I plan to upgrade my Intel RST Software RAID1 setup with 2 internal SATA drives to something more versatile:
- Drives need to be external (they have to reside in an enclosure connected to PC via eSATA or USB3)
- Enclosure has to be for 4 drives to allow for expansion.
- Enclosure must support drives of arbitrary size (to allow for future models), i.e. it should not have a preset maximum size limit.
- I was thinking to go with 2 6Tb 7200rpm UltrStar HGST Drives for a start.
My current setup is as follows: Intel RST Software RAID1 using 2 3Tb WD Caviar Green (internal)
Sequential Read : 42.796 MB/s Sequential Write : 62.639 MB/s Random Read 512KB : 16.237 MB/s Random Write 512KB : 43.364 MB/s
Test : 500 MB [D: 93.7% (2618.6/2794.4 GB)] (x3) Date : 2015/07/02 12:30:11 OS : Windows 8.1 Pro [6.3 Build 9600] (x64)
In that regard I have some questions:
What data duplication solution I should choose, given that the new drives will reside in an external enclosure connected via eSATA or USB3? Software RAID? Hardware RAID (provided by enclosure as in CFI-B7843JD 4Bay)? Or Windows Storage Spaces (I plan on using Windows 8/10)? What about performance impact and best reliability? I am looking for a solution with at least 1 copy (i.e. as in RAID 1).
Which kind of enclosure should I choose? Any recommendations, given my needs?
Finally, do I absolutely need to go with 7200 rpm drives, or slower drives would suffice? I was looking to at least double my current speeds.
EDIT: For redundancy I am looking only for 1-to-1 mirroring without striping, i.e. so that 1 drive is identical to another one and can be used by itself in another computer/enclosure.