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Early IBM disk storage.

IBM 350th

IBM 305 at the U.S. Army with the two Red River Arsenal. IBM 350 drive on the ground.

RAMAC mechanism at Computer History Museum.

IBM 350 disks first. Drive, was announced by IBM. IBM is a component of a computer system. 305 RAMAC 13th September 1956 is also very similar products, "IBM. 355 Random Access Memory" was announced for the system. IBM 650 RAMAC computer stands for "Random. Access method of accounting and control."

The design was motivated by the needs. Accounting for real-time business. 350 stored 5 million 7-bit (6 bits plus parity bits. 1 odd) characters (approximately 4.4 MB). It was fifty 24-inch (610 mm) diameter discs. 100 surface recording surface of each people. 100 min track hard disk 1200 rpm spin data transfer rate. 8800 characters per Second. Two independent arm up and down on the hard drive and select both on and off the track, select all records under the control servo. The third arm to be an option. Better models for many years. Add 1950 IBM RAMAC 305 system disk space. 350 rent for $ 3200 per month, 350 officially retired in the year. 1969th

350 of the cabinet is 60 inches (152 cm) long, 68 inches (172 cm) tall and 29 inches (74 cm) deep with strict rules that all IBM products. Companies must go beyond the standard 29.5 inches. (75 cm) plate from the door. 350 Friends are installed horizontally. This rule should be maximum diameter of the disc dictated.

Munk Currie, vice president of research for Hitachi Global Storage Technologies. (Acquired IBM's storage business.) The Wall Street Journal in an interview that unit. RAMAC ton, had to be postponed. With truck and sent through large. Cargo in accordance with Munk, can the Capacity of the drive have increased more than five megabytes. But the marketing department of IBM at the time was to drive with large capacity. Because they do not know how to sell you products with more memory.

At the 2006 Computer History Museum in Mountain View, California mechanisms RAMAC hard disk (not the same loop.) Which is under the recall.

IBM 353rd

IBM 353 with use of IBM 7030, IBM 1301, but was similar to a faster transfer rate. It has a capacity of 2097152 (221) 72 - bit word (64-bit and 8-bit data ECC) and the transfer of 125 000 words per second.

IBM 355th

IBM 355 was announced on 14th September 1956 is a popular supplement. IBM 650 used, the same mechanism with the IBM 350 and stored. 6 million 7-bit floating-point data. Transfers to and from memory. IBM 653 magnetic core IBM 650 options that only sixty words are stored. 10 digits, enough for one sector of data on disk or tape.

IBM 1405th

IBM Disk Storage Unit was announced in 1961 and 1405 is for use with IBM 1401 computer and a number of medium-sized enterprises. 1405 store 10 million characters on the same module. Each module has 25 sheets for larger yield. 50 surface recording disk. 1200 rpm spin a version of a module. There are two versions of the two modules stacked vertically. Each recording surface had 200th 5 tracks and sectors per track information that is read or stored. 22.500 Characters per second. An arm, and move on. Out and up and down. Access times in the area. 100-800 ms (version 2).

IBM 1,301th

IBM Disk Storage Unit 1301, when it was announced. 2. June 1961 has been designed for use with IBM 7000 series mainframe computers and IBM in 1410 in 1301 stores 28 million characters in the same Module. (25 million baht to 1410) for each module. 20 pages and 40 large surface area taken up with 250 titles per area with a 1301-version of a module version. 2 There are two Modules stacked vertically. Disk rotating at 1,800 rpm. The information was transferred to 90,000 characters per second.

Code is larger as the IBM 350 and 1405th IBM can separate arms and heads for the surface, moving with all the weapons and recorded together as large comb. The time frame for the arm needed to pull the head. From one of the discs and up or down to the new hard drive. Tracking is also to speed up the search because the new design. Head often has not started a few middle of the disc. On the edge of the part-time access to the highest and sank. 180 milliseconds.

The 1301 also has features for aerodynamic. Travel to the surface of the disk to a thin layer. Air must be much closer to the surface of the host to improve performance.

