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Full Discussion: Disk Paritioning Scheme--GPT or MBR
Operating Systems Linux Fedora Disk Paritioning Scheme--GPT or MBR Post 302704087 by Lem on Friday 21st of September 2012 03:13:43 AM
Old 09-21-2012
Quote:
Originally Posted by fpmurphy
MBR partitions can be greater than 2Gb. GPT is required when your disk is greater than approx 2Tb and using 512 sector sizes.
Of course, it was a typo: I meant 2TB. Smilie

In MBR every partition is defined by its starting sector and its size in sectors. Both values are limited to 32 bits. So a partition max size, as well as its farthest possible starting point, is:
(2^32-1) x 512 = 2,199,023,255,040 bytes.

This means that you can use a MBR for two 1.5TB partitions in a 3TB disk, for instance. On the same disk you can't use MBR for a single 3TB partition, nor for four 750GB partitions, nor for two partitions of 0.5TB and 2.5TB ...

Today even disks having 4kB sectors show to the system virtual sectors of 512B. So the disk sector real size doesn't affect the 2TB limit.
--
Bye
 

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LEARN ABOUT DEBIAN

gpt-postinstall

GPT-POSTINSTALL(8)					User Contributed Perl Documentation					GPT-POSTINSTALL(8)

NAME

       gpt-postinstall - Searches for post install scripts and executes them

SYNOPSIS

	 gpt-postinstall [-help -force -version -man -location ]

DESCRIPTION

       gpt-postinstall Searches an installation for post-install scripts that have not been run yet and executes them.	These scripts are
       installed by Setup packages and are designed to localize an installation. The -force flag can be used to re-run all of the setup scripts.

OPTIONS

       -force  forces all action to be taken, regardless of state.

       -help   Print a brief help message and exits.

       -man    Prints the manual page and exits.

       -version
	       Prints the version of GPT and exits.

       -location
	       Location indicates the path to the Globus installation that will be used.

SEE ALSO

       gpt-install(1) gpt-uninstall(1) gpt-verify(1)

AUTHOR

       Michael Bletzinger <mbletzin.ncsa.uiuc.edu> and Eric Blau <eblau.ncsa.uiuc.edu>

perl v5.14.2							    2012-04-30							GPT-POSTINSTALL(8)
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