[Bug 269662] Re: Creating a new partition

[Paul Boddie]

I imagine that the reporter has now moved on from this situation.
However, people in similar situations should see the following page for
ways to refresh the kernel's view of the partition table after adding
partitions:

http://serverfault.com/questions/36038/reread-partition-table-without-
rebooting

Running partprobe on the disk device worked for me:

sudo partprobe /dev/sda

I imagine that the need to do this originates in some behavioural change
in the 2.6.24 kernel or earlier.

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https://bugs.launchpad.net/bugs/269662

Title:
  Creating a new partition

Status in “udev” package in Ubuntu:
  Invalid

Bug description:
  After creating a new (extend) partition in my hard disk using cfdisk I
  tried to format it, using mkfs.ext3.

  #mkfs.ext3 /dev/sda7
  mke2fs 1.40.8 (13-Mar-2008)
  Could not stat /dev/sda7 --- No such file or directory

  The device apparently does not exist; did you specify it correctly?

  # fdisk -l /dev/sda

  Disk /dev/sda: 160.0 GB, 160041885696 bytes
  255 heads, 63 sectors/track, 19457 cylinders
  Units = cylinders of 16065 * 512 = 8225280 bytes
  Disk identifier: 0xaf264508

     Device Boot      Start         End      Blocks   Id  System
  /dev/sda1   *           1          12       96358+  83  Linux
  /dev/sda2              13         134      979965   82  Linux swap / Solaris
  /dev/sda3             135        3781    29294527+  83  Linux
  /dev/sda4            3782       11424    61392397+   5  Extended
  /dev/sda5            3782        7428    29294496   83  Linux
  /dev/sda6            7429       10816    27214078+  83  Linux
  /dev/sda7           10817       11424     4883728+  83  Linux

  
  I'm using Ubuntu 8.04.1 with 2.6.24-19-386.

  I also tried to create a new device (sda7).

  # ls -la /dev/sda*
  brw-rw---- 1 root disk 8, 0 2008-09-13 00:09 /dev/sda
  brw-rw---- 1 root disk 8, 1 2008-09-12 20:49 /dev/sda1
  brw-rw---- 1 root disk 8, 2 2008-09-12 20:49 /dev/sda2
  brw-rw---- 1 root disk 8, 3 2008-09-12 20:49 /dev/sda3
  brw-rw---- 1 root disk 8, 4 2008-09-12 20:49 /dev/sda4
  brw-rw---- 1 root disk 8, 5 2008-09-12 23:50 /dev/sda5
  brw-rw---- 1 root disk 8, 6 2008-09-12 23:51 /dev/sda6

  # cd /dev
  # mknod -m 664 sda7 b 8 7
  # ls -la sda7
  brw-rw-r-- 1 root root 8, 7 2008-09-13 00:16 sda7

  With mkfs.ext3 the error change but still doesn't work.

  # mkfs.ext3 /dev/sda7
  mke2fs 1.40.8 (13-Mar-2008)
  mkfs.ext3: No such device or address while trying to determine filesystem size

  I can use (format) the new partition after a system reboot but I don't
  know reboot my machine always. I think this could be a problem with
  udev, but I don't know exactly.

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