User manual HITACHI H2172 DATASHEET

[. . . ] H2xxx. txt 2 1/2-INCH 172, 258 and 344 MB LOW PROFILE DISK DRIVES MODELS H2172, H2258 and H2344 _____________________________ AN OEM OFFERING FROM IBM These models of ADSTAR's* OEM 2 1/2-inch disk drives extend the capacity storage options for laptop and notebook computers. [. . . ] The resulting reduction in the number of heads and disks required provides exceptional reliability, with a projected MTBF of 300, 000 power-on hours. All models feature an average seek time of 14 ms, and contain all the drive and controller electronics in a slim 17 mm, 2 1/2-inch form factor. QUALITY AND AVAILABILITY Worldwide IBM manufacturing facilities can provide drives in volume quantities when and where you want them. HIGHLIGHTS 172, 258 and 344 MB capacity Magneto-Resistive head technology 250 G non-operating shock Slim form factor (17 mm height) ECC on the fly Zone Bit Recording 300, 000 power-on hours MTBF Mounts in all six directions Dedicated head landing zone Automatic actuator lock 64 KB segmented data buffer SCSI and AT attachment PRODUCT DESCRIPTION _______________________________________________________________________________ 2 1/2" 172, 258 and 344 MB Disk Drives _______________________________________________________________________________ Configuration Interface SCSI/AT) Device Capacity Formatted 172/258/344 MB (1) Sector Size 512 Bytes Recording Zones 8 User Cylinders 2264 Data Heads 2/3/4 Disks 1/2/2 Areal Density Average 322 Mb/sq in Recording Density Maximum 74800 BPI Track Density 4300 TPI Page 1 H2xxx. txt _______________________________________________________________________________ Performance Rotational Speed 3800 RPM Media Transfer Rate 20. 0 (Inner), 32. 0 (Outer) Mbits/sec Data Buffer Read 32 KB/Write 32 KB Interface Transfer Rate (Max) AT 6. 0 MB/sec SCSI 4. 5 msec Latency Average 7. 9 msec Seek Time (Typical) Average (Read) 14 msec Track to Track 4. 0 msec Full Track 23 msec _______________________________________________________________________________ Reliability MTBF Projected power-on hours 300, 000 _______________________________________________________________________________ Power Requirements + 5 VDC + or - 5% Dissipation (typical) Start Up (Maximum Peak) 4. 7 Watts Seek 2. 0 Watts Read/Write 2. 8 Watts Idle 1. 35 Watts Shutdown 0. 4 Watts _______________________________________________________________________________ Physical Size Height 17 mm Width 70 mm Depth 100 mm Weight 173/180/180 g _______________________________________________________________________________ Operating Non-Operating _______________________________________________________________________________ Environmental Characteristics Ambient Temperature 5 to 55 degrees C -40 to 65 degrees C Relative Humidity Non-Condensing 8% to 90% 5% to 95% Maximum Wet Bulb Non-Condensing 29. 4 degrees C 40 degrees C Shock Half-sine-wave 10 G/11 msec 250 G/2 msec Vibration Random (RMS) 0. 67 G (5-500 Hz) 1. 04 G (2-200 Hz) _______________________________________________________________________________ (1) 1 MB=1, 000, 000 Bytes Product Description data represents IBM's design objectives and is provided for comparative purposes; actual results may vary depending on a variety of factors. This product data does not constitute a warranty. Questions regarding IBM's warranty terms or methodology used to derive this data should be referred to your IBM representative. [. . . ] Copywrite International Business Machines Corporation 1994 * IBM, ADSTAR Corporation and AT are trademarks of International Business Machines Page 2 H2xxx. txt Page 3 [. . . ]