Exchange 2010 backup

Hello All;

So we are new to Symantec Backup Exec 2012.  We are using it to back up our exchange server 2010 & I'm looking for best practices.

I've read over: http://www.symantec.com/business/support/index?page=content&id=HOWTO21796 but still running into questions.

Exchange 2010:
4 different databases

• Archive
• Elevated
• Staff
• Client

Our jobs are setup nightly for FULL backups every night for each different database.  BUT we are only copying the databases.

• 6PM - Full -> Archive
• 7PM - Full -> Elevated
• 8PM - Full -> Client
• 10PM - Full -> Staff

My worry is that we are not backing up drives, logs, transactions logs, etc. - We have 4 Drives and they are seperate for databses and transaction logs. 

Should I be backing up the drives on an different job nightly ?  Just looking for other people insight as we are new to hosting exchange.

thanks for your help.