Category: storage

MAXTOR 7540AV

MAXTOR 7540AV

The Maxtor 7540AV is a large capacity 540MB hard disk. The 7540AV is slightly larger than DOS  could manage with on 8088 or 80286 based machines. Maxtor also had larger SCSI disks up to 1.2GB but they were very expensive and DOS limitations reduced their appeal. This disk was $550 new in Q1 1994. 540MB …

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THE CD/DVD/BD DRIVE

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Games were early adopters of the CD drive when the PC started supporting them in the early 1990s. The huge capacity of the CD meant that far more sophisticated games could be possible. The ISO standards are called the Yellow book. There are also many other standards which helped make the CD drive the pervasive …

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SOLID STATE FLASH DRIVES

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Solid state drives (SSD) have become very popular with laptop machines. For many years laptop users, struggling with slow hard disks, bought SSD replacements by the millions. Back in the early 1990s SanDisk was offering solid state flash based storage. 20MB was $1000. Fast forward to 2016 and now you can get 2TB for $1000. …

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PCMCIA

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PCMCIA is based on the EIDE architecture found in desktop personal computers. By using a smaller connector with power and other signals, it allowed the use of solid state storage other other peripherals to be attached. In Japan the JEIDA standard competed with PCMCIA so in 1991 after some pressure from industry the standards were …

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HARDCARD

hardcard

The IBC PC usually had a single floppy drive. Quantum realized some machines could used an expansion card to add storage. The original Quantim 10MB hard card was $1095. The earlier Xebec Owl 10MB disk was released in August 1984 with a 5¾” disk and a SASI controller on a card. Quantum introduced the hardcard with …

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RODIME RO352

RODIME RO352

The Rodime RO352 is he first hard disk available in the 3½” format. This disk cost $1,895 when new in 1983. 11MB ST506 interface 306 cylinders 4 heads 17 sectors 306 landing zone type 02 3600rpm The Rodime RO0352  is a ST506 MFM hard disk in the 3½” format . There are two models in the series, RO351 …

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HARD DISK ERRORS

mfm hard disk

Occasionally hard disks run out of spare sectors. Often those errors arise after a few years of use. It is best to format the disk and then check the media to be sure all of the bad sectors are mapped. This way Windows can continue to use the disk for general use. FORMAT Generally format …

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HARD DISK CAPACITY

Vendors use a decimal system on top of a binary one. They do this to make their products look bigger. Most disks present data using the binary system, sectors are 512 bytes however modern high capacity disks are now using 4096 byte sectors driven in part by the master boot record limitations and also to …

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HARD DISK LIMITS

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One of the most frustrating problems a lot of DIY enthusiasts came up against was BIOS problems that prevented the use of larger capacity disks. In the early days, DOS version 1 which came on a floppy with our original PC could not even use directories. All saved files had to be saved in the …

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THE HARD DISK

Back in the early 1980s the use of a 32-bit MBR index was believed to adequate. Hard disks from the 1956 to 1981 had not even made it much past 1GB with mainframes. The IBM 350 Disk Storage Unit (image), released in 1956, consisted of the magnetic disk memory unit with its access mechanism, the …

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