Exchange Server 2013 Multi Role Server Hardware Setup

Is below a good ok setup for a multi role exchange server??
Any suggestions?

1.8TB of data (databases split to 18 databases at 100GB each), nightly archive runs so databases will not grow past 100GB each
25 GB of logs daily, logs cleared nightly by backup

Dell PowerEdge R620
Dual Xeon E5-2620
128GB RAM
Single PERC710P RAID Controller

10 x 900GB 10K RPM Drives (2 Volumes)
Volume 1: OS/Apps/Logs - 4 x 900GB, RAID 10 = 1.5TB
Volume 2: Databases - 6 x 900GB, RAID 10 = 2.5TB