Tag Archives: Floppy drive

Floppy 3 Mode Support - The BIOS Optimization Guide

Floppy 3 Mode Support – The BIOS Optimization Guide

Floppy 3 Mode Support - The BIOS Optimization Guide

Floppy 3 Mode Support

Common Options : Disabled, Drive A, Drive B, Both

 

Quick Review

For reasons best known to the Japanese, their computers come with special 3 mode 3.5″ floppy drives. While physically similar to the standard 3.5″ floppy drives used by the rest of the world, these 3 mode floppy drives differ in the disk formats they support.

Unlike normal floppy drives, 3 mode floppy drives support three different floppy disk formats – 1.44 MB, 1.2 MB and 720 KB. Hence, their name. They allow the system to support the Japanese 1.2 MB floppy disk format, as well as the standard 1.44 MB and 720 KB (obsolete) disk formats.

If you own a 3 mode floppy drive and need to use the Japanese 1.2 MB disk format, you must enable this feature by selecting either Drive A, Drive B or Both (if you have two 3 mode floppy drives). Otherwise, your 3 mode floppy drive won’t be able to read the special 1.2 MB format properly.

However, if you only have a standard floppy drive, you must disable the Floppy 3 Mode Support feature or your floppy drive may not function properly.

 

Details

For reasons best known to the Japanese, their computers come with special 3 mode 3.5″ floppy drives. While physically similar to the standard 3.5″ floppy drives used by the rest of the world, these 3 mode floppy drives differ in the disk formats they support.

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Unlike normal floppy drives, 3 mode floppy drives support three different floppy disk formats – 1.44 MB, 1.2 MB and 720 KB. Hence, their name. They allow the system to support the Japanese 1.2 MB floppy disk format, as well as the standard 1.44 MB and 720 KB (obsolete) disk formats.

If you own a 3 mode floppy drive and need to use the Japanese 1.2 MB disk format, you must enable this feature by selecting either Drive A, Drive B or Both (if you have two 3 mode floppy drives). Otherwise, your 3 mode floppy drive won’t be able to read the special 1.2 MB format properly.

However, if you only have a standard floppy drive, you must disable the Floppy 3 Mode Support feature or your floppy drive may not function properly.

 

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ARMD Emulation Type – BIOS Optimization Guide

ARMD Emulation Type

Common Options : Auto, Floppy, Hard Disk Drive

 

Quick Review

ARMD is actually short for ATAPI Removable Media Device. It refers to devices that use removable media. Examples include the LS-120, Magneto-Optical (MO) and Zip drives.

To boot up any operating system from these drives, it is essential for them to emulate a floppy drive or a hard disk drive. This is especially true for older operating systems like DOS.

This BIOS feature allows you to select the type of emulation used during the boot sequence.

When set to Auto, the BIOS automatically sets the emulation type used by ARMD drives.

When set to Floppy, ARMD drives will emulate a floppy drive at boot up.

When set to Hard Disk Drive, the ARMD will emulate a hard disk drive at boot up.

To be safe, this BIOS feature should be set to Floppy. It is the safest emulation type, and the one that most accurately describes ARMD drives. They are, after all, more like large-capacity floppy drives than hard disk drives.

 

Details

ARMD is actually short for ATAPI Removable Media Device. It refers to devices that use removable media. Examples include the LS-120, Magneto-Optical (MO) and Zip drives.

To boot up any operating system from these drives, it is essential for them to emulate a floppy drive or a hard disk drive. This is especially true for older operating systems like DOS.

This BIOS feature allows you to select the type of emulation used during the boot sequence.

When set to Auto, the BIOS automatically sets the emulation type used by ARMD drives.

When set to Floppy, ARMD drives will emulate a floppy drive at boot up.

When set to Hard Disk Drive, the ARMD will emulate a hard disk drive at boot up.

Emulating the hard disk drive may provide better performance, if the operating system supports a disk cache. However, that may introduce data synchronization problems should you eject the media before the disk cache has a chance to write to the media.

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Emulating a floppy drive does not normally present with this problem. Only reads from floppy drives are normally cached, thereby avoiding this problem. In addition, certain operating systems (e.g. Windows XP) will only load drivers from a floppy drive during the installation process.

If you desire better performance, you should set this BIOS feature to Hard Disk Drive. However, you must treat the device like a hard disk drive and refrain from ejecting the media unless you are sure the cached data has been written to it.

To be safe, this BIOS feature should be set to Floppy. It is the safest emulation type, and the one that most accurately describes ARMD drives. They are, after all, more like large-capacity floppy drives than hard disk drives.

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