MFM - modified frequency modulation and RLL - Run length limited... hard drive controller technologies used to encode how data is written :-). These were 5.25 inch hard drives.... old old technology ... before ATA.
Natarajan >>> Mark Zelden <mark.zel...@zurichna.com> 10/22/2009 12:16 PM >>> On Thu, 22 Oct 2009 14:40:44 -0400, Thompson, Steve <steve_thomp...@stercomm.com> wrote: >-----Original Message----- >From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On >Behalf Of Mark Zelden >Sent: Thursday, October 22, 2009 1:27 PM >To: IBM-MAIN@bama.ua.edu >Subject: Re: OFF TOPIC - DELL CUSTOMER SUPPORT > ><snippage> >I've been doing this almost since my first PC. Since I've always just >copied hard drives to bigger hard drives, I still have some stuff from >my >40M hard drive from the first PC I built. > ><snippage> > >And how well does that MFM drive work today? Or is it RLL? > I don't understand the question. I don't have that drive, I've always just "upgraded" my HDs by copying to bigger / newer technology (for me, that is Sata 3GB/sec). Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:mark.zel...@zurichna.com z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html NOTICE OF CONFIDENTIALITY The information contained in this communication, including but not limited to any accompanying document(s) and/or attachment(s), is privileged and confidential and is intended solely for the above-named individual(s). If you are not the intended recipient, please be advised that any distribution, copying, disclosure, and/or use of the information contained herein is strictly prohibited. If you received this communication in error, please destroy all copies of the communication, whether in electronic or hard copy format, and immediately contact the Security Office at EdFund at (916) 526-7539 or securityoff...@edfund.org. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
