The setup I was using:
<computer> with whatever specs make you happy. :)
2x RAID 5 boxes - these to boxes are mirrored (results in RAID 51)
Nightly backup (whole system) to the RAID 51 setup using whatever backup 
software you are comfortable with.

This gives you:
A backup if the system disk fails
A backup if the database disk fails
A backup if one of 1 RAID 5 disks fail
A backup if one disk (in each RAID box) fails
Actually you still have a functioning backup if ALL of the above happens! At 
once!

You an also look for a RAID 6 box (extra protection for disk failure) or RAID 5 
with ‘hot’ spare.

When you buy disks for the RAID boxes it might be a good idea to buy at least 1 
spare for each box so that they are on hand in case…

To cover the rest of best practice, 5 external drives with capacity large 
enough to hold a copy of the (latest) full backup and updates, which are 
updated once weekly, cycled, and moved off site, and 1 to be cycled and moved 
off site monthly.

N.B. : in most cases you can use SSDs as the RAID drives.

Chip

> On Sep 12, 2020, at 8:48 AM, Mike Kerner via 4D_Tech <[email protected]> 
> wrote:
> 
> I just ordered a new server, Win, because we are using ODBC.  I ordered it
> like the gaming setups - SSD for the OS and mechanical for data.  I hadn't
> thought about adding a third drive for the backups and journal.  Any other
> thoughts/tips?
> 
> On Fri, Sep 11, 2020 at 7:40 PM Randy Kaempen via 4D_Tech <
> [email protected]> wrote:
> 
>> John,
>> 
>>> On Sep 11, 2020, at 5:27 PM, John DeSoi via 4D_Tech <
>> [email protected]> wrote:
>>> 
>>> 
>>>> On Sep 11, 2020, at 3:38 PM, Randy Kaempen via 4D_Tech <
>> [email protected]> wrote:
>>>> 
>>>> I have a client with about a dozen users and a 230GB data file.  They
>> upgraded their server and we got a top of the line Mac Mini.  Since we
>> expect to use it for a number of years, we got the best processor and maxed
>> out the memory.  You can never have too much memory.  We also got the SSD
>> drive so there won’t be any issues with drives crashing.
>>> 
>>> I think SSDs are way more reliable, but I have never heard they are so
>> reliable that a second disk is no longer necessary. Any serious database
>> application needs to keep the database on a different disk from the backup
>> and journal files. I have a similar Mac Mini setup but added the fastest
>> external thunderbolt disk I could find for the journal file and backup
>> files.
>> 
>> Agreed.  For the record, the client that uses the external SSD has their
>> backups and journals on the SSD on the Mac itself, so they _are_ on
>> separate drives.  We also have an offsite backup to Backblaze.  I also have
>> a client who has their Time Machine backup on a Drobo, which gives double
>> backup.
>> 
>> 
>> Randy Kaempen
>> Intellex Corporation
>> 
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