My OS is windows 7 x64. I was use postgres 8.4, and all databases are in
postgres/8.4/data. Yesterday, I reinstalled my os system, but I found I can't install postgres 8.4 anymore (there is always an error when installing), so I installed postgres 9.1.
But I don't know how to reuse the data of postgres 8.x. I tried to copy the data from
postgres/9.1/data, but the postgres service won't start.
Is there any way to reuse that. Since I have a lot of data in
postgres/8.4/data, I can't loose them.