http://www.cwhdallas.com/rll-hard/
Rll Hard
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MFM Hard Drive Kyocera KC-30B RLL MFM IBM PC/XT vintage |  |
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US $176.20 | 29d 13h 13m |
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4pc MFM/RLL Single Hard Drive & Diskette Internal Cable | |
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US $9.95 | 26d 21h 55m |
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Hard Drive: PRIAM: ID230-RC 244MB 5.25"/FH RLL ST412 Vintage | |
0 Bid | US $85.00 | 6d 18h 23m |
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Data Tech 5187 AT 286 386 486 RLL 16-bit ISA hard disk drive controller DTC5187 | |
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US $149.95 | 27d 1h 47m |
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NEW SEAGATE ST11M ST11R XT Hard Drive Card MFM RLL | |
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US $119.95 | 25d 45m |
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NEW RLL Hard Floppy Controller 16 bit ISA DTC7287 | |
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US $39.00 | 24d 20h |
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IBM PC/XT 8-bit ISA Seagate ST11R RLL Hard Drive Contr | |
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US $126.03 | 23d 14h 9m |
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SEAGATE ST11R PC XT 8 bit Hard Drive RLL Controller 1.5 | |
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US $99.95 | 23d 8h 22m |
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SEAGATE ST11R PC XT 8 bit Hard Drive RLL Controller 1.7 | |
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US $89.95 | 23d 8h 16m |
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DTC 5150 MFM RLL Hard Drive Control Card ISA - 1986 | |
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US $200.00 | 22d 6h 33m |
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EVEREX IBM PC XT AT RLL Hard drive controller card 8 bit ISA st412 | |
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US $44.99 | 21d 4h 49m |
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WD WD1002A-27X RLL Hard Disk IBM PC/XT 8-bit ISA Card Vintage | |
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US $139.99 | 18d 17h 35m |
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HP 42MB IDE AT HARD DRIVE HALF HEIGHT 17 RLL 3.5 - D1665-60007 | |
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US $235.30 | 16d 5m |
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Vintage Kalok MFM or RLL Hard Drive + Controller Card Parts or Repair No Reserve | |
0 Bid | US $19.95 | 6d 19h 11m |
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Western Digital Caviar Green 1.5 TB SATA 3.0 GB-s 32 MB Cache 3.5-Inch Internal Retail Kit Drives List Price: $129.99 Sale Price: $145.00  |
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Western Digital Caviar Green WDBAAY0015HNC-NRSN 1.50 TB Internal Hard Drive - Retail WDBAAY0015HNC-NRSN 1036 |
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Razer RC21-00340101-R3U1 15 Inch Laptop Bag Transformers 3 Optimus Prime List Price: $49.99 Sale Price: $46.33 |
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15"" LAPTOP CASE - TF3 OPTIMUS PRIME (COMPUTER ACCESSORIES) |
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QVS MFM/RLL Single Hard Drive & Diskette Internal Flat Ribbon Cable Kit List Price: $3.90 Sale Price: $4.50 |
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Connects one internal MFM/RLL hard drive and two 3.5inch floppy drives. This 3pc set of cables has PVC coated wiring to allow maximum speed. |
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Body Armor for iPhone 3G / 3GS - Green & White List Price: $29.99 Sale Price: $0.50 |
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This is the ultimate iPhone 3G / 3GS protector. It is a hard plastic case wrapped in a smooth silicone with a screen protector included. |
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Fire Skull Hard Case Cover for Motorola Droid A855 Sale Price: $0.86 |
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Protect and Personalize your Motorola Droid A855 with style Protector Case. Premium Quality Cover. Provides ultimate protection from scratches and its perfect mold keeps the phone trim and trendy. Reinforced with hard plastic to the sides to ensure the durability of the case. Precise openings on the protector case to allow access to all controls and features on the phone. Packed in high quality poly bag packing. Suitable for Samsung Replenish M580. The packing is subject to change without notice. Package Contents One BRAND NEW Cover Faceplate Case. No Belt Clip is included for this case. Please note that the color of the item in the picture may appear different based on the viewer's monitor color range and settings. Phone is not included. The phone in the picture is to show how this case holds your phone. |
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Rolls CL151 Microphone Preamp Compressor and Gate List Price: $130.00 Sale Price: $83.99 |
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Designed for connecting studio mics to the inputs of Hard Disc Recorders, the Rolls CL151 has all the input stage processing power you need and an unbalanced 1/4 inch line level output. The CL151 is, however, a very versatile processor and can be used in any application where you need single channel mic or line level input processing. The CL151 features a single channel mic preamp with both balanced XLR and unbalanced 1/4 inch inputs, switchable phantom power, a noise gate, a soft-knee compressor/limiter with Threshold, Ratio, and Output controls, Gate and Gain Reduction LEDs, and operates on the supplied AC adapter. |
Qic Tape Technology
The Quarter Inch Cartridge tape is basically a magnetic tape technology which was brought in by 3M in the year nineteen seventy two. The width of the QIC tape is one quarter inch and the length is between three hundred and fifteen hundred feet. The Quarter Inch Cartridge (QIC) tape writes the data in a mode which is known as the serpentine mode. In this mode the tracks in the QIC tape change their direction by switching their heads. The Quarter Inch Cartridge (QIC) tape has been widely used right from its release and it has also made many changes in its format. The Quarter Inch Cartridge (QIC) tape standards are published by the trade association of QIC. This association also includes the logical formats and interfaces of QIC technology. The QIC tape uses the technique of linear recording. The Quarter Inch Cartridge (QIC) tape differs from the other data tape cartridges because it consists of a drive belt that moves at an even speed with a capstan which is motorized. As the belt is in connection with the QIC tape, the assurance of the speed and accuracy of the tape is maintained.
