On 2020-02-20 11:22, Oliver Marugg wrote: > Hi > > I’ve got a Supermicro 5028D desktop server with 5 identical SATA SSDs, > there is no HBA no RAID card in. The purpose of the server is intended > as web/smtp and some vmm vms (os plus /home & /var storage). > What are your suggestions or best practices configuring the device > arrangement (eg. sofraid(4), bio(4),bioctl(4) OS 2x on 2x ssd raid1, > data 3xssd raid5 or 1x single ssd for OS and 4x ssd raid5/10 or better > ideas)? > > many thanks > -oliver >
set it up as you need it... If you think your description is anything close to specific for specific recommendations, you need to get out more. Everything you said could vary in demand by many orders of magnitude, except for the model number the server...a curious thing to be specific about. E-mail is one of those things that's really hard to get a good backup of, as it changes minute by minute and is considered fairly important, so I'd consider a three disk RAID1 for the mail store, as a disk system failure invariably means "lost data", even with frequent backups. Three disk RAID1 gives you a simple disk structure that can tolerate a disk failure and still provide redundancy. (some people will tell you that RAID1 is only two disks. These people are wrong, but often include HW RAID controller makers. Three disk RAID1 examples are in the man pages). As for the rest...it's a matter of how much space you need and how much down time you can tolerate, and how you are set up to deal with that downtime. And I'm assuming you aren't combining external and internal services on one box. I suspect that's a bad assumption. And even after much careful analysis it's a bit of a guess. Sometimes you guess wrong. So keep your design flexible and be willing and able to say, "Well, this isn't working, let's rebuild it with the knowledge we now have". This idea that you have to have the perfect build the first time out is ... well, just wrong. Nick.
