Date: Mon, 19 Jun 1995 23:16:11 +1000 From: Bruce Evans <bde@zeta.org.au> To: hlew@genome.Stanford.EDU, terry@cs.weber.edu Cc: bde@zeta.org.au, bugs@FreeBSD.org Subject: Re: 2.05R panics on boot Message-ID: <199506191316.XAA03425@godzilla.zeta.org.au>
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>Okay, if boot from DOS (and with no Ontrack DM installed)... here's the >output from pfdisk 0 (the 850MB Ontrack DM DOS Drive) and pfdisk 1 (540 >MB FreeBSD drive) ># Partition table on device: 0 >geometry 1024 16 63 (cyls heads sectors) ># ID First(cyl) Last(cyl) Name # start, length (sectors) >1 84 0 1652 unkno # 1, 1666223 ># note: last(1): phys=(628,15,63) logical=(1652,15,63) ># note: first(1): phys=(0,0,2) should be (0,1,1) >2 0 0 0 empty # 0, 0 >3 0 0 0 empty # 0, 0 >4 0 0 0 empty # 0, 0 This is OK (except the `should be' note shouldn't be). ># Partition table on device: 1 >geometry 1022 16 63 (cyls heads sectors) ># ID First(cyl) Last(cyl) Name # start, length (sectors) >1 165 0 1052 unkno # 63, 1061361 ># note: last(1): phys=(1023,15,63) logical=(1052,15,63) >2 0 0 0 empty # 0, 0 >3 0 0 0 empty # 0, 0 >4 0 0 0 empty # 0, 0 OK, but several other things will have to be right to handle the partition extending beyond cylinder 1024: 1) The BSD boot partition (normally wd1a) must not extend beyond cylinder 1024. 2) bad144 must not be used. 3) The boot manager must not object to booting such partitions. I think the OS/2 boot manager would object. >--------- >Now if I boot from the hard drive with Ontrack DM's dynamic drive overlay >installed... ># Partition table on device: 0 >geometry 826 32 63 (cyls heads sectors) ># ID First(cyl) Last(cyl) Name # start, length (sectors) >1 1 0 825 DOS12 # 63, 1665153 >2 0 0 0 empty # 0, 0 >3 0 0 0 empty # 0, 0 >4 0 0 0 empty # 0, 0 This is OK. ># Partition table on device: 1 >geometry 1022 16 63 (cyls heads sectors) ># ID First(cyl) Last(cyl) Name # start, length (sectors) >1 165 0 1052 unkno # 63, 1061361 ># note: last(1): phys=(1023,15,63) logical=(1052,15,63) >2 0 0 0 empty # 0, 0 >3 0 0 0 empty # 0, 0 >4 0 0 0 empty # 0, 0 OK. >So it appears that nothing changes on the 540MB drive that doesn't use >Ontrack DM. So any ideas? The problem seems to have nothing to do with disk manager. Maybe your boot manager objects to partitions extending beyond cylinder 1024. Brucehome | help
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