Both the 2.5" and 1.8" are the diameters of the medium itself -- sometimes referred to as the platter.
The depth of the casing looks suspiciously like hard FFU -- namely 0.5". They seem to have opted for using a mixture of hard SI and hard FFU. However, as their OEM customers will only be concerned with outside dimensions, operating voltage, current draw, and interface specifications (and possibly mass), the consortium passes the SI purity test on those (or at least on the subset they've specified on the web site). The actual diameter of the disk itself is of no real interest to anyone but the manufacturer (although the platters may conceivably be supplied by another company specializing in disk media). Bill Potts, CMS Roseville, CA http://metric1.org [SI Navigator] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of kilopascal Sent: Friday, January 03, 2003 16:01 To: U.S. Metric Association Subject: [USMA:24348] RE: iVDR "inch" drives? 2003-01-03 Yes, but which of the dimensions stated is the 2.5 suppose to represent? John Hardware Specification (2.5-inch disk) Size (W x D x H)130mm x 80mm x 12.7mm ShockproofMore than 900G (when not running) Connector SpecificationsConnector for iVDR 50 pin Connector durabilityconnect/disconnect 10,000 times CommandATA Standard + AV Expansion + Secure Expansion (option) A 1.8-inch iVDR disk will also be studied. ----- Original Message ----- From: "Bill Potts" <[EMAIL PROTECTED]> To: "U.S. Metric Association" <[EMAIL PROTECTED]> Sent: Friday, 2003-01-03 06:53 Subject: [USMA:24336] RE: iVDR "inch" drives? > Sorry to be the bearer of bad tidings, Carleton, but iVDR's own web site > refers to them as 2.5" and 1.8", although the case specs are in mm. > > See http://www.ivdr.org/iVDR/ivdr_e.html. > > Another example of organizations in metric countries pandering to U.S. > preferences. > > The consortium members are Canon Inc., Fujitsu Limited, Hitachi, Ltd., > Phoenix Technologies K.K., Pioneer Corporation, SANYO Electric Co., Ltd., > Sharp Corporation, and Victor Company of Japan. See > http://www.ivdr.org/consortium/consortium_e.html. > > Bill Potts, CMS > Roseville, CA > http://metric1.org [SI Navigator]
