From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031007 Firebird/0.7 Description of problem: It doesn seems possible to change a drive partition table without having to either unmount all of its partition or to reboot before creating a filesystem on the new partition. man fdisk says:" Long ago it used to be necessary to reboot after the use of fdisk. I do not think this is the case anymore - indeed, rebooting too quickly might cause loss of not-yet-written data. Note that both the kernel and the disk hardware may buffer data." But it doesnt work. I have been told that this step (rebooting or unmounting all partition) was not necessary with parted. I still have the same trouble: ##################################### [root@dhcp-111 root]# fdisk -l Disk /dev/hda: 255 heads, 63 sectors, 1216 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 395 3068415 83 Linux /dev/hda3 396 460 522112+ 82 Linux swap /dev/hda4 461 1216 6072570 5 Extended /dev/hda5 461 492 257008+ 83 Linux /dev/hda6 493 524 257008+ 83 Linux /dev/hda7 525 537 104391 83 Linux /dev/hda8 538 550 104391 83 Linux Disk /dev/hdb: 255 heads, 63 sectors, 2434 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/hdb1 1 637 5116671 83 Linux /dev/hdb2 * 638 2370 13920322+ 83 Linux [root@dhcp-111 root]# parted /dev/hda GNU Parted 1.4.16 Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This program is free software, covered by the GNU General Public License. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Using /dev/hda Warning: The operating system thinks the geometry on /dev/hda is 1216/255/63. Therefore, cylinder 1024 ends at 8032.499M. You should check that this matches the BIOS geometry before using this program. (parted) p Disk geometry for /dev/hda: 0.000-9541.546 megabytes Disk label type: msdos Minor Start End Type Filesystem Flags 1 0.031 101.975 primary ext3 boot 2 101.975 3098.474 primary ext3 3 3098.474 3608.349 primary linux-swap 4 3608.350 9538.593 extended 5 3608.380 3859.365 logical ext3 6 3859.396 4110.380 logical ext3 7 4110.412 4212.355 logical ext3 8 4212.387 4314.331 logical ext3 (parted) mkpart logical 4315 9000 Error: Unknown file system type. (parted) mkpart logical ext3 4315 9000 (parted) q Warning: The kernel was unable to re-read the partition table on /dev/hda (Device or resource busy). This means Linux knows nothing about any modifications you made. You should reboot your computer before doing anything with /dev/hda. [root@dhcp-111 root]# fdisk -l Disk /dev/hda: 255 heads, 63 sectors, 1216 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 395 3068415 83 Linux /dev/hda3 396 460 522112+ 82 Linux swap /dev/hda4 461 1216 6072570 5 Extended /dev/hda5 461 492 257008+ 83 Linux /dev/hda6 493 524 257008+ 83 Linux /dev/hda7 525 537 104391 83 Linux /dev/hda8 538 550 104391 83 Linux /dev/hda9 551 1147 4795371 83 Linux Disk /dev/hdb: 255 heads, 63 sectors, 2434 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/hdb1 1 637 5116671 83 Linux /dev/hdb2 * 638 2370 13920322+ 83 Linux [root@dhcp-111 root]# mke2fs -j /dev/hda9 mke2fs 1.26 (3-Feb-2002) mke2fs: Device size reported to be zero. Invalid partition specified, or partition table wasn't reread after running fdisk, due to a modified partition being busy and in use. You may need to reboot to re-read your partition table. [root@dhcp-111 root]# ##################################### Version-Release number of selected component (if applicable): parted-1.4.16-8 kernel-2.4.9-e.38 e2fsprogs-1.26-1.72 How reproducible: Always Steps to Reproduce: 1.install a machine and leave some space on a disk that has one partition mounted in the system 2. use parted to create a new partition. 3. try to created a ext3 filesystem on this new partition. Actual Results: parted says: Warning: The kernel was unable to re-read the partition table on /dev/hda (Device or resource busy). This means Linux knows nothing about any modifications you made. You should reboot your computer before doing anything with /dev/hda. mke2fs says: Device size reported to be zero. Invalid partition specified, or partition table wasn't reread after running fdisk, due to a modified partition being busy and in use. You may need to reboot to re-read your partition table. Expected Results: new partition with ext3 filesystem shall be created. Additional info: i was not able to reproduce the problem while shrinking an already existing partition. If i reboot on the machine used in the above example, i can do "resize 9 4314.362 4400". I still have the error message telling i m supposed to reboot, but if i try to recreate an ext3 filesystem , i dont have the mke2fs error message.
parted 1.4 doesn't have support for the newer ioctl, it is supported in parted 1.6 which is present in RHEL 3.