Thanks everyone for the input on your configs. Very helpful! I have a question regarding primary fast storage and secondary storage for HSM and backups.
Currently /opt/zimbra is 270GBs on my server and does not include backups. Backups are 190GB on a separate volume. I have 45 users right now with 15GB quotas although most folks are around 5GBs. My target is 60 users max at 15GB so 900GB storage needed there.
My question is how can I look at my current setup and figure out how much fast primary storage I need? Fast meaning RAID1/RAID10 on 15K SAS drives and secondary storage would be on near-line SAS RAID1/RAID10.