Path: utzoo!censor!geac!torsqnt!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!bywater!acheron!archet!larouch!jparnas From: jparnas@larouch.uucp (Jacob Parnas) Newsgroups: comp.sys.ibm.pc.rt Subject: Re: 3rd Party Drive in IBM RT Message-ID: <1990Feb25.233908.1196@larouch.uucp> Date: 25 Feb 90 23:39:08 GMT References: <91.25dc43cf@venus.ycc.yale.edu> Reply-To: jparnas@larouch.UUCP (Jacob Parnas) Organization: Larouch Headquarters, Hopewell Junction, NY Lines: 34 In article <91.25dc43cf@venus.ycc.yale.edu> newman@suncis.ycc.yale.edu (Andrew N ewman) writes: >Ok: > >Now I've really done it. I went ahead and got one of those zippy HUGE >EESDI drives that cost hardly anything from CDC. I intend to put it in >my RT Workstation running ACIS. The drive I bought is a WREN VI with the >EESDI controller. Pertinent specs I have are: > > # of Sectors Per Track: 53 > # of heads 15 > # of cylinders 1632 >... The problem is that the Wren VI ESDI is a 15 Mhz drive. The EESDI card only supports up to 10 Mhz. Wren V's are (to the best of my knowledge) the biggest ESDI disks that the EESDI card supports (442 MB unformatted). If you want bigger disks, get the Adaptek SCSI controller (around $300) and you can use Wren VI SCSI or Wren VII SCSI. There is a public domain driver for the Adaptek SCSI adapter. The (Seagate/Imprimis/CDC) Wren VI is 766 MB and the Wren VII is 1.2 GB (unformatted). Note: This driver only exists for 4.3 BSD/AOS. No AIX support. ------------------------------------------------------------------------------ | Jacob M. Parnas | DISCLAIMER: The above message is from | | IBM Thomas J. Watson Research Ctr. | me and is not from my employer. IBM | | Arpanet: jparnas@ibm.com | might completely disagree with me. | | Bitnet: jparnas@yktvmx.bitnet \---------------------------------------| | Home: ..!uunet!bywater!acheron!larouch!jparnas | Phone: (914) 945-1635 | ------------------------------------------------------------------------------