The design of the Quarter Inch Cartridge (QIC) tape is a solid one which includes a base plate of aluminum and a strong plastic cover. The QIC is one of the most widely used data tape around the world. The Quarter Inch Cartridge (QIC) tape holds a positive reputation in storing the data safely. The QIC tape has a great capacity of storing data. The QIC DC6250 tapes have a storage capacity between fifty megabytes to two hundred and fifty megabytes. The QIC DC6525 tape can store data up to five hundred and twenty five megabytes. The Quarter Inch Cartridge (QIC) DC9120 tape has a storage capacity of one point two gigabytes. The storage capacity of QIC DC9135 is one point three five gigabytes and the length of its tape is seven hundred and sixty feet. The Quarter Inch Cartridge (QIC) DC9200 tape has got an increased data storing capacity of two gigabytes and its length is nine hundred and fifty feet. The Quarter Inch Cartridge (QIC) DC9250 tape can store data up to two point five gigabytes and its length is twelve hundred feet. Tape4backup.com provides the premium quality of the Quarter Inch Cartridge (QIC) tape.
In the Quarter Inch Cartridge (QIC) tape the data is stored in tracks. There are two methods which are specifically used by the QIC tape for encoding the data; these are RLL method and MFM. These methods are also used by the hard drives to encode the data. The Erase head is used by the QIC tape which has the ability to erase the complete width the tape in only one pass. QIC tape also contains a longitudinal read and write head which is also found in the cassette recorders. By this the QIC tape is able to verify the data while it is being written on it. The Quarter Inch Cartridge (QIC) tape has proved to be one of the best among all other data tape cartridges. You can easily avail the finest Quarter Inch Cartridge (QIC) tape from www.tape4backup.com
The Quarter Inch Cartridge (QIC) tape is an efficient and reliable tape. QIC tape provides its users with great capacity for storing data at a high speed. The Quarter Inch Cartridge (QIC) tape is being widely used by the modern generation. QIC effectively fulfills the storage needs of the users which includes the storing and backing up of data. The most economical and higher capacity QIC tape is available at www.tape4backup.com
For online orders of QIC tape specially QIC DC6250 tape, QIC DC6525 tapes, QIC DC9120 tape, QIC DC9135 tapes, QIC DC9200 Tape and QIC DC9250 tape please visit www.tape4backup.com or call 1-888-491-4949
About the Author
QIC tape technology is the ideal choice that offers cost-efficient tape storage solutions. QIC backup tape is very robust that offers increased transfer speed and unmatched durability.Jessica McIntosh (Marketing Manager)
http://www.tape4backup.com
34972 Newark Blvd, # 501, Newark CA 94560
Tel : 888-491-4949
Fax : 888-449-5050
Email: jessica@tape4backup.com
How do hard drives store data?
What is RLL and PRML encoding?
Ah,,, confused, lol.
Ok Basically a hard drive is a series of magnetized circular platters. The platters spin and there is an arm that moves back and forth so that its head can touch any part of the platters. When data is written to the drive it is written in a series of ones and zeros. To accomplish this a electric current is sent down the head and through a coil of wire at the head of the arm the current create a magnetic field which changes the polarity of the magnetic field that area of the platter.
When reading from the disk the head scans the disk and the magnetic field of the platter cause a current to travel from the coil of wire back up the arm and the polarity shift causes fluctuations in the current which can be translated into ones and zeros.
Now because of limitations of equipment and slight variations of speed on the spin disks long runs of ones or zeros can be misread which is where RLL encoding comes in basically it ensures that the long runs of ones or zero's do not appear.
Where PRML is a method of converting analog signals such as the fluxes of current by polarity changes to a digital signal of ones and zeros.
This is just a basic explanation it of course gets much or complicated.
The TNA Tirade (Episode 22: Beer and Mirrors)
The TNA Drinking Game makes its long-awaited return. Frankly, I need it and so do you.
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