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 super-floppy type products but never reached the status of a quasi-standard to replace the 3.5-inch floppy disk. It is no longer in widespread use, having been superseded by flash drive systems as well as rewritable CDs and DVDs. The Zip brand was also used for internal and external CD writers known as Zip-650 or Zip-CD.
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Overview
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 linear actuator uses the voice coil actuation technology, related to modern hard drives. The Zip disk uses smaller media (about the size of a 9 cm (3½") 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 (3½") 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. Early generation Zip drives were in direct competition with the SuperDisk or LS-120 drives, which held 20% more data and could also read standard 3½" 1.44 MB diskettes, but they had a lower data transfer rate due to lower rotational speed. The rivalry was over before the dawn of the USB era.
Interfaces
Zip drives have been made with a variety of interfaces to the computer. Internal drives have been made with ATA and SCSI interface. External drives have been made with parallel port and SCSI and (some years later) USB interfaces. 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. Eventually, USB Zip drives came to be powered from their USB connections.
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 were never 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- that is to say, over 500 times as much as a 1.44 MB standard high-density 3.5 inch floppy diskette- while at the same time boosting disk access speed.
Media
Zip media are thicker and slightly wider than 3.5" (9 cm) floppy disks. The extra thickness allows space for centrifugal force to hold the rotating disk away from its protective shell at high speeds, eliminating friction heat that limited the RPM (and therefore transfer speeds) of previous generations of magnetic media diskettes. This non-contact approach also increases the theoretical life of the media. 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. This was a measure to reduce counterfeit low cost media from undercutting Iomega's profits (as the reflective inserts were used under license). Note that higher capacity disks, 250 MB and 750 MB, do not have the same reflective spot as the 100 MB disk. Zip disks are traditionally packed in clear plastic, two-piece jewel cases similar to those used by smaller MiniDisc media. They are somewhat thinner than standard (three-piece) CD jewel cases, but still thicker than slimline CD cases. When compared to conventional floppy disks, these Zip disks feature the same 3.5 inch area, but are somewhat thicker and weigh nearly three times as much.
Compatibility
Higher capacity Zip disks must be used in a drive with at least the same capacity ability. Generally, higher capacity drives also handle lower capacity media. However, the 250 MB drive writes much more slowly to 100 MB disks than does the 100 MB drive, and it's unable to perform a long (i.e., thorough) format on a 100 MB disk. The 750 MB drive cannot write to 100 MB disks at all, though they are the cheapest and most common of the three formats. The retroreflective spot differs on the three media sizes such that if a larger disk is inserted in a smaller capacity drive, the disk is immediately ejected again without any attempt being made to access the disk.
Sales, problems, and licensing
Zip drives initially sold well after their introduction in 1994, owing to their low price point and high (for the time) capacity. The drive was initially sold for just under $200 USD with one cartridge included, and additional 100 MB cartridges for $20. At this time hard disks typically had a capacity of 500 MB and cost around $200 USD, and so backing up with Zip disks was very economical for home users. Zip drives also made significant inroads in the graphic arts market, as a cheaper alternative to the Syquest cartridge hard drive system. The price of additional cartridges swiftly dropped further over the next few years, as more companies began supplying them. Eventually, the suppliers included Fujifilm, Verbatim, and Maxell. Epson also produced a licensed 100 MB drive model with its brand name.
Sales of Zip drives and disks declined steadily from 1999 to 2003.[1] In September 1998, a class action suit was brought against Iomega over a type of Zip disk failure dubbed the click of death. Zip disks also had a relatively high cost per megabyte compared to the falling costs of CD-R and DVD±RW. The growth of hard drives to multi-gigabyte capacity made backing up with Zip disks less economical. Furthermore, the advent of inexpensive recordable CD and DVD drives for computers, as well as USB flash drives, pushed the Zip drive out of the mainstream market. However, the advantages of magnetic media over optical media and flash memory, in terms of long-term file storage stability and high erase/rewrite cycles, still affords them a niche in the data storage arena. In such applications, Zip competes primarily with USB external hard drives and the Hi-MD version of Sony's MiniDisc, which stores up to 1GB on a disk that is smaller and less expensive than a 100 MB Zip disk. In 2006, PC World rated the Zip drive as the 15th worst technology product of all time.[2] However, in 2007, PC World rated the Zip drive as the 23rd best technology product of all time.[3]
The ZipCD Drive
Iomega also produced a line of internal and external recordable CD drives under the Zip brand in the late 1990s, called the ZipCD 650. It used regular CD-R media and had no format relation to the magnetic Zip drive. The external models were installed in a Zip drive-style case, and utilised standard USB 1.1 connections. Iomega used the DirectCD software from Adaptec to allow UDF drive-letter access to CD-R or CD-RW media. The company also released their own CD-R and CD-RW media under the same ZipCD name. However, the ZipCD drives would burn to any blank CD-R or CD-RW media. Early models of ZipCD drives were rebadged Philips drives, which were also so unreliable that a class action lawsuit succeeded.[4]
Zip Disk stickers
Each Zip Drive sold included a sheet of yellow stickers used to label Zip disks with their contents. Some of the stickers were labeled with phrases such as "i am Confidential Stuff" or "i am offsite Backup", however each sheet also included one sticker with the phrase "i am the walrus" (a reference to the Beatles song I Am The Walrus). Each sticker started with the words "i am" in lower case with the "i" being shown as the Iomega logo. Other clever labels included the "i am not worthy" and the "i am full of great ideas" stickers.
Summary of Zip Disk
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- Zip drives (ZD) was introduced in 1994 by Iomega Company. They are also magnetic medium, but their data capacity is greater. Originally it was 100MB. After some years was invented ZD with a data capacity to 250 MB and then to 750 MB. Even 100MB are more then 1, 4 MB - a data capacity of the diskettes. Maximal transfer speed of ZD is 1,4 MB/s (with a date capacity of 250 MB to 2,4 MB/s).
- ZD showed up more responsible and faster then FDD. Despite of their capacity were not so popular in a market because they were robust and heavy. They never were on the same market penetration as FDD, as only some new computers were sold with Zip drives. The mainly disadvantage is that ZD’s need special mechanism in computer (not the same as in FDD!).
- We have two type of Zip’s mechanism: external, which are fixed on a face of computer (we can see the opening mechanism in a front of PC’s) and internal, which have a mechanism inside of a computer. On the one side the internal type is preferable if we are not going to transfer with a mechanism. And on the other side transferring data is faster by internal data bus then by external type.
- We can also buy ZD everywhere, but for higher price then FDD. They are still used for transferring capacious data and sometimes for archiving data in some Personal and Corporate computers.
- But the decreasing prices of CD-R and CD-RW media reduced the popularity of the ZD and anymore nobody is using them.
See also
- Jaz drive
- Iomega Pocket Zip drive
- Iomega REV
- Bernoulli Box
- Ditto drive
- LS-120 drive
- EZ 135 Drive
- Orb Drive
- SyQuest
- Click of death
References
- ^ Annual reports from corporate website:
- Iomega Corporation (2000). 2000 Annual Report to ShareholdersPDF (2.74 MiB)
- Iomega Corporation (2001). 2001 Annual Report to ShareholdersPDF (439 KiB)
- Iomega Corporation (2002). 2002 Annual Report to ShareholdersPDF (875 KiB)
- Iomega Corporation (2003). 2003 Annual Report to ShareholdersPDF (764 KiB)
- ^ PC World: The 25 Worst Tech Products of All Time
- ^ PC World: The 50 Best Tech Products of All Time
- ^ Philips and Hewlett-Packard CD Recorder Class Action
