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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!howland.erols.net!news.mathworks.com!fu-berlin.de!irz401!orion.sax.de!uriah.heep!not-for-mail Message-ID: <199704240303.XAA01720@phoebe.accinet.net> Date: Wed, 23 Apr 1997 23:07:40 -0400 From: macwhiz@phoebe.accinet.net (Rob Levandowski) To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Subject: Re: Need help connecting EMC Symmetrix array Organization: ACC iNet (from ACC Long Distance) Newsgroups: comp.unix.bsd.freebsd.misc Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 8bit References: <macwhiz-ya023680001504971525230001@news.accinet.net> <5jm1rg$4bf@uriah.heep.sax.de> X-Newsreader: Yet Another NewsWatcher 2.3.6 Lines: 35 Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:39653 (A copy of this message has also been posted to the following newsgroups: comp.unix.bsd.freebsd.misc) > > Also, the logical geometry reported by the Symmetrix for each drive is > > 18,410 cylinders, 15 heads, 64 512-byte blocks. FreeBSD doesn't seem to > > like this idea. How can I make FreeBSD happy with the geometry? > > Explain ``doesn't seem to like''. I have no idea why it should not be > happy with it. MO drives typically also have some 18000 cylinders, > but with only one head there. I've got such a drive working fine. If I try to use "sysinstall" to perform the format through the character- based user interface, it complains that the geometry is invalid. In the intervening days, I have found out that the actual geometry is 18410 cylinders, 27 heads, 64 512-byte blocks. (Well, that's the actual -virtual- geometry, since the cache controller in the Symmetrix shields the actual disks from my view.) I haven't yet had a chance to try these settings. > Geometry figures are fairly pointless anyway. If you're clever, you > don't need them at all. :) (At least, on non-boot mediums, otherwise > your BIOS cares for them due to the stupid 1024 cylinder limit.) I'm not so clever... :) How can I get around these figures? These disks will be used for news spool space; I'm planning to mount them as one volume via ccd. They're not to be bootable. EMC is solving the multiple-LUN issue by reprogramming the unit to use multiple SCSI IDs, rather than multiple LUNs. Until I need more than 8.5*15Gb of news spool, it shouldn't be a problem. :) -- Robert Levandowski macwhiz@phoebe.accinet.net