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Начало > Каталог товаров > Устройства хранения данных > Raid - Дисковые подсистемы > Iomega Zip100 drive, 100MB, external, no PS (внешний магнитный сменный дисковод)

Raid - Дисковые подсистемы

Iomega Zip100 drive, 100MB, external, no PS (внешний магнитный сменный дисковод)

Iomega Zip100 drive, 100MB, external, no PS  (внешний магнитный сменный дисковод)

Цена: 3480 руб.

Мера: шт.
Артикул: 1980

Полное описание и характеристики товара Iomega Zip100 drive, 100MB, external, no PS (внешний магнитный сменный дисковод):
Товар поставляется под заказ при условии 100% предоплаты. Срок поставки от 2 до 8 недель. Для уточнения возможности поставки и стоимости свяжитесь, пожалуйста, с оператором

Полное описание

Iomega Zip100 drive, 100MB, external

 

 

The Zip drive is a medium-capacity removable disk storage system, introduced by Iomega in late 1994. Originally it had a capacity of 100 MB, but later versions increased this to first 250 MB and then 750 MB. The format became the most popular of the superfloppy type products but never reached the point where drives were seen almost everywhere. The zip brand was also used for an external CD writer known as the Zip-CD but despite the name this had nothing technically in common with the zip disks.

Design

The Zip system is based loosely on Iomega's earlier Bernoulli Box system; in both systems, a set of read/write heads mounted on a linear actuator flies over a rapidly spinning floppy disk mounted in a sturdy cartridge. The Zip disk uses smaller media (about the size of a 9cm (3.5") microfloppy, rather than the compact disc-sized Bernoulli media), and a simplified drive design that reduced its overall cost.

This resulted in a disk that has all of the 9 cm (3.5") floppy's convenience, but holds much more data, with performance that is much quicker than a standard floppy drive (though not directly competitive with hard drives). The original Zip drive had a data transfer rate of about 1 megabyte/second and a seek time of 28 milliseconds on average, compared to a standard 1.44 MB floppy's 500 Kbit/s (62.5 KB/s) transfer rate and several-hundred millisecond average seek time (today's average 7200 RPM desktop hard drives have average seek times of around 8.5-9 ms).

Interfaces

Zip drives have been made with a variety of interfaces to the PC. Internal drives have been made with both IDE and SCSI interfaces. External drives were first made with parallel and SCSI interfaces. USB Zip drives arrived years later. For a while, there was a drive called the Zip Plus which was supposed to be able to autodetect between parallel and SCSI, but there were lots of compatibility problems reported and the drive was later dropped. The Zip Plus drive included additional software and a smaller power adapter than the original Zip drives.

Capacity

The initial Zip system was introduced with a capacity of 100 megabytes. Plans were considered for a lower cost 25 MB version that would work in the same 100 MB drive - the idea being to bring the price of a Zip disk closer to that of an ordinary floppy - but these disks don't seem to have ever been released. The introduction of the 100 megabyte disk quickly made Zip a success and people used them to store files larger than the 1.44 MB capacity of regular floppy disks. As time went on, Iomega eventually increased the capacity to 250 and later 750 megabytes, while improving the data transfer rate and seek times.

Media

Zip media is thicker, but otherwise similar in size to 3.5" (9 cm) floppy disks, which means the drive slot is large enough to accept such a floppy. To prevent drive and disk damage, the underside of Zip media cases include a retroreflective spot in one corner. The drive mechanism will not engage if the reflective spot is not detected.
 

Compatibility

Higher capacity Zip disks must be used in a drive with at least the same capacity ability. Generally, higher capacity drives also handle all lower capacity media, although the 250 MB drive is much slower than the 100 MB one to write data on a 100 MB disk. The 750 MB drive, however, cannot write to the 100 MB media, which is the cheapest and most common.

Features and implementation

Unlike other diskette formats, the Zip's write protection is implemented on the software level instead of in the disk controller based on a signal from the drive. The metadata on the disk indicates the write protection status, which the software driver then enforces to the operating system. This means that the disk must be loaded in a drive and accessed on a computer to turn write protection on or off. It also means that, in theory, a rogue driver could be created which ignores the write protection flag.

The Zip system also introduced media access protection via a password. Like write protection, this is also implemented on the software level. One side effect of this implementation is that, on some drive models, it is possible to trick the software into allowing access to a different disk than it believes to be in the drive, thereby bypassing the password protection.

У нас Вы можете купить со склада В Москве и под заказ жесткие диски, модули памяти, процессоры, блоки питания, видеокарты и другие комплектующие для серверов и компьютеров.

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