gws@n8emr.UUCP (Gary Sanders ) (11/23/88)
Craig Votova (cmv@looney or att!looney!toons!cmv) is having problems posting to the net so he ask me to relay this info on to you. I've been able to do some playing around with a couple of pretty neat hard disk drives from Control Data Corp. that I thought the net at large would like to hear about, so here's a little blurb on these babys. These are half-height 3.5 inch hard drives that can have up to 100MB of storage (~83MB formatted). They are incredibly fast with an advertised average seek time of 16.5ms, they are sturdy, fairly quiet, and use a very small amount of power. I had the 100MB version running in my unixpc over the weekend, and it worked great! The exciting thing about this is that with the half height case for the unixpc, you could fit 2 of these drives (sideways) in place of the 1/2 height 5.25" drive, and power both off of the existing unixpc power supply! That will be a pretty attractive deal once John tells us how to configure the motherboard for more than one hard disk. I tried the drive in my unixpc using both the WD1010 and WD2010 hard disk controller chips, both worked fine. I only had it formatted for 8 heads and 1024 cylinders though, since I haven't had a chance to upgrade my new motherboard yet. The price on this drive should be around $1000.00, and it should be available now. Here are the specs... CDC Swift (tm) 3.5" Half Height 55/100MB ST506 Hard Disk Drives: Model: 94355-55 94355-100 Unformatted (bytes): 55,829,760 100,493,568 Formatted (bytes): 46,653,440 83,976,192 Ave. Seek Time (Ms): 16.5 16.5 Recording Method: MFM MFM Tracks/Cylinder: 5 9 Cylinders: 1072 1072 Sectors/Track: 17 17 Bytes/Sector: 512 512 Data Transfer Rate: 5Mbits/sec 5Mbits/sec Rotational Speed: 3600 RPM 3600 RPM Average Latency 8.33ms 8.33ms POWER Voltage: +5VDC +12VDC Regulation: +/-5% +/-5% Noise Immunity: 50mV 100mV Max. Operating Current: 0.6A 0.8A Typical Op. Current: 0.4A 0.7A Max. Initial Current: 0.75A 2.0A I've also had these running in AT&T 6312 boxes with no problems either. Some very impressive results were printed when we ran the spinrite(tm) program on it. I can post these results if there is enough interest. Feel free to send mail to me if you have any further questions on this drive, I'd be happy to try and answer them. -Craig Votava [att!]looney!cmv -- Gary W. Sanders (osu-cis!n8emr!gws, gws@osu-cis) (cis) 72277,1325 (packet) N8EMR @ W8CQK (ip addr) 44.70.0.1 HAM/SWL/SCANNER BBS (1200/2400/19.2-PEP) 614-457-4227