Hi :)
Ok, sorry for the looong post! Really it's just the last paragraph that is
important. The rest assumes you don't know how to get there.
First, find out which partitions do what. Hopefully you already know
this or can guess from looking at GPartEd on a LiveCd/Usb (or whatever) of
Ubuntu 10.04. From the top taskbar that is
System - Administration - Gparted
{ Incidentally it might be just me but i find that when i boot up a Cd/Usb of
10.04 or 10.10 and try the "Try it" option to get to the LiveCd session it just
hangs. While hung i can access the release notes and that opens a web-browser
so i can do most sundry office things right there, ie before getting into the
OS. To get a proper LiveCd/Usb session i have to choose the "Install now" and
then use the back button until i get to the "Try it" screen again. Then the
"Try it" option works just fine with no problems. With 8.10, 9.04 and 9.10
they all seemed to work right first time. }
Anyhow, start a normal install but when you get to the "Partitioning" or
"Allocate Drive Space" section (it's about choose the bottom option. It's
something like "Advanced" or "Manual" or "Something else". The top options are
something like "Wipe whole drive" and "Install alongside existing OSes". I
think the default is to install alongside.
The "Advanced" or "Manual" option rescans the hard-drive so there is a scary
pause and scarier activity from the drive. Then there is a fairly primitive
gui partition editor that should show the same info as Gparted. "Edit" or
"Change" the appropriate partitions to do the same thing they were doing in the
11.04 and keep the same format.
If there are 4 partitions and you keep the Windows that was on the machine then
it's probably something like
sda1 = ntfs for Windows
sda2 = ext3 for /
sda3 = ext3 for /home
sda4 = linux-swap for swap
Note that an "Extended partition" is basically a bucket that allows the drive
to have more than 4 partitions. hard-drives formatted to the Ms-dos spec can
only have 4 "Primary partitions" but 1 of those can be an "Extended Partition"
that can then contain a LOT of "Logical Partitions" which are typically
numbered from sda5 even if that skips a few numbers. So you would get
something like
sda1 = ntfs for Windows, about half the drive
sda2 = Extended
sda4 = ext3 for / perhaps around 4-8Gb. i tend to give 8Gb jic
sda5 = ext3 for /home
sda6 = linux-swap for swap, maybe about 4Gb? Should be =Ram or = 2xRam. Just
over Ram is about ideal size.
Obviously if swap is getting used a lot (ie in low ram machines or very busy
ones) it would be more sensible to place it first (or 2nd) but by default it's
often last. On an Ide/Sata drive the read/write speed is faster near the
beginning of the drive but on SSDs it doesn't make any difference.
If there is no separate /home don't worry. The /home folder will just be
inside the / partition and in that case the / partition is likely to be very
large. The linux-swap partition is still likely to be last.
The CRUCIAL bit is to make sure that in the column "Format?" that all
partitions are UNticked as you don't want any of them to get formatted (well,
the swap will be automatically but that is ok). It's the formatting that wipes
out data&settings.
Regards from
Tom :)
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