Hi,
I've got a box with two drives in it. Hda is dedicated to
Windows and hdb is currently running RH 8.0.
I want to shrink the hdb2 partition to make room for a new
/boot and root to install RH 9.0. I know I need to convert
the ext3 filesys to ext2, shrink it to about 20GB and then
reduce the partition size without making it smaller than the
reduced filesystem. I want to use the same swap partition
for both RH 8.0 and RH 9.0.
But I'm somewhat confused - mostly by the differences in the
Start and End values indicated by parted, fdisk and sfdisk.
Is what I want to do reasonable? And if so, can anyone shed
some light on why the values seem somewhat different and how
I should choose new values for parted and fdisk?
'parted' says,
Using /dev/hdb
Error: The partition table on /dev/hdb is inconsistent. There are
many reasons why this might be the case. However, the most likely
reason is that Linux detected the BIOS geometry for /dev/hdb
incorrectly. GNU Parted suspects the real geometry should be
79656/16/63 (not 4998/255/63). You should check with your BIOS
first, as this may not be correct. You can inform Linux by adding
the parameter hdb=79656,16,63 to the command line. See the LILO or
GRUB documentation for more information. If you think Parted's
suggested geometry is correct, you may select Ignore to continue
(and fix Linux later). Otherwise, select Cancel (and fix Linux
and/or the BIOS now).
Ignore Cancel ? i
Information: The operating system thinks the geometry on /dev/hdb
is 79656/16/63. Therefore, cylinder 1024 ends at 503.999M.
'Parted's 'print' command says:
Disk geometry for /dev/hdb: 0.000-39205.687 megabytes
Disk label type: msdos
Minor Start End Type Filesystem Flags
1 0.031 99.914 primary ext3 boot
2 99.914 38181.937 primary ext3
3 38181.938 39205.687 primary linux-swap
The 'p' command in 'fdisk /dev/hdb' says:
Disk /dev/hdb: 16 heads, 63 sectors, 79656 cylinders
Units = cylinders of 1008 * 512 bytes
Device Boot Start End Blocks Id System
/dev/hdb1 * 1 203 102280+ 83 Linux
/dev/hdb2 204 77576 38995992 83 Linux
/dev/hdb3 77577 79656 1048320 82 Linux swap
And, the cmd 'sfdisk --no-reread /dev/hdb' generates this output:
Disk /dev/hdb: 4998 cylinders, 255 heads, 63 sectors/track
Old situation:
Warning: The partition table looks like it was made
for C/H/S=*/16/63 (instead of 4998/255/63).
For this listing I'll assume that geometry.
Units = cylinders of 516096 bytes, blocks of 1024 bytes,
counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/hdb1 * 0+ 202 203- 102280+ 83 Linux
/dev/hdb2 203 77575 77373 38995992 83 Linux
/dev/hdb3 77576 79655 2080 1048320 82 Linux swap
/dev/hdb4 0 - 0 0 0 Empty
Thanks,
Doug Wyatt
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