Update Failure this morning

[Şerban S.]

[...] How do you plan your multi instance partitions? I got the recommendation from a webpage showing how to install multiple instances of Linux [...]

Hello!
It is a poor strategy that "recommended" one. The author, seems to be a rookie.
Here is the interesting part:
(1) Linux is capable to use the same SWAP partition, regardless the number or type of installation. So, you only need ONE SWAP PARTITION.
(2) Second aspect, is REUSING THE /home partition.
The last thing I would like, is to do again and again the same settings for all applications I am running. So, I use a /home partition. This holds all the specific config and user data for all apps I use.
(3) Now, let's go to the main issue: Any Linux distro, uses at most 14 GB of disk space, considering that you make a heavy use of lots of apps. Otherwise, it takes some 8 - 9 GB. So, You need at most 16 GB/ installation.
(4) At setup time, you need to set up the default mounted partitions. And here it comes the /home partition. Use it, without formatting. You need to know exactly the name of the partition (Say... /dev/sda6). In order to avoid heavy lifting trouble, I use the ext2 FS for the /home, so I can see exactely which one is the /home. Even more, I use a certain size for this partition: 60 GB. I usually use some 6 - 8 GB of it, but sometimes I need more, so it fits my needs. In case you make a heavy use of /home, you might need to reserve more than 60 GB. I prefer using dedicated partitions for my projects, such as /projects, /video, /mydat, etc. This allows me to backup as needed, instead of making a single huge backup.
And in the end...
Now, assuming that you want to have a lot of installations, you need to do some basic maths, as follows:
N Linuxes x 15 GB = ? (N = ?)
SWAP = ?
/home = ?
/datapartition1 = ?
/datapartition2 = ?
...
------------------
TOTALS = [0,95 x DriveSize] = ?
It would be great to know exactly how much space uses each FULL installation, since this will help save some disk space and this sometimes means more than 1 - 2 GB. Might be up to 5 - 8 GB/ each installation!

Good luck!
Best regards!