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(Created page with "Обычно MBR и BIOS (MBR + BIOS), а также GPT и UEFI (GPT + UEFI) идут рука об руку. Это обязательно для одних систем (н...") |
(Created page with "Одной из необычных функций gdisk является способность читать таблицу разделов MBR или метку диска B...") |
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С сайта http://www.rodsbooks.com/gdisk/mbr2gpt.html | С сайта http://www.rodsbooks.com/gdisk/mbr2gpt.html | ||
Одной из необычных функций gdisk является способность читать таблицу разделов MBR или метку диска BSD и преобразовывать ее в формат GPT без повреждения содержимого разделов на диске. Эта возможность существует для перехода на GPT в том случае, если ограничения MBR или BSD-дискмаркировки становятся слишком обременительными - например, если вы хотите добавить несколько ОС в мультизагрузочную конфигурацию, но для этих ОС требуется слишком много первичных разделов, чтобы поместиться на MBR-диске. | |||
Conversions from MBR to GPT works because of inefficiencies in the MBR partitioning scheme. On an MBR disk, the bulk of the first cylinder of the disk goes unused—only the first sector (which holds the MBR itself) is used. Depending on the disk's CHS geometry, this first cylinder is likely to be sufficient space to store the GPT header and partition table. Likewise, space is likely to go unused at the end of the disk because the cylinder (as seen by the BIOS and whatever tool originally partitioned the disk) will be incomplete, so the last few sectors will go unused. This leaves space for the backup GPT header and partition table. (Disks partitioned with 1 MiB alignment sometimes leave no gaps at the end of the disk, which can prevent conversion to GPT format—at least, unless you delete or resize the final partition.) | Conversions from MBR to GPT works because of inefficiencies in the MBR partitioning scheme. On an MBR disk, the bulk of the first cylinder of the disk goes unused—only the first sector (which holds the MBR itself) is used. Depending on the disk's CHS geometry, this first cylinder is likely to be sufficient space to store the GPT header and partition table. Likewise, space is likely to go unused at the end of the disk because the cylinder (as seen by the BIOS and whatever tool originally partitioned the disk) will be incomplete, so the last few sectors will go unused. This leaves space for the backup GPT header and partition table. (Disks partitioned with 1 MiB alignment sometimes leave no gaps at the end of the disk, which can prevent conversion to GPT format—at least, unless you delete or resize the final partition.) |