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Кай, если честно, я знал что будет всего лишь один ответ, причем именно ваш
Огромное спасибо, теперь все стало ясно хоть и сомневаюсь, что такие диски смогу найти в России!
Да, мне чтобы запулучить такой диск с e-bay, придется продать- целиком рабочую ЕС-1841
Но все-же согласитесь, находка очень интересная "оптика 5.25, видимо кроме Maxtor такое никто не практиковал!

Всем спасибо...

Время от времени буду поглядывать на e-bay, в поисках такого диска, но подешевле.

PS. Кай, у меня появились такие же касеты для стримера "3M", но уже 150mb, такие имеете в своем арсенале?

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Например ATG GM9001/5 - worm optical. 12 дюймовый, 10.2 ГБ

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Был схожий диск от SONY в половину объема- 5гб на "молотке", вроде 5000 руб хотел продавец.

Yuri, на Ваших фото магнитооптические 5,25" диски различного объёма, кои, в принципе, дефицитными не являются.

ТС же пишет об оптическом накопителе и уникальных дисках для него.

разницу опишу, но по-английски:

WORM drives
A large number of technologies have been introduced to provide storage of large amounts of information on optical platters with varying degrees of flexibility.
The earliest were called WORM (Write Once Read Many) drives. Writing resulted in an irreversible change in an information layer. Thus, data could be written but not erased and rewritten (though just erasing a block might be possible). Heating with the writing laser beam resulted in damage (ablating) of a coating. Reading is similar to that used for CDs and other optical technologies.

Typical capacity was 650 MB per side. Disks could be one sided or two sided.

This is somewhat similar to the technology used in CD-R drives though many variations have been developed which vary mostly in the details.

Unlike CDs, MDs, and LDs, these optical discs are formatted more like hard drives or diskettes with circular (not spiral) tracks and fixed sectors - some of which are visible to the naked eye since they are physically etched on the disk itself.

The laser power for WORM drives is typically higher than for read-only drives when in writing mode - likely in the 10s of mW range. 30 mW is one number I have heard. Modern drives all use IR emitting laser diodes.

The basic mechanism and optical pickup is similar to that of a CD including the techniques used for beam generation, focusing, and tracking. However:

These usually spin at high speed - 3,600 RPM typical - so spindle motors and other mechanical components are more robust.

Laser power can be switched between a fraction of a mW for reading and high power for writing (in addition to off). WARNING: IR, invisible, Class IIIB, dangerous!


Magneto-optical drives

Most modern optical drives use magneto-optical techniques in some ways similar to the MiniDisc. However, unlike the MD, the laser beam is switched at high speed to alter the magnetic properties of the coating and a write cycle is usually a two step process:
Energize the bias coil with the '0' polarity (e.g., N).

Erase a block by turning on the laser as that area of the disk passes under the pickup.

Reverse the polarity of the bias field to that of a '1' (e.g., S).

On the next revolution, write the information by selectively heating only those regions destined to become '1's in the stored pattern.
The laser power for MO drives is typically higher than for read-only drives and likely in the 10s of mW range. Modern drives all use IR emitting laser diodes.
The media is usually enclosed in a cartridge for protection with a door that opens automatically when inserted into the drive. Capacity is typically 650 MB per side for a 5-1/4" disk.

Additional components will be present to detect the magneto-optic Kerr effect for playback of MO recordings.

These usually spin at high speed - 3,600 RPM typical - so spindle motors and other mechanical components are more robust.

Laser power can be switched between a fraction of a mW for reading and high power for writing (in addition to off). WARNING: IR, invisible, Class IIIB, dangerous!

The bias coil is opposite the lens and may block access for servicing unless removed.

Вопрос: Есть диски Iomega Laser Safe.
На них написано перезаписываемый оптический диск.
Это оптика или все-же магнитооптика?
Спасибо.