Re: bug ?: Disappearing DOS partitions
On Fri, 19 Sep 1997, Lazaro Salem wrote:
> If you haven't fixed your problem, I can help you. Just send us what
> your able to see from DOS (with DOS FDISK) and/or from linux with
> cfdisk and with fdisk if you have it on your system (they do not present
> the same information as far as I remember).
Hi,
Thanks for offering to help. Sorry it took me so long to reply.
I'm sending you the information you asked for, but first I think I should
reexplain my problem. I don't I did a very good job of it in my first post.
After having added partitions to my hard disk using Linux fdisk,
and successfully installing Linux. I was able to boot to DOS and see,
consult, write to, and otherwise use two logical disks on the extended
partition. I could come back to Linux and see all my DOS disks (one a
primary partition and two logical disks). Then one day, booting to DOS,
the logical DOS drives were no longer there. Couldn't see 'em, couldn't
use 'em, autoexec.bat couldn't find 'em. If I booted back to Linux,
however, there they are. I can mount them and do anything one would
expect to do with a mounted file system. But not under DOS. As you will
see in the following partition table reports, DOS seems to have lumped
the two logical disks and the Linux logical partitions into one big
extended non-DOS partition.
Here goes, the partition table as reported by Linux fdisk, cfdisk
(Linux), and DOS fdisk.
----------- Begin transcript ---------------------------------
fdisk (Linux)
Disk /dev/hda: 64 heads, 63 sectors, 786 cylinders
Units = cylinders of 4032 * 512 bytes
Device Boot Begin Start End Blocks Id System
/dev/hda1 * 1 1 65 131008+ 6 DOS 16-bit >=32M
Partition 1 has different physical/logical endings:
phys=(259, 15, 63) logical=(64, 63, 63)
Partition 1 does not end on cylinder boundary:
phys=(259, 15, 63) should be (259, 63, 63)
/dev/hda2 261 66 473 821520 5 Extended
Partition 2 has different physical/logical beginnings (non-Linux?):
phys=(260, 0, 1) logical=(65, 0, 1)
Partition 2 has different physical/logical endings:
phys=(1023, 15, 63) logical=(472, 31, 63)
Partition 2 does not end on cylinder boundary:
phys=(1023, 15, 63) should be (1023, 63, 63)
/dev/hda5 261 66 130 131008+ 6 DOS 16-bit >=32M
/dev/hda6 521 131 195 131008+ 6 DOS 16-bit >=32M
/dev/hda7 781 196 465 542776+ 83 Linux native
/dev/hda8 1024 465 473 16600+ 82 Linux swap
****************
cfdisk 0.8d BETA (>2GB)
Disk Drive: /dev/hda
Heads: 64 Sectors per Track: 63 Cylinders: 786
Name Flags Part Type FS Type Size (MB)
------------------------------------------------------------------------------
/dev/hda1 Boot Primary DOS 16-bit >=32Mb 127.97
/dev/hda5 Logical DOS 16-bit >=32Mb 127.97
/dev/hda6 Logical DOS 16-bit >=32Mb 127.97
/dev/hda7 Logical Linux 530.09*
/dev/hda8 Logical Linux Swap 16.25*
Pri/Log Free Space 617.21*
***********
DOS fdisk
Partition Flag Type Volume Name Mb System Used
C:1 A PRI DOS 128 FAT16 8%
2 EXT DOS 802 52%
Total disk space : 1545 Mb (1 Mb = 1 048 576 bytes)
----------- End transcript ---------------------------------
Hope this helps you to help me get back my logical DOS drives.
Thanks again.
Gerald Crimp
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