
Example #1 Object oriented style <?php /* ... */ ?> The above example will output something similar to: Example #2 Procedural style <?php /* ... */ ?> The above example will output something similar to: SEE ALSO
CairoContext::setFillRule, CairoContext::fill. PHP Documentation Group CAIRO_FILL_PRESERVE(3)
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