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HP 7935
The HP 7935 is a business computer hard disk drive system manufactured by Hewlett-Packard. It was produced by the Disc Memory Division in Boise, Idaho USA beginning in 1982 at a cost of about $27,000. Within the company the drive was known as the "BFD", ostensibly an acronym for "big fixed disc" but the development engineers had used that acronym for "big fucking disc"[citation needed], a term relative to the smaller 7920 series drives introduced earlier by the company.
The 7935 had four bottom mounted casters for moving and four lock-down feet for stability in the computer room.
The drive's linear motor was so powerful if the feet were not down, when in operation the drive could literally move about the computer room.
Height: 82.5 cm (32.5 inches), Width: 55.2 cm (21.7 inches), Depth: 83.4 cm (32.8 inches), 154 kg (339.5 lb.)
The HP7935 allowed the user to remove and install a 404 megabyte model 97935 Disc Pack.
The HP7933 was the same basic drive with a disc pack only removable by service personnel.
The 793x series provided a 300% increase in capacity of the HP 7925 at only a slightly increased cost. Performance-wise, the 7935 had a 15-20% performance decrease compared to the 7925. Apparently modifications were made by HP, in a program called the Performance Enhancement Project, raising 7935 performance 15% making it comparable to the older model.
The HP 7935/33 achieved a track density of 625 tracks per inch (considered high at the time), achieving capacity using 7 platters, 13 data surfaces and 14 heads (one head and surface were used for servo data). The disc pack spun at 2694 RPM.
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HP 7935
The HP 7935 is a business computer hard disk drive system manufactured by Hewlett-Packard. It was produced by the Disc Memory Division in Boise, Idaho USA beginning in 1982 at a cost of about $27,000. Within the company the drive was known as the "BFD", ostensibly an acronym for "big fixed disc" but the development engineers had used that acronym for "big fucking disc"[citation needed], a term relative to the smaller 7920 series drives introduced earlier by the company.
The 7935 had four bottom mounted casters for moving and four lock-down feet for stability in the computer room.
The drive's linear motor was so powerful if the feet were not down, when in operation the drive could literally move about the computer room.
Height: 82.5 cm (32.5 inches), Width: 55.2 cm (21.7 inches), Depth: 83.4 cm (32.8 inches), 154 kg (339.5 lb.)
The HP7935 allowed the user to remove and install a 404 megabyte model 97935 Disc Pack.
The HP7933 was the same basic drive with a disc pack only removable by service personnel.
The 793x series provided a 300% increase in capacity of the HP 7925 at only a slightly increased cost. Performance-wise, the 7935 had a 15-20% performance decrease compared to the 7925. Apparently modifications were made by HP, in a program called the Performance Enhancement Project, raising 7935 performance 15% making it comparable to the older model.
The HP 7935/33 achieved a track density of 625 tracks per inch (considered high at the time), achieving capacity using 7 platters, 13 data surfaces and 14 heads (one head and surface were used for servo data). The disc pack spun at 2694 RPM.