Date: Wed, 20 Feb 2002 10:29:20 -0700 From: Lorin Lund <fbsd@wbs-inc.com> To: burningclown@westhost43.westhost.net Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: partitions, disklabel, etc. Message-ID: <20020220173104.9D60F2100F@ns1.infowest.com>
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To run the program you would have to have a DOS boot floppy. 2/19/2002 11:01:00 AM, burningclown@westhost43.westhost.net wrote: > >I appreciate it - but I'd need DOS, right? I split this little guy into >Linux and FreeBSD and got rid of anything MS, I'm afraid. > >If I see any degradation of either filesystem, I will just start from >scratch. This laptop is mainly a learning tool anyway (so I don't have to >stop learning shell scripting if I have to leave town) and has no really >critical data on it. > >Which ... is good. > >g > > On Tue, 19 Feb 2002, Lorin Lund wrote: > >> I've got a little program, runs under DOS, uses BIOS disk IO that allows >> some mucking around with the BIOS partition table. If it would be >> useful I could send it to you. >> >> Some of it's capabilities are: >> 1) hand-editing the type field, the start cyl field, the end cyl field, >> 2) swap slots in the partition table, >> >> It's built with djgpp & rhide. >> >> Let me know if you think it would help. >> >> >> 2/18/2002 7:09:33 PM, Glenn Becker <chexmix@burningclown.com> wrote: >> >> >Hi, >> > >> >I've got a dual boot Debian GNU/Linux and FreeBSD 4.5 installation on >> >an older Toshiba laptop (Satellite Pro 470CDT). Lately I've been >> >concerned about some messages upon bootup (relevant part of dmesg >> >output reproduced below) where the Linux hunks of the hard drive are >> >picked out as being invalid. >> > >> >Honestly, I'm not sure why they are showing up there at all. But I >> >think the problem(s) may originate with my stupid deletion of my >> >Linux swap partition and my subsequent replacement of that same >> >partition -- I recall reading in a FreeBSD + Linux Mini-HOWTO that >> >a) one has to put FreeBSD =after= Linux on an HD and b) it's best >> >not to muck with the Linux partitions after the dual-OS system is >> >set up. >> > >> >I've had no problems (yet) with either system, but have been trying >> >to research it to see if I can fix it WITHOUT reinstalling both OSs >> >from scratch (I'd like to avoid this and the wear on the lappy's CD >> >drive if possible). Some other weird stuff has popped up. >> > >> >If I run disklabel -r command on /dev/ad0, I get this: >> > >> >disklabel: bad pack magic number (label is damaged, or pack is >> >unlabeled) >> > >> >Without -r, I get something completely different, which I reproduce >> >at the end of this message. >> > >> >The output of fdisk (see below) also seems completely screwed up - >> >it shows all three partitions on the drive as beginning and ending >> >at the same CHS spot: cyl 1023/ head 254/ sector 63. This seems >> >like a cylinder 1024 thang? Mebbe? >> > >> >Soooo, I'm wondering: 1) should I create a disklabel for /dev/ad0, >> >or will this totally bork all my Linux stuff? 2) can I simply >> >-delete- the device files /dev/ad0s1* and /dev/ad0s2*, since I'm >> >not using them for anything in FreeBSD? Or not? >> > >> >In short, how do I fix this thing? Or do I? >> > >> >Thanks for any enlightenment and apologies for the length. >> > >> >Glenn Becker >> > >> > >> > >> > >> > >> >%%%%%% RELEVANT lines from dmesg %%%%%%%%%%% >> > >> >Mounting root from ufs:/dev/ad0s3a >> >ad0s1: raw partition size != slice size >> >ad0s1: start 63, end 27342629, size 27342567 >> >ad0s1c: start 63, end 30716279, size 30716217 >> >ad0s1: truncating raw partition >> >ad0s1: rejecting partition in BSD label: it isn't entirely within the slice >> >ad0s1: start 63, end 27342629, size 27342567 >> >ad0s1f: start 414367, end 30716279, size 30301913 >> >ad0s2: raw partition size != slice size >> >ad0s2: start 27342630, end 27599669, size 257040 >> >ad0s2c: start 27342630, end 58605119, size 31262490 >> >ad0s2: truncating raw partition >> >ad0s2: rejecting partition in BSD label: it isn't entirely within the slice >> >ad0s2: start 27342630, end 27599669, size 257040 >> >ad0s2b: start 27445030, end 27715973, size 270944 >> >ad0s2: rejecting partition in BSD label: it isn't entirely within the slice >> >ad0s2e: start 27715974, end 27756933, size 40960 >> >ad0s2: rejecting partition in BSD label: it isn't entirely within the slice >> >ad0s2f: start 27756934, end 58605119, size 30848186 >> > >> > >> >%%%%%%%%%%OUTPUT of disklabel /dev/ad0 %%%%%%%%%%% >> > >> ># /dev/ad0: >> >type: unknown >> >disk: amnesiac >> >label: fictitious >> >flags: >> >bytes/sector: 512 >> >sectors/track: 63 >> >tracks/cylinder: 255 >> >sectors/cylinder: 16065 >> >cylinders: 3648 >> >sectors/unit: 58605120 >> >rpm: 3600 >> >interleave: 1 >> >trackskew: 0 >> >cylinderskew: 0 >> >headswitch: 0 # milliseconds >> >track-to-track seek: 0 # milliseconds >> >drivedata: 0 >> > >> >8 partitions: >> ># size offset fstype [fsize bsize bps/cpg] >> > c: 58605120 0 unused 0 0 # (Cyl. 0 - 3647) >> > >> > >> >%%%%OUTPUT of fdisk /dev/ad0 %%%%%%%%%%% >> > >> >******* Working on device /dev/ad0 ******* >> >parameters extracted from in-core disklabel are: >> >cylinders=3648 heads=255 sectors/track=63 (16065 blks/cyl) >> > >> >Figures below won't work with BIOS for partitions not in cyl 1 >> >parameters to be used for BIOS calculations are: >> >cylinders=3648 heads=255 sectors/track=63 (16065 blks/cyl) >> > >> >Media sector size is 512 >> >Warning: BIOS sector numbering starts with sector 1 >> >Information from DOS bootblock is: >> >The data for partition 1 is: >> >sysid 131,(Linux filesystem) >> > start 63, size 27342567 (13350 Meg), flag 0 >> > beg: cyl 0/ head 1/ sector 1; >> > end: cyl 1023/ head 254/ sector 63 >> >The data for partition 2 is: >> >sysid 130,(Linux swap or Solaris x86) >> > start 27342630, size 257040 (125 Meg), flag 0 >> > beg: cyl 1023/ head 255/ sector 63; >> > end: cyl 1023/ head 254/ sector 63 >> >The data for partition 3 is: >> >sysid 165,(FreeBSD/NetBSD/386BSD) >> > start 27599670, size 31005450 (15139 Meg), flag 80 (active) >> > beg: cyl 1023/ head 255/ sector 63; >> > end: cyl 1023/ head 254/ sector 63 >> >The data for partition 4 is: >> ><UNUSED> >> > >> > >> >To Unsubscribe: send mail to majordomo@FreeBSD.org >> >with "unsubscribe freebsd-questions" in the body of the message >> > >> > >> >> >> > >-- >+----------------+ >http://www.burningclown.com >"Everyone's Portal to Nothing At All" >+----------------+ > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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