View Full Version : [ubuntu] Any advanges to using a logical partition?

October 29th, 2008, 06:41 AM
I was wondering if there are any advanges and/or disavanges to using Ubuntu on a logical partition?

October 29th, 2008, 07:05 AM
There is no disadvantage to my knowledge of having ubuntu on a logical partition. You can only have 4 primary partitions, so having a extended partitions with logical partitions can be very useful if you are dual or triple booting.

October 29th, 2008, 04:38 PM
What really is the real difference between a primary and a logical? And does Ubuntu perform better on either or is there really no difference to Ubuntu?

October 29th, 2008, 05:42 PM
From the Arch wiki :

Primary partitions can be bootable, and are limited to 4. If a partitioning scheme requires more than 4 partitions, we are forced to use an extended partition which will contain logical partitions.

Extended partitions are not usable by themselves; they are merely a "container" for logical partitions. If required, a hard disk shall contain only one extended partition; which shall then be sub-divided into logical partitions.

When partitioning a disk, one can observe this numbering scheme by creating primary partitions sda1-3 followed by creating an extended partition, sda4, and subsequently creating logical partition(s) within the extended partition; sda5, sda6, and so on.

October 29th, 2008, 05:50 PM
There should be no difference in anything, except for machines with a very old BIOS.

October 29th, 2008, 06:24 PM
Ah so it doesn't matter at all i guess. Thanks all.

October 30th, 2008, 12:18 AM
Ah so it doesn't matter at all i guess. Thanks all.
No, only if you are running out of primary partitions :p

October 30th, 2008, 12:26 AM
I tend to prefer primary partitions because they are bootable and sometimes easier to manage. One disadvantage to keeping logical partitions around when you don't need them is that you cannot expand a physical partition into a logical partition space. So say if you have an extended partition with a few logical ones inside. You delete the first logical one (at the front of the extended partition) - now in order to expand the physical partition that touches this area, you have to first shrink the extended partition before you can grow the physical partition into the newly emptied space. This leaves more opportunity for a failure to occur (though unlikely, it is still possible - resizing partitions is perhaps the most dangerous operating when it comes to fiddling with partitions).

Details, but hey, you asked.

October 30th, 2008, 01:00 AM
Since I have two hard drives I have made only two "main" partitions. One drive is devoted totally to a primary partition for WinXP. The other has one Extended partition taking up the whole drive (except for a small section of unpartitioned space) with multiple logical partitions inside. Boots/runs fine with no problems. sda is an SATA drive, sdb is a PATA (IDE) drive and the pc boots from the sata (grub is on the sata)....

Disk /dev/sda: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00047d37

Device Boot Start End Blocks Id System
/dev/sda1 1 38626 310263313+ 5 Extended
/dev/sda5 1 781 6273319+ 82 Linux swap / Solaris
/dev/sda6 782 3350 20635461 83 Linux
/dev/sda7 3351 8471 41134401 83 Linux
/dev/sda8 8472 13648 41584221 83 Linux
/dev/sda9 * 13649 26567 103771836 83 Linux
/dev/sda10 26568 29256 21599361 83 Linux

Disk /dev/sdb: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000096f6

Device Boot Start End Blocks Id System
/dev/sdb1 1 9729 78148161 7 HPFS/NTFS