1301 to the computer from IBM 7631 control file format that is different. 7631 1301 may use the computer suite 1410 or 7000, or divided among them Between 7000 and 1410, or 7000.

IBM 1301 Model 1 rent for $ 2,100 per month, or they can be purchased. Price: $ 115,500 for a Class 2 or $ 3,500 per month. To buy $ 185,000 check to the IBM 7631 cost more. To buy $ 1,185 per month or $ 56,000 out of service in all models. 1970th

IBM 1302nd

IBM Disk Storage Unit was introduced in September 1302nd 1963 record more than quadrupled the capacity of the 1301 it was 117 Million 6-bit characters per module. Average access time. 165 ms and data transfer. K 180 char / sec more than doubled. Speed to reach 250 titles of 1301 two arms, and a 1301-model. 2 with a capacity of twice as high. IBM 1302 Model 1 rent for $ 5,600 per month, or may be $ 252,000 for the purchase price for the model. 2 $ 7.900 per month or $ 355,500 in sales. IBM 7631 to control costs more. $ 1,185 per month or $ 56,000 to 1302 purchase was withdrawn in February 1965.

IBM 1311th

IBM 1311 disk. - Model 2 (slave) and Model 3 (Master).

IBM 1311 disk was announced on storage at 11th October 1962, and is designed to be used. Many medium-sized companies and computer science. 1311 was about the size and Form of top-loading washing machine and stored. 2 million characters on removable disk packs. IBM 1316 disk packs, each 4 inches. (100 mm) high, weighing 10 pounds (4.5 kg). And six 14-inch (360 mm) diameter disc production. Save up to 10 surface (outer surface that is not used). = 10 R / W heads are on actuators mounted normally moves in and out, and water. camera to track screened before reading or writing. Occurred at 1500 rpm hard disks rotate. have surface of each people a record of 100 Tracks with 20 sectors per track, each sector is stored. 100 characters Seven models were introduced in 1311th They were withdrawn in 1960 in the early years. 1970th

Models of hard drives. 1311.

Do you have a trip on the IBM System 1440. IBM 1460, IBM 1240, or has control of and can be up to. Class 2, 4-drive recommended 11th October 1962 February withdraw 8, 1971.

Slave drive can no special features. That listed the primary drive. (1 drive) has recommended established in October. 11, 1962 to 6th January 1975 to withdraw.

A must ride on the IBM 1710 IBM 1620 or the possession and can control up to. 3 2 format the hard drive does not support features. Introduction 11th 12th October 1962 May Retreat. 1971st

Do a drive on the system. IBM 1401 control the possession and control. Class 2-4 drives introduced in October. 11, 1962 8. Withdrawn in February 1971.

A must ride on the IBM 1410, IBM 7010, IBM 7740, or the possession and control up to. 4 Model for Direct 2 drive comes standard on this model. Introduced 7th 12th January 1963 May retreat. 1971st

No information which may be the primary drive. (1 drive), introduced 5th March 1968 February withdrawn. 2, 1971.

It are no existing data can be the primary drive. (1 drive), introduced 5th March 1968 February withdrawn. 2, 1971.

The feature is optional.

Direct method: This option does not respond for each track, the first zero.

Scandisk: Automatic search for a specific speed or condition.

We Overlay: allows you to find a way to overlap. ONE try and the number of read or write any other

Track Record: Increased capacity of the hard disk by a series of the track rather than a large region.

Drive 1 (the primary drive models 1, 3,. 4 and 5) is wider than the other foot Drives. Other (slave drive: 2 format) to have extra generator and logic control

IBM 1316 disk packs with plastic shell and the bottom covered when not. Lift the top management in the middle of the lid is rotated to cover the bottom release. From the top of the model 1311-drive and open the plastic shell fell into the open drive. (Assuming it was empty). Management has again to be fixed on the plate and let you remove the plastic shell and the drive cover open. Process will take back to the disk set.

