To RAID or not to RAID, that is the question...

Be aware that RAID is not for backup. RAID gives you drive redundancy, that is if one of the drive fails, you can replace it with a minimal downtime. But if your RAID controller fails, or your file system get corrupted, you may lose all your data.
I would recommend a NAS (Network Attached Storage, Synology or QNAP are good brands), ideally on a wired Gigabit network. The NAS doesn't have to be configured in RAID and you should attach USB disks to it for backup.

 

Someone has mention to me about ZFS with FireWire bus
With proper controller, or Box like UF8-R5J you can daisy chain these five to gether and have a reliable ZFS storage

 

Can you tell me the reason using DatOptic?
I know this is a 2 man company.
I know this company is not a manufacture, nor they have engineers to develop RAID, tray, box, etc.
They simply pick and choose the components from the market and puzzle the solution.
How do they provide LONG term support and guarantee the RAID.
Do they have real anti vibration test result, FCC, UL, and the most important not relying on Datoptic's vendor support such as Areca, Lycom, iStar, etc?

 

rebuild UF8-R5J

Have you tried to rebuild the RAID?
Saying RAID 5?

 

For raids to work, the drives have to be the same size (or partitioned in the same way). Most NAS boxes will only read from two drives (not partitions) for RAIDs; in which case you might need to get some new drives (identical ones are best).

If you're going to use a NAS (even if data is stored on a HD connected to Mac mini server) then you'll want to use Gigabit ethernet to connect all of the devices on the same network when transferring files (otherwise it's DEAD slow as you'd be limited to 100MBits/s = 12.5MB/s (max). You can't just use your old router and a gigabit switch for this - you need to have a gigabit router as all data transfer initiations are sent through the router so that the router knows where the data is being sent to & from.


In terms of RAID setups for 5TB of data, you are better off using RAID 5. It allows 2 of your hard drives to fail (if you're using 5) without loosing all of your data. A RAID 1 + 1 setup would keep your data redundant but with 4 x 1TB drives you'd only have 1TB of storage. You'd be better off with RAID 1 + 0 over 1+1 because at least that way you're getting improvements in data transfer rate (0) and redundancy on the data with 2TB of storage

 

Incorrect, as long as the computer and NAS are connected to a gigabit switch then the speed of the router does not matter. The routing of the packets is done inside the switch hardware, the router has nothing to do with the routing of LAN traffic.

 

RAID 5 only allows 1 drive to fail, RAID 6 is dual disk redundant