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Swap areas

A

ArisVer

Golden Member
Today I have tried to install linux Mint.
On the first disk I have W7 with its two partitions, and made another two partitions for mint, /(root) and swap.
On the second disk I already have debian xfce with two partitions, again /(root) and swap.

The installer seems to reckognise the swap area of the second disk and also wants to format it. Why is it so? Isn't there anything written in the swap area that is needed by the debian system? Do I need only one swap area for two or more systems?
 
Partition table has type id for each partition. Swap, LVM, filesystems, RAID, etc have their own ids. That id is the first cue that setup and boot make use of.

Swap has some format, so it must contain something. It might be that hibernation or such makes use of swap, but if one shuts down cleanly then that should not matter. I think that the boot procedure can check whether swap has something useful. On new install there should not be, so the installer plays safe and offers to clean up the swap.

One swap should be enough.
 
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