Are you running 64 or 32 bit? And what Edition of SQL Server? Standard?

I'm wondering if you're getting memory paged out while CHECKDB is running.

Which SP level of 2005 are you at? There was a bug that could possibly cause this: http://kbalertz.com/949199/Error-message-queries-database-SNAPSHOT-isolation-level-enabled-Server-deallocate.aspx

In terms of why it takes a long time to run - what...

Well first off, you only need to run the CHECKDB part - it does all the other stuff too.

By running too long, you mean it's running longer than usual -...

Neat - but ATTACH_REBUILD_LOG only works if the databases wasn't cleanly shutdown - so your msdb must have been. I wonder why it thought it was suspect then - suspect...

Nope - it doesn't take locks in 2000 either and your description of the algorithm is way off - it scans the transaction log for changes and reconciles them with...

That syntax should work fine on SQL 2005. Can you do a select @@version in the same script and send all the results?

That tells me you're not running on SQL Server 2005 - as does the name of your backup file.

There are two corruption forums - one for 2005+ and one for...

Can you post the exact T-SQL you're running that generates the error please?

It never checks the log file - there isn't anything in SQL Server that you can run that will check the log file in the same way as DBCC CHECKDB...

All the scripts are designed for use directly in a query window or through osql/sqlcmd.

Hmm - that's right - msdb can't be put into emergency mode using the ALTER DATABASE syntax. To get it to work you'll need to update the system tables manually...

Basically no. Unless you can force it to restore using WITH CONTINUE_AFTER_ERROR - that's your last option.

Nope - just be aware that when you restore it, the database will be in the same state as when you backed it up - i.e. it will be in...

Well, first off you probably are going to lose some data from the database being suspect - that's what backups are for. You've probably already realized this, but if you...

Btw - you've got corruption in your database and you may be looking at data loss. Why are you waiting for a maintenance window to run CHECKDB? You need to...