It's not even funny. At best you may be able to pull 300-400 IOPS out of a two drive 7200RPM RAID0 array. Even the most low performance SATA SSD you can imagine can do 10.000 IOPS. A class A1 SD card is faster, except in sequential transfers. Even simple PCIe NVMe drives do 100.000 easily.I want to get a very high capacity HDD and was thinking i should get 2 for RAID 0 speed. It is cheaper than 1 8TB SSD but how fast RAID HDDs and how fast compared to 1 SSD?
You never mentioned a usage scenario. You still don't. No on the RAID 0. Just another point of failure with little gains. Get what you can afford. I've got a second 2TB NVMe drive for games. I've got four spinners as thrash drives. If you need the large capacity drives for your work then you need to do a cost/benefit analysis to determine if it's worth it to have faster load times. If your employer is paying for it, then 8TB SSD it is.Amusing, i never mention anything about boots.
HDDs is for storage media and I need fast reads hence about RAID question since SSDs above 4tb has absurd prices.
In a two-drive RAID-0 array, the probability of drive A failing is mostly independent of drive B failing. Either one of the drives failing kills the array. So the probability of the array as a whole failing is approximately twice the probability of a single drive failing, and this trend continues as you add more drives to the array. RAID-0 isn't just a way of aggregating drive capacity, it's also a way of sacrificing reliability to gain sequential throughput.Can you explain what is failure in RAID because 1 HDD can also fail or failures in RAID are different and occur more often than in simple HDDs.
Contradicting yourself within the same paragraph is not conducive to a productive discussion. In order to make an informed decision about what storage setup makes sense, we need to consider:Not looking into cost/benefit. [...] but will never do that since i think the price is (again) absurd.
They work pretty well, but I have 6 of those in a raidz2 (with 192GB RAM and a Optane ZIL).RAID0 is not recommended. One disk fails, there goes your data.
Those drives look good and have a good warranty but comparing to SSD it will be worse if you care about speed. Even with 2 of them in RAID0 you'd probably only get 500MB/s sequential read with a much higher probability for data lost. Almost all NVMe SSDs can get 5-10x that in sequential read scenarios... for speed there really is no comparison.
I do have 4 of those 14TB Toshiba drives set up in RAIDZ1, but I am under no illusions as to their speed. It's for when you really do not need speed
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