Depends on some factors :
1° - Casing Space : 4 x 2"1/2 vs 2 x 3"1/2. Enough space ?
2° - Power for feeding your HDD ? (See Datasheet for power consumption)
3° - Heat : should be close as they are both 7200rpm.
4° - Perfomance : R10 seems to be a little bit faster vs R1. You won't see any difference, only if you perform regular read/write operations with a lot of small size files. What is the purpose for those HDD ?
5° - Cost : 3"1/2 are cheaper than 2"1/2, more reliable too IMHO.
I'll go for R1 with 2 x 2Tb for DATA + 1 x SSD for OS if you've got enough $.
My input, hope this helps
1° - Casing Space : 4 x 2"1/2 vs 2 x 3"1/2. Enough space ?
2° - Power for feeding your HDD ? (See Datasheet for power consumption)
3° - Heat : should be close as they are both 7200rpm.
4° - Perfomance : R10 seems to be a little bit faster vs R1. You won't see any difference, only if you perform regular read/write operations with a lot of small size files. What is the purpose for those HDD ?
5° - Cost : 3"1/2 are cheaper than 2"1/2, more reliable too IMHO.
I'll go for R1 with 2 x 2Tb for DATA + 1 x SSD for OS if you've got enough $.
My input, hope this helps
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if your goal is general use and not server critical speed and redundancy then a raid 1 (mirror) will be perfectly fine.
use motherboard raid to save cost.
buy a pci express if you want better speed.
i recommend a SSD for boot/apps and the raid 1 for storage.
i would recommend 3.5" WD black HD sata6.0 . not green. not blue.
2.5" drives are faster: Raptors, scsi, SSD
2.5" laptop harddrives are slow but reliable. use if its a mobile build.
if you want speed and redundancy use raid 0 + 1. using 4 drives.
raid 5 and 10 are made for the lowest number of drives for redundancy/speed for large business with many many drives to help reduce cost.
not good for consumer use. you must have the correct disk saved and the rest of the raid must work to use the backup hard drive.
in raid 1 :swap out a full mirror every so often to keep a full backup.
use motherboard raid to save cost.
buy a pci express if you want better speed.
i recommend a SSD for boot/apps and the raid 1 for storage.
i would recommend 3.5" WD black HD sata6.0 . not green. not blue.
2.5" drives are faster: Raptors, scsi, SSD
2.5" laptop harddrives are slow but reliable. use if its a mobile build.
if you want speed and redundancy use raid 0 + 1. using 4 drives.
raid 5 and 10 are made for the lowest number of drives for redundancy/speed for large business with many many drives to help reduce cost.
not good for consumer use. you must have the correct disk saved and the rest of the raid must work to use the backup hard drive.
in raid 1 :swap out a full mirror every so often to keep a full backup.
oh and just figured I would mention this, RAID is not a backup solution. If you have data that you want to make sure its secure you will still need to back it up to something else and then securely store that something else somewhere else. RAID just ups your chances a bit of not losing everything when an HD does fail.
It's actually the other way around.
There is a reason performance hard drives are all 2.5" and that also goes for SAS drives. The mechanical header has to move more on a 3.5" drive and is inherently slower but has higher density to compensate. Of course, with ordinary drives you might as well go for the higher density and cheaper 3.5" drives.
Reliability aside I am sure both drives have the same MBTF rating of around 1,500,000 hours, unless you invest in server-grade drives.
To the original poster, what do you need it for?
If anything I would just get an Solid State Drive for the boot drive / applications folder or if you run any form of Unix, you could easily make a ZFS+ RAID-Z1 drive with 4 or more hard drives.
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