Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!pacific.mps.ohio-state.edu!tut.cis.ohio-state.edu!bloom-beacon!eru!luth!sunic!chalmers!tekno.chalmers.se!cth_co From: cth_co@tekno.chalmers.se (CHRISTER OLSSON) Newsgroups: comp.sys.ibm.pc Subject: Re: RLL controllers with MFM drives Message-ID: <2700@tekno.chalmers.se> Date: 23 Oct 89 10:08:06 GMT References: <2546@bingvaxu.cc.binghamton.edu> <4265@ncsuvx.ncsu.edu> Organization: Chalmers Univ. of Technology, Gothenburg, Sweden Lines: 19 > KIDDIES! Do NOT TRY THIS AT HOME!!! > > If a drive is not SPECIFICALLY RLL-Rated by its manufacturer, > do NOT try hooking it to an RLL controller to boost storage. You > are playing Russian Roulette with your data and there is a VERY high > probability that you will lose everything. > > If you want the space THAT badly, go out and buy yourself an > RLL-rated drive! > Check with SPINRITE (from CORETEST package). If the tolerance is lower than 1%, you can use the drive with RLL. If the tolerance is near 1% or over, you shouldn't use drive with RLL. Most drives is between 0.1 and 0.5% and can use RLL. For example, the seagates typically has lower than 0.5% even if they are only MFM-rated. (ST225, ST251 ..)