Path: utzoo!attcan!uunet!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!tank!chsun1!kusumoto From: kusumoto@chsun1.uchicago.edu (Bob Kusumoto) Newsgroups: comp.periphs.scsi Subject: Re: Installing Wren VII on Sun Keywords: Wren VII, Sun Message-ID: Date: 7 Jun 90 20:00:53 GMT References: <1990Jun6.211328.13096@utu.fi> Sender: news@tank.uchicago.edu Lines: 35 moj@mirfak.utu.fi (Matti Jokinen) writes: >I am looking for instructions on installing a CDC Wren VII 94601-12G disk >on a Sun-4 running SunOS 4.0.3. Especially, I would like to know how to >write the entries in /etc/format.dat. Wren VII has an unusual geometry: >bit density is constant and the number of sectors per track is variable. >I wonder if it really is possible to get optimal performance under SunOS. just a quick note, I wrote a message that's in the sun-spot archives about this. I don't have a copy but I'll gloss over it real quick. in format.dat, you can add an entry to look like: disk_type = "CDC Wren VII 94601-12G" \ : ctlr = MD21 : fmt_time = 4 : cache = 0x11 \ : ncyl = 1925 : acyl = 2 : pcyl = 1931 : nhead = 15 : nsect = 70 \ : rpm = 3600 : bpt = 41301 you can change the nsect parameter to try and push more space on your drive, although I doubt and highly do not recommend that you increase it to the theoretical max of 80. the format program will not "format" correctly. It will time out if you issue the format command in the format program. You can analyze the disk, call up the original defect list, and label the disk with the proper label and partition info. Beyond that, you're outta luck. Someone told me once that you can write the defect list by using sundiag, but I have no idea as to what this entails. Bob Bob Kusumoto | Find the electric messiah. Internet: kusumoto@chsun1.uchicago.edu | The AC-DC God. Bitnet: kusumoto@chsun1.uchicago.bitnet | --- My Life with the Thrill Kill UUCP: ...!{oddjob,gargoyle}!chsun1!kusumoto | Kult, "Kooler than Jesus"