Date: Sun, 24 Mar 1996 17:54:26 +0100 (MET) From: Andreas Klemm <andreas@knobel.GUN.de> To: Bruce Evans <bde@zeta.org.au> Cc: jkh@freebsd.org, hackers@freebsd.org Subject: Re: [was/is: adding 2nd disk] little changes to sysinstall/Makefile Message-ID: <Pine.BSF.3.92.960324174749.459B-100000@knobel.gun.de> In-Reply-To: <199603241603.DAA23005@godzilla.zeta.org.au>
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-----BEGIN PGP SIGNED MESSAGE----- On Mon, 25 Mar 1996, Bruce Evans wrote: > >Another thing is, I had to manually change the disk geometry > >to 255/63 scheme. My first disk is so large (4GB) so that > >64/32 head/sector mapping isn't sufficiant. > > >If I don't change the geometry to 131/255/63, then the > >SCSI hostadapter BIOS complaints about it, that a drive > >with another geometry then the default boot disk was found. > >This prevents further booting, you have to press return, > >so ... it's deadly required, to change the geometry manually > >this time ... > > Which SCSI hostadaptor? Put in the list of discrecommended > ones :-). ZI have the following which handle mixed geometries > properly: > > bt445c > sc200 Well, I have a AHA 2940 with Firmware release 1.16 if I remember right ;-) Well the Adaptec isn't that bad, but a bit picky ;-) > >fnew|newfujitsu|Fujitsu M2694ES-512 1.05GB:\ > > :dt=SCSI:\ > > :ty=winchester:\ > > :se#512:nt#255:ns#63:nc#131:rm#5400:\ > > :pa#1907844:oa#196608:ba#8192:fa#1024:ta=4.2BSD:\ > > :pb#196608:ob#0:tb=swap: \ > > :pc#2104452:oc#0:\ > > :pd#2104452:od#63: > > >What makes me wonder is, that disklabel complains, if you > >choose the total sector size for the ":pc#" entry, which > >- - in theory - should reflect the total sector size of the > >disk. > > Partition C should have the same size as the logical drive (i.e., the > slice). Uh, you're right ... I remembered it wrong when I was writing my mail, sorry. ;-) # size offset fstype [fsize bsize bps/cpg] a: 65536 0 4.2BSD 0 0 0 # (Cyl. 0 - 4*) b: 196608 65536 swap # (Cyl. 4*- 16*) c: 6345675 0 unused 0 0 # (Cyl. 0 - 394) d: 3068875 3276800 4.2BSD 0 0 0 # (Cyl. 203*- 394*) e: 131072 262144 4.2BSD 0 0 0 # (Cyl. 16*- 24*) f: 524288 393216 4.2BSD 0 0 0 # (Cyl. 24*- 57*) g: 262144 917504 4.2BSD 0 0 0 # (Cyl. 57*- 73*) h: 2097152 1179648 4.2BSD 0 0 0 # (Cyl. 73*- 203*) > The drive should also have the same size as itself :-). You've made the > drive size (#su) default to 255*63*131 = 2104515 = perhaps 63 too > large. It must be getting silently truncated to 2104452 to work, or > perhaps the drive really has at least (number of sectors before this > slice) + 2104515 sectors. > > Partition D hasn't been special since 2.0 and shouldn't overlap the > swap. You're so right, I'm so wrong ;-) ok... > The swap partition shouldn't be started at offset 0. That's where the > bootblocks go. Oh, ok, I didn't want to boot from it ;-) > >And for all of you who said "buh baeh", disklabel is outdated stuff, > >when I tried to help the user, who first asked ... HOW do YOU get > >a perfect disklabel for a 2nd disk, without using a proper disktab > >entry ???? Which hacked up -current are you using ?! :-(( > > disklabel /dev/rsd1 >/tmp/foo > $EDITOR /tmp/foo # adjust sizes from disk size to slice size if different > # fix rpm and interleave fields > # fill in informational fields (optional) > disklabel -R -r sd1 /tmp/foo > ^note: no "/dev/r" Hmmmm, this didn't work for me, perhaps I did something wrong. Well, next time, when I want to add another one, I'll try that out. Thanks Andreas /// - -- andreas@knobel.gun.de /\/\___ Wiechers & Partner Datentechnik GmbH Andreas Klemm ___/\/\/ $$ Support Unix - aklemm@wup.de $$ pgp p-key http://www-swiss.ai.mit.edu/~bal/pks-toplev.html >>> powered by <<< ftp://sunsite.unc.edu/pub/Linux/system/Printing/aps-491.tgz >>> FreeBSD <<< -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBMVV+QvMLpmkD/U+FAQHI8gP/as8zouzyL4ksLF6C7K8qY7Heum3iKSmk XOuZmM35O+jDs4mPdg1nGubMkQN9YJMDU7rt8kGPDlBh6f28LQaXceJuJhcLzGJM tf7gEhxRAj4Myq2AGo8G7zqPcpsW4G5rwn5Y9utO9dV6Nq5fcbpLYQEm4hVS20L4 8NtIo5g+Zoo= =4MZV -----END PGP SIGNATURE-----
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