I'm setting up a new Zimbra server virtual environment for 800 mailboxes with a maximum size of 6 GB per mail box.
The attachment size limit is 20 MB due to sending ACAD drawings back and forth.
Typically receive 100 messages per day per user and they send 10 to 20 messages out per user.

Using Rhel-server 5.8 and ZCS 7.1.4

Planned setup;
2 VMware hosts
2 LDAP servers
2 MTA/Proxy servers
6 Mailbox servers with 2 TB store per server.
the mailbox servers with have 2 vCPUs and 16 GB RAM

1. What is the size limit for data stores?

2. Can you have more than 1 data store per mailbox server.

3. Is there a better way?

Thanks for your help