IBM 2311th

IBM 2311-memory with six. Plates with

IBM 2311 Direct Access Storage devices have been known for years. 1964 for use throughout the series. System/360, it is also on the IBM 1130 and available (with the Control Unit 2841) 1800 IBM 2311 is largely the same mechanisms. 1311, but the improvement of recording allows high-density data. 2311 7250000 bytes stored on a single disk pack. IBM 1316 (the same type used in the IBM 1311). The shell consists of six rotating as a unit. Surface of a every person have a record of 200 Songs plus 3 tracks options that can be used as an alternative in case tracks discovered the error. Find the average duration is 85 ms Data transfer rate. 156 KB per second.

2311, with 10 individual R / W is on the drive head is usually single and Extension and hydraulics installed. to pursue screened camera before reading or writing is. has set 2311 tanks, tracks and recording (was tank, based on all surfaces the same in each lane of 5 plates. Incorporated) 0 are reserved for the period.

2311, because it is. To use a variety of product lines be used within the computer. 360, electrical connection of the standard. Opportunities for other vendors of plug-compatible hard drives for sale. Drive for use with IBM computers and the entire industry.

IBM 2314/2319.

IBM Disk Access 2314 store locations have been proposed. 22. April 1965, a year later, after the introduction. System/360, it is with System/360 and wires are used. System/370 switch has two channels, can connect to. 360/370 2314 two-channel access mechanism is similar to the hard disk. In 2311 but allowed high-density recording improved. Archive 2314 29.176 million mark packed (200 207 294. bytes per lane) on a single hard disk. IBM 2316, which developed to a great 1316, but as a consequence of increasing the number of disks from 6-11 pack eleven 2316-disk-size 14-inch (360 mm) disk of size 20 to a surface of the recording. Access to drives of 20 cases, R / W, was the installer. Drives usually moves in and out, and water. said detent on the desired track before reading or writing occurs. Each recording surface had 200th Track access time began. 2311 model with faster, but later due to the adjustment that occurred in the hydraulic drive. Data transfer rate of up to two times. 310 kB / s.

1 contains the original version of the controller. 2314, 2312 module drives one and two. 2313 four-module for all drives. 9 disk drive operates from eight of nine. Available for users at any one time. Drive that was reserved for nine to the user and also in "offline" work by the field engineer another Drive. While the other is in use by customers. Each of the nine drives in a drawer that was installed. unlocked and removed to access the disc. Due to the nature they pack, they took the name "pizza oven".

New models 2314, except for: 2314 model built with a combination of 1-9 2314 2319 B drives with hard drives in three. Six-and nine-drive model 2844 control unit can be added to the 2314 control unit is allowed access. S/360 two channels simultaneously on two separate hard disk storage.

IBM 2310th

IBM 2310 cartridge drive, it was announced a year. IBM 1800 and 1964 and then in 1965 with IBM 1130; should be sent later. It can 512 000 1130 1965 words (1.024 million bytes) to to save the IBM 2315 cartridge. Single 14-inch (360 mm) discs, aluminum-coated plastic shell with a spin in the opening reading of read / write head and two arms.

IBM 2321st

IBM 2321 Data Cell was announced in April. 1964 as the IBM System/360 2321 up to ten removable and interchangeable data cell. Format of the address bar 200 of magnetic tape media that are fundamental. Total capacity of 400 million bytes or 800 million less than eight figures. 2321s can be connected to an IBM control unit. 2841, a total capacity of more than 3 GB of reporting cell to 23 gallons of oil. It was a successful Device. - Not to vote for the motion of complex mechanical equipment, read, and will stand again. Bar, am.

Compared to contemporary Disk Device IBM 2311, IBM 2321-unit tries to keep the cell data. 55 only during the period. 6 slow (85 ms access time 500 ms, respectively). A fully loaded IBM 2841 control unit with eight IBM 2321 data cell must be equipped and cash equivalents of Disk 441 IBM 2311-unit with 56 IBM 2841 control unit.

