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Creating New Logical Partitions
I'm currently working on a lab for a linux based course and the question asked me:
"Create a new logical partition (NOT a logical volume!)- minimum 5G, leaving at least 10G free space in the extended partition."
So, what I have done:
$ su
# fdisk /dev/sda
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): p
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x1e16c543
Device Boot Start End Blocks Id System
/dev/sda1 * 1 39 313236 83 Linux
/dev/sda2 40 60801 488070765 5 Extended
/dev/sda5 40 78 313236 83 Linux
/dev/sda6 79 3266 25600000 8e Linux LVM
/dev/sda7 3266 6453 25600000 8e Linux LVM
/dev/sda8 6453 9640 25600000 8e Linux LVM
/dev/sda9 9640 12827 25600000 8e Linux LVM
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l
First cylinder (12827-60801, default 12827):
Using default value 12827
Last cylinder, +cylinders or +size{K,M,G} (12827-60801, default 60801): +5G
Command (m for help): p
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x1e16c543
Device Boot Start End Blocks Id System
/dev/sda1 * 1 39 313236 83 Linux
/dev/sda2 40 60801 488070765 5 Extended
/dev/sda5 40 78 313236 83 Linux
/dev/sda6 79 3266 25600000 8e Linux LVM
/dev/sda7 3266 6453 25600000 8e Linux LVM
/dev/sda8 6453 9640 25600000 8e Linux LVM
/dev/sda9 9640 12827 25600000 8e Linux LVM
/dev/sda10 12827 13480 5247284+ 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@f13host dev]# partprobe
Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). As a result, it may not reflect all of your changes until after reboot.
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
[root@f13host dev]# partprobe -s
Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). As a result, it may not reflect all of your changes until after reboot.
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
The next step wants me to add that partition as a PV (physical volume) into the the existing VG (volume group). However since the kernel isn't reflecting the changes I am unable to do this step.
If you want to see the lab for yourself it is on-line for anyone to see at: <http://zenit.senecac.on.ca/wiki/index.php/OPS235_Lab_4>
I'm not asking for anyone to do my homework for me (this isn't the first time I have asked for help nor would it be the first that I am kicked from a forum for asking a similarly structured question..) I just need a push in the right direction. Any help is greatly appreciated.
-Steven
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