BOL is the best place to check doubts like yours.

Even in sql server central you will find article for this.

Taskpad view gets data from sysfiles

Select CONVERT(VARCHAR(12),getdate(),111),Name,Size,FileName from Pubs.dbo.sysfiles

Before Detach, have you executed any queries to see for sure database was

up and running. Why I am saying this is 'I think the backup was good' 

mean you  are not...

It is safe to cancel  at any time.

It works as single transaction, probably it can take some time for cancellation as well.

Welcome to sql server community.

Here are few sites from where you can get good articles to add to your knowledge.

http://www.sqlservercentral.com

http://www.sql-server-performance.com/

http://www.databasejournal.com

http://www.windowsitpro.com

vyaskn.tripod.com

Hope this helps

Detach DB Fileà Copy File à Attach DB File

This option is always available, but this is...

In sql2005 size specifications are 

Database size 1,048,516 TB

File size (db) 32 TB and file size (log) 32 TB

so you do not need to increase the size, probably you are having...

A maintenance plan does not overwrite the old backup file. It creates a new backup file, and then deletes the old backup file after creating the new one....

Sarang Bobde,

This is very interesting solution , but works only if you have rights for Enterprise manager.

your statement quoted above is misleading ,