Uses data cells. Three systems work together to find a separation; Servo - Hydraulic is the role am to subcell appropriate driver and two solenoid valves, a tab bar to the right. 10 in the subcell, and the other to select one. 5 captain's armband for the head element. 20 (110 tracks per tape).

Since storage media is a band many people do not think about 2321 disk system, but IBM operating system. 360 addressed 2321 Rotating storage devices, direct access, as Drives are available. 6 - B of the form for the first 0BBSCH. B is zero and the remaining bytes. Bin (cells, IE), Bin, Strip, and the cylinder head.

2321 is known. humorously as "noodle options of magnetic, removable and flexible as a noodle lasagna.

IBM 3330th

200 removable disk pack without cover. MB Prevention.

IBM 3330 Direct Access Storage Facility, code-named Merlin. Adopted in June 1970 for use with IBM System/370 and IBM 360/195, it packs instead of a removable disk. 100 MB (404x19x13, 030 bytes) (1973 version 11 recommended IBM Disk Pack 3336 is held. 200 MB (808x19x13, 030 bytes)) access time is 30 ms and data transfer at 806 KB / s recommended by the main code 3330 using the modified error the. Drive, reliable and inexpensive, because it is not completely reduced in the small surface of the disk can be stable. Circuit explosive correct errors up to. 11 bits in length, was withdrawn in 3330th 1983rd

IBM 3340th

IBM 3340 Direct Access Storage Facility, the code-name. Winchester was March, 1973 for use with IBM System/370 known sealed removable disk packs, and it included the head and arms. None in the process of recording cover removed. Access times as 25 ms and data transfer 885 kB / s third-generation removable IBM Data module. 3348 was one in a capacity sold 35 MB, the other with 70 MB. The three have also 70 MB, but fixed with 500 KB in a separate category for faster access. 3340 is also used to correct errors. It was removed in 1984.

3340 is a development in San Jose under the leadership of Ken. Haughton at the beginning of the draft was on two removable Modules focused. 30 MB because of the configuration. 30/30 is code-named Winchester was selected. After the famous rifle. Winchester 30-30 However, the increase in capacity Insert the code-name.

The importance of these products and reasons for the hard drive is commonly known as "technology. Winchester "Had nothing to do with the configuration of the product. This drive is in the first quarter earnings will not be discharged. Winchester head of media and head are allowed, the country and from use the media disk, the disk is rotating up and down. Result of very significant savings and greatly reduced. The complexity of the head and arms. Operating mechanism is quickly becoming a standard design within the community, and disc replicators.

IBM 3350th

IBM 3350 Direct Access Storage Facility, with a code that is known in Madrid. 1975 for use with the IBM System/370 hard disk, a removable non-packs. Were sealed and contain the head and arm assembly. 3350 Bin 555 is a plate geometry, 30 head. And 19 069 bytes per track on its head. Disk Assembly (HDA) unit capacity of 317 498 850 bytes. Disk is referred to as A2, A2F, B2, C2 B2F, C2F, and each unit has two HDAs and they have installed in the "line" of the device. correct Unit A2, or A2F and To secure "control" How, in 3880 IBM to A2. 3 Unit 2 B2S B2 and C2 or C2 units can also be connected to the control unit and in the second position be. I / O can be done simultaneously with strings. Unit x2f "x2 is normal, but both devices. HDAs has "fixed. Head" area than the first. 5-cylinder, this area would have a great goal. To the HASP or areas are allocated. JES2 so much to reduce head movement on the device. In the background of a photograph of a string. A2/B2/B2 3350 IBM 3066 console is used with IBM 370/165. And 370/168 computers.

IBM 3370 and 3375th

IBM, the IBM 3370th Equipment on direct access in January saved. For 1979 for IBM 4331, 4341 and System/38. Intermediate computer, it would have seven 14-inch wheels (360 mm), and in each unit of capacity 571 MB hard drive, it is the first thin-film head technology research in technologies, the late Thomas J. Watson Research at the Start Center in the Decades. 1960 3370 is a fixed block architecture. My sister is a 3375-unit and the main information architecture.

IBM 3380th

IBM 3380 disk drive module.

