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The built-in Nextor partitioning tool — FDISK
The Nextor kernel has an embedded utility for partitioning storage devices attached to Nextor device-based drivers.
The tool has a user interface based on menus, so anyone should be able to use it by just following the indications provided in the screen (when in doubt, look for an indication on what to do next in the lower line of the screen). There are however some points of interest to consider that are not mentioned in the tool itself:
- The tool allows creating up to 256 FAT12 and FAT16 partitions on any block device attached to a Nextor device-based driver. MSX-DOS drivers and Nextor drive-based drivers are not supported.
- Partitions from 100KB (the minimum supported partition size) up to 32MB will be FAT12, partitions from 33MB to 4GB (the maximum supported partition size) will be FAT16.
- Partitions of 16MB or less will have three sectors per FAT or less, therefore they can be used in MSX-DOS 1 mode.
- Partitions up to 32MB will have a MSX-DOS 2 boot sector, partitions of 33MB and more will have a standard boot sector.
- To get an optimum cluster size, it is recommended to define the partition sizes as powers of two (that is: 1M, 2M, 4M, 8M, 16M or 32M for FAT12 partitions; 64M, 128M, 256M, 512M, 1G, 2G or 4G for FAT16 partitions). If this is not possible, it is better to select the partition size as slightly smaller than the closest power of two than slightly higher (that is, for example 31M is better than 33M).
- Remember that Nextor can handle devices with FAT16 partitions and standard boot sectors; if you use a factory-partitioned device of 2GB or less you probably don't need to partition it, unless you want to create MSX-DOS 1 compatible partitions (4GB devices are usually shipped with a FAT32 partition, so you will need to partition it with FDISK anyway).
- When creating new partitions you can choose which one(s) will have the «active» flag set, thus being eligible for automatic mapping at boot time; it is also possible change the flag on already existing partitions.
- The partitioning tool works in MSX-DOS 1 mode too. Note however that the tool will always allow you to create partitions larger than 16M, which are not compatible with MSX-DOS 1.
With this tool it is not possible to add new partitions to an already partitioned device. All existing partitions must be removed before defining new partitions.
The Nextor kernel has an embedded utility for partitioning storage devices attached to Nextor device-based drivers. To start it, just invoke
_FDISKk
or
CALL FDISK
from the BASIC prompt. It works properly on both 40 columns and 80 columns mode.
Please note that starting the FDISK tool will delete the current BASIC program from memory.
Select the device driver
Nextor disk partitioning tool ---------------------------------------- 1. Sunrise IDE v.0.1.7 on slot 1-1 ESC. Exit ---------------------------------------- Select the device driver
Select driver: 1
Select the device
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 1 . OPENMSX HARD DISK ESC. Go back to driver selection screen ---------------------------------------- Select the device
Select device: 1
Select the logical unit
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) 1. Size: 100M ESC. Go back to device selection screen ---------------------------------------- Select the logical unit
Select logical unit: 1
Create partition
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Unpartitioned space available: 100M Changes are not committed until W is pressed. (No partitions found or defined) A. Add one 100M partition P. Add partition... T, Test device access ---------------------------------------- Select an option or press ESC to return
Добавить раздел фиксированного размера
По умолчанию размер раздела равен максимально доступному месту на устройстве (но меньше 4 Гб).
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Unpartitioned space available: 0K Changes are not committed until W is pressed. S. Show partitions (1 defined) D. Delete all partitions U. Undo add 100M partition W. Write partitions to disk T. Test device access ---------------------------------------- Select an option or press ESC to return
Добавление раздела с выбором его размера
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Add new partition Enter partition size in MB (1-100) or partition size in KB followed by "K" (100-32767): 20 ---------------------------------------- Enter size or press ENTER to cancel
Вводим 20
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Unpartitioned space available: 80M Changes are not committed until W is pressed. S. Show partitions (1 defined) D. Delete all partitions A. Add one 20M partition P. Add partition... U. Undo add 20M partition W. Write partitions to disk T. Test device access ---------------------------------------- Select an option or press ESC to return
Удалить все разделы
Если нажать клавишу D программа предложит подтвердить выбор:
---------------------------------------- Discard all defined partitions? (y/n) █
Если подтвердить выбор и нажать Y, то все разделы будут удалены и программа перейдёт к экрану Создание раздела
Добавить один раздел
Просмотр разделов
Nextor disk partitioning tool
----------------------------------------
One new partitions defined
* 1: FAT12, 20M
2: FAT12, 20M
----------------------------------------
ESC = return, 1-2 = toggle active (*)
- Esc Возврат на предыдущий экран
- Цифровыми клавишами выбирается номер активного раздела
Тестировать доступ к устройству
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Now reading device sector 123 ---------------------------------------- Press any key to stop...
Записать разделы на диск
Перед сохранением таблицы разделов на диск программы выдаст предупреждение от том, что все данные на нём будт уничтожены и их восстановление будет невозможно:
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Create 1 partitions on device THIS WILL DESTROY ALL DATA ON THE DEVICE!! This action can't be canceled and can't be undone Are you sure? (y/n) █ ----------------------------------------
Если подтвердить выбор и нажать Y, настройки разделов будут сохранены на диск:
Nextor disk partitioning tool
----------------------------------------
Sunrise IDE on slot 1-1
OPENMSX HARD DISK (1)
Logical unit 1, size: 100M
Creating partition 1 of 4 ...
Done!
If this device had drivers mapped to,
please reset the computer.
----------------------------------------
Press any key to return...
По нажатию любой клавиши программа покажет следующий экран:
Nextor disk partitioning tool ---------------------------------------- Sunrise IDE on slot 1-1 OPENMSX HARD DISK (1) Logical unit 1, size: 100M Changes are not committed until W is pressed. S. Show partitions (1 defined) D. Delete all partitions T. Test device access ---------------------------------------- Select an option or press ESC to return
Если Вы закончили разметку диска, то выйдите из программы и перезагрузите компьютер.
Отмена настроек
Отменить все настройки и вернуться
---------------------------------------- Discard changes and return? (y/n) █
Если подтвердить выбор и нажать Y, все настройки будут потеряны и программа перейдёт к экрану Выбор логического блока.
Отменить добавление раздела
Если нажать U произойдёт отмена создания последнего раздела.
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