Question Raid 2 ssd of 1T, or just use 1 ssd of 2T? (for gaming storage)

Dec 5, 2019
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Im planning to buy samsung 860 evo for gaming storage,and im not sure if i should get 1 SSD of 2TB so i will not fill it up quicly
or 2 SSD of 1T and raid them so if one SSD dies i can still recover some data
 
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Honestly, I wouldn't go with RAID. Get a 2TB drive . . sometimes it's cheaper to get a pair of 1TB drives, and while there's slightly more management involved with using them as simply two separate drives, I'd go that route instead of doing any sort of RAID setup.
 
Dec 5, 2019
13
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10
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Honestly, I wouldn't go with RAID. Get a 2TB drive . . sometimes it's cheaper to get a pair of 1TB drives, and while there's slightly more management involved with using them as simply two separate drives, I'd go that route instead of doing any sort of RAID setup.
Why wouldnt you raid? isnt it right that if one SSD dies u can still recover data from the second one?
 
If you set up a mirrored RAID, yes. But, of course, then you have only 1 TB of actual storage.

But, what are you doing that you're expecting the SSD to die that easily? What is your use case?

The reason I ask is that, in 24 years, I have only had ONE hard drive fail on me that wasn't my fault. That was in the late 90s.
The other hard drive that failed was in an open case, connected to a motherboard with an extra-long IDE cable, and I dropped it while it was connected and running.

Are you simply trying to avoid the (remote) possibility of having to download games again?
 

jimmysmitty

Champion
Moderator
Raid 1: redundancy, basically two 1TB drives show up as a single 1TB drive and the drives are mirrored so if one fails your data is safe. However performance is slower than a single drive.

Raid 0: performance, basically two 1 TB drives would show up as a single 2TB drive. Data is stripped across the drives, meaning parts of the data are written to both drives. If a drive fails, all data is lost.

I would not recommend RAID of any kind for a SSD. SSDs do not benefit as heavily from Raid 0 as HDDs did and it basically doubles your rate of failure. Raid is basically only useful in servers where they utilize more advanced multiple disk redundancy Raids like Raid 6.
 

USAFRet

Titan
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Mar 16, 2013
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No RAID.
Either RAID 1 or RAID 0.

RAID 1 is mirrored. For uptime, not data protection.
The OS and you the user only sees a single 'volume'. Accidental deletion, corruption, ransomware...that file is gone gone gone.
There is no 'second copy'.
1TB+1TB+RAID 1 = 1TB RAID array.

There are much better ways of data protection.


RAID 0 - Striped. Used to be somewhat beneficial for HDD's as a speed benefit.
Data is striped across both drives. If one drive dies or gets corrupted, all data across all drives is gone.
And with SSD's, it completely fails in its main purpose - "speed".
http://www.tomshardware.com/reviews/ssd-raid-benchmark,3485.html
http://www.tomshardware.com/reviews/samsung-950-pro-256gb-raid-report,4449.html
 
Reactions: jimmysmitty

Blitz Hacker

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Jul 17, 2015
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What's the difference between Raid 0 and Raid 1
(1TB x 2)
Raid 0 is disk striping.
Raid 1 is disk mirroring
Raid 5 (if supported) is disk striping with parity.

Raid 0: Breaks your data into equal parts across any number of drives (2 or more) Idea here is the more drives the faster it goes. (5 drives in raid 0, means your writing (and reading) from 5 drives at the same time, with a slight overhead) Problem. Because it writes the data evenly across all of the drives. If one drive fails. You lose your data on everything on the raid array. So increasing number of disks increases speed, also increases failure rate. Theoretically when a SSD fails from too many writes most will go into a permanent read only mode, so you could pull your data off without losing any. Raid 0 is for speed and more speed. I wouldn't keep family photos without backups on a raid 0 array.

Raid 1: Disk mirroring. (2 drives) What you do to one drive, you do to the other. Problem. You lose half your drives (and space). So if you used this setup on two 1TB M.2 NVME SSD's, you would only have 1 drive accessible and 1 TB of space (Minus obvious partitioning space loss)

Raid 5: (3+ Drives) I don't see much support for this anymore. It's essentially Raid 0, but uses one drive for a parity calculation.

Data = D
Parity = P

Disk 1 | Disk 2 | Disk 3

1| D | P | D
2| D | D | P
3| P | D | D
4| D | P | D

Essentially if a single drive fails in the array, you can rebuild (regenerate) the missing disk by replacing the dead drive with a new drive of equal or greater size and making it regenerate the missing data ..

If Disk 3 for example failed .. on the 1st row (data stripe) you lose the data from Disk 3. but with the Data on Disk 1, and the parity mathematical calculations that remain from Disk 2 that were ran on the two data chunks for that stripe. It can essentially 'triangulate' with the data and the math calculations left on Disk 1 and 2, to recreate the data for Disk 3.

On stripe #2 disk 1 and disk 2 carry all the data, so no data is lost just the parity calculation which is discarded (and regenerated from the intact data for the stripe when regenerating the lost volume)

As you can see the data and parity calculations on the data are staggered across all of the drives so this is possible. It's not quite as fast as raid 0 as there is some latency and overhead when writing to the disks due to some calculations being ran, but aside from some chipset processor usage (minimal) it's not noticeable unless measured by benchmarks, but there is a slight difference. You also (in a 3 disk Raid5 Array) lose 1/3 of your total space to parity calculations. A good compromise between Raid0 and Raid1. But it's only fault tolerant for a single drive failure.. You can use more drives for more speed aswell.

For whatever reason most of the new mainboards don't support Raid5 anymore, raid0 and raid1 are pretty popular.

TLDR: That's what the typical non enterprise raids are (there are tons more) I would personally Raid 0 the drives and purchase some 2tb - 4tb sata SSD or a Sata Harddrive for mass storage depending on budget.
Alternatively purchase one 2tb SSD drive and one cheap mass storage sata SSD or HDD and just don't worry about raid. The drive endurance (and speed in some cases) are alot higher on the higher capacity SSD's which is a real concern if you are a power user and/or don't want to keep replacing drives.
 

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