yao@euler.uucp (Wei-Hsin Yao) (03/31/89)
Hi, folks, thanks for your help about the information of Seagate ST225/4096. I think some of you might be interested in this information: Mark davis@cs.uncc.edu said: |Both 251 and 4096 have auto-park. There are important differences |though. The 251 has a stepper motor. The 4096 has a voice coil |mechanism, which is superior technology, is quieter, etc. irish@Sun.COM said: |ST251 did not have shock mounts. ST 251 failed Power Cycling. Adam ads4@tank.uchicago.edu wrote: |I own an ST251-1 and enjoy it immensely (I run a BBs off of that and a ST225) air@anableps.berkeley.edu sent me the following information: |PART # STORAGE SPEED PRICE | IN IN | MEGABYTES MILISECONDS |ST225 21.4 65 299 |ST125 21.4 40 339 |ST125-1 21.4 28 399 |ST251 42.8 38 499 |ST251-1 42.8 28 559 |ST4096 80 28 799 FULL HEIGHT | | st251 and st4096 |recoverable read errors 1per10^10 bits read |nonrecoverable read errors 1per10^12 bits read |seek errors 1per 10^6 seeks |Service life: Five years john@wa3wbu.uu.net said: |Both the ST-251 & ST-4096 are auto-parking. They park in different |ways however. The ST-251 uses a stepper-motor positioner. When you |remove power it automatically starts rotating the heads toward the inner |hub. Once they reach the hub, a stopper bangs against a stop until the power |dies off. This takes about 3 seconds and produces a slight vibrating sound |which is perfectly normal and does not harm the drive. | | The ST-4096 uses a voice-coil positioner. When power is removed from |this drive a stored pulse throws the carraige/head mechanism out to the |inner-most cylinder and a electro-magnet latch locks them there. When |you power up the drive the next time, the selenoid releases and allows |the heads to be free again. Greg ccastgw@prism.gatech.edu said: |Both the 251-1 and 4096 have auto-park on power off. As far as reliability |goes, I can't really say. They're sure to be better than the 238R. |(I just recovered from my first crash on it yesterday. Not fun.) I myself have a Seagate 225 for about one year, not many complaints, just too slow. I tried some software, the acess time of my ST225 is about 80 ms, especially when I run LaTeX..... Anyway, I think I will not only consider Seagate's HD, but also Toshiba or Mitsubishi's. Again, Thanks for all your help! Wei ------------------------------------------------------------------- Wei Hsin YAO Internet: yao@euler.berkeley.edu Dept of ME, UC Berkeley Phone #:(415) 642-0935 Hearst Ave. CA 94720 -------------------------------------------------------------------