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Full Discussion: sed or awk editing help
Top Forums Shell Programming and Scripting sed or awk editing help Post 302468414 by DGPickett on Tuesday 2nd of November 2010 04:21:13 PM
Old 11-02-2010
Hey, I love mmap(), and mmap64() more, a golden door into unlimited VM and RAM use and random access to application data. But sed is all about the (expandable) microcosm of two lines. The early small buffer sed activity fit in the small L1 caches of earlier days. I rarely nit pick below the bit level -- the pixel, maybe, but not the bit! It is about seeing all the choices, weighing all the choices, and making informed choices, investing in knowing the right technique for the next time, investing in yourself, investing in your new friends.
 

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LEARN ABOUT NETBSD

mmcformat

MMCFORMAT(8)						    BSD System Manager's Manual 					      MMCFORMAT(8)

NAME

     mmcformat -- format optical media

SYNOPSIS

     mmcformat [-BDFGHhIMOpRrSsw] [-b blockingnr] [-c cert-num] special

DESCRIPTION

     The mmcformat utility formats optical media conforming to the MMC standard.  This includes CD, DVD, and Blu-Ray (BD) media.

     The options are as follows:

     -B 	      Blank media when possible before formatting it.

     -b blockingnr    Explicitly select packet size in sectors (for CD-RW only).  It is not recommended to change this from its default of 32.

     -c cert-num      Certify media for DVD-RAM / DV-RE.  The argument cert-num specifies:

			    0		  no certification

			    1		  full certification

			    2		  quick certification

     -D 	      Debug mode.  Print all SCSI/ATAPI command errors.

     -F 	      Format media.

     -G 	      Grow last CD-RW/DVD-RW session.

     -H 	      Show help and print formatting choices for the inserted media.

     -h 	      Show help and print formatting choices for the inserted media.

     -I 	      Show help and print formatting choices for the inserted media.

     -M 	      Select MRW (Mount Rainier) error correcting background format.

     -O 	      Old style CD-RW formatting; recommended for CD-RW.

     -p 	      Explicitly set packet format.

     -R 	      Restart previously stopped MCD-MRW or DVD+RW background format.

     -r 	      Recompile defect list for DVD-RAM.

     -S 	      Grow spare space DVD-RAM / BD-RE.

     -s 	      Format DVD+MRW / BD-RE with extra spare space.

     -w 	      Wait until completion of background format.

NOTES

     Due to the enormous varieties in optical media, mmcformat is made as generic as possible.	This can result in confusion.

EXAMPLES

	   mmcformat -B -O /dev/rcd0d

     Blanks and then formats a CD-RW disc using the ``old style'' format command.  It is recommended to use this ``old style'' command unless your
     drive reports that it's not supported; in that case, resort to the default -F.  Note that a CD-RW disc can be reformatted without being
     blanked.  Blanking switches between sequential and fixed packet writing by erasing the disc.  This can also help to revive old discs.

	   mmcformat -F -M /dev/rcd0d

     Format a CD-RW or a DVD+RW to use MRW (Mount Rainier).  This format tries to hide media flaws as much as possible by relocation.

SEE ALSO

     scsictl(8)

HISTORY

     The mmcformat command first appeared in NetBSD 5.0.

AUTHORS

     Reinoud Zandijk <reinoud@NetBSD.org>

BUGS

     mmcformat could be merged with scsictl(8) but that tool is very hard disk oriented.

BSD
								    May 9, 2008 							       BSD
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