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The case for the /usr merge

The case for the /usr merge

Posted Jan 30, 2012 1:44 UTC (Mon) by slashdot (guest, #22014)
In reply to: The case for the /usr merge by jimparis
Parent article: The case for the /usr merge

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The current 48-bit LBA scheme, introduced in 2003 with ATA-6 standard, allows addressing up to 128 PiB. Current PC-Compatible computers support INT 13H Extensions, which use 64-bit structures for LBA addressing and should encompass any future extension of LBA addressing, though modern operating systems implement direct disk access and do not use the BIOS subsystems, except at boot load time. However, the common DOS style Master boot record partition table only supports disk partitions up to 2 TiB in size. For large partitions this needs to be replaced by another scheme for instance the GUID Partition Table which has the same 64-bit limit as the current INT 13H Extensions.
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The limit is in the MBR format and/or BIOS implementation.


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