IBM 3380 Direct Access Storage Device was introduced in June. 1980, it uses new technology and the scalp. Capacity of 2.52 gigabytes of data transfer rate of 3 megabytes per second. Average access time. 16 ms of the purchase price at any time since its introduction. $ 81,000 to $ 142,200, because the problem was. The first unit in October, Schiff. 1981st

IBM 3390th

IBM 3390 series storage devices, was introduced direct access in November. 1989, offer up to storage. 22 GB drive in the line of the many other costs of storage at different configurations. And is optimized under $ 90,000 and $ 795,000 3 format to drive the family. Announced 11th September 1991, increased capacity of about version 1.5 and 9, gave the family. 20. May 1993, further increasing production capacity by additional factors. 3 to a minimum 34-GB drives in a single box.

3390 9 Latest single large expensive. Disk (sometimes referred to as SLED) and then head for IBM.

Floppy drive.

See also: History of the disk.

Another important innovation of the IBM disk. IBM first introduced driving 8-inch disk. Drive load in 1971 and a read-only device. In 1973, IBM delivered the first reading. Reading / writing the hard disk, floppy drive as part of a system of data entry. In 3740 IBM set the standard early. 8 "-drive, floppy drive, but not always, these products sell separately from the industry, the developed separately from IBM.

Disk storage in 2004.

IBM sold the operation of hard disks to Hitachi in 2002 for comparison. Hitachi Deskstar 7K250 hard disk is stored on the PC. 250 000 000 000 bytes (250 GB) in three sizes. 3.5 inch (90 mm) diameter rotating disk at 7200 rpm, it has a sustained transfer rate of an average of 61.4 million bytes per second than the bus. Serial ATA is my time. 8.5 ms, weighs 640 grams (1.4 pounds) and the hard disk. 3.5 inches, it is about as long as the disk management pack. IBM 1316 retail prices in April. 2006, about 100 U.S. dollars.

To see.

History of the hard drive.

List of IBM storage products, magnetic disk

References.

^ "Events CHM HDD: IBM 350 RAMAC" Search http://chmhdd.wetpaint.com/page/IBM+350+RAMAC. 05/22/2009.

^ IBM RAMAC promotional film.

^ IBM 350 disk storage unit.

Lee Gomes ^ "Talking Tech" Wall. Street Journal, 22 สิงหาคม 2006th

^ IBM Stretch (aka IBM 7030 Data Processing System).

^ IBM 355 disk storage unit.

^ Disk space. IBM 1405th

^ IBM in history. 1301.

^ Collected IBM 1311 disk drive (PDF).

^ IBM 1800 data acquisition and control. IBM Storage State 30th November 1964.

^ IBM conducted a small effective 11th February 1965.

^ IBM Archives - 2321 cell volumes.

AB ^ IBM System Reference Library, IBM System/360 Component Description, A26 - 5988th Form.

^ "IBM 3340 Storage done directly." IBM http://www-03.ibm.com/ibm/history/exhibits/storage/storage_3340.html Accessed 01/21/2009.

http://www-03.ibm.com/ibm/history/exhibits/storage/storage_3370.html ^.

http://www.ibm.com/ibm/history/exhibits/storage/storage_3380.html. ^.

^ IBM Archives agree: 1994 Disk / Trend Report. Hard disk space for the family.

http://www.internetnews.com/infra/article.php/1183321 ^.

External links.

Table that A link to the article, IBM has hard drives.

Magnetic disk Heritage Center.

IBM Disk Files 350 RAMAC.

Quarter-century Innovative file. Disk IBM Journal of Research and Development, 1981 (PDF).

IBM 1311 Science Center and Technology Museum of Thessaloniki.

50. Anniversary: IBM 305 and IBM 350 RAMAC disk storage unit press 50th

EE Times: Hard drive will spin an important milestone.

Yoshiro Nakamatsu and floppy disks.

IBM disk storage in the document. bitsavers.org (PDF).

IBM 1311 disk drive.

IBM 2314 Direct Access Storage.

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