Depending on a use case, SSD wears out at a different rate. In harsh environments like RAID, cache, and heavy access you need to look at endurance rating. Bigger means a longer lifespan and not a decreased performance even with a heaviest access.
Apart from that, you could look at MTBF which is life expectancy. This do not ensure good performance at its peak times, but it indicates life expectancy on a regular use case without pushing its capabilities.
And IOPS will mean how quickly this SSD can respond to a request. This is useful for web servers and similar use cases.
Here is a comparison with market leaders in SSD:
| Price/TB | Price | Capacity | MTBF | read/write | IOPS | Watt | Endurance | url |
| £295.31 | £567 | 1.92TB | 1.5m hours MTBF | 530/500 | 60-98K | 3.2 | 1.3 |
Synology Enterprise SATA SSD SAT5200-1920G 2.5″ SATA SSD 1.92TB
|
| £311.46 | £299 | 960GB | 1.5m hours MTBF | 530/500 | 67-98K | 3.2 | 1.3 |
Synology Enterprise SATA SSD SAT5200-960G 2.5″ SATA SSD 960GB
|
| £364.58 | £175 | 480GB | 1.5m hours MTBF | 530/500 | 55-95K | 3.2 | 1.3 |
Synology Enterprise SATA SSD SAT5200-480G 2.5″ SATA SSD 480GB
|
| Price/TB | Price | Capacity | MTBF | read/write | IOPS | Watt | Endurance | url |
| £130 | £65 | 500GB | 2M hours MTTF | 560/530 | 85-95K | <3.35 | 0.38 |
Western Digital WD Red SA500 SSD WDS500G1R0A 2.5″ SATA 6Gb/s 500GB SSD
|
| £145.5 | £291 | 2TB | 2M hours MTTF | 560/530 | 85-95K | <3.80 | 0.36 |
Western Digital WD Red SA500 SSD WDS200T1R0A 2.5″ SATA 6Gb/s 2TB SSD
|
| £147 | £147 | 1TB | 2M hours MTTF | 560/530 | 85-95K | <3.75 | 0.33 |
Western Digital WD Red SA500 SSD WDS100T1R0A 2.5″ SATA 6Gb/s 1TB SSD
|
| £147.25 | £589 | 4TB | 2M hours MTTF | 560/530 | 82-95K | <3.80 | 0.34 |
Western Digital WD Red SA500 SSD WDS400T1R0A 2.5″ SATA 6Gb/s 4TB SSD
|
| Price/TB | Price | Capacity | MTBF | read/write | IOPS | Watt | Endurance | url |
| £181.77 | £349 | 1.92TB | 2M hours MTBF | 560/535 | 45-90K | 3.4 | 1 |
Seagate Ironwolf 110 SSD ZA1920NM10011 2.5″ SATA 6Gb/s 1.92TB SSD
|
| £189.84 | £729 | 3.84TB | 2M hours MTBF | 560/535 | 45-85K | 3.5 | 1 |
Seagate Ironwolf 110 SSD ZA3840NM10011 2.5″ SATA 6Gb/s 3.84TB SSD
|
| £217.71 | £209 | 960GB | 2M hours MTBF | 560/535 | 55-90K | 3.2 | 1 |
Seagate Ironwolf 110 SSD ZA960NM10011 2.5″ SATA 6Gb/s 960GB SSD
|
| £254.17 | £122 | 480GB | 2M hours MTBF | 560/535 | 40-75K | 2.7 | 1 |
Seagate Ironwolf 110 SSD ZA480NM10011 2.5″ SATA 6Gb/s 480GB SSD
|
| £325 | £78 | 240GB | 2M hours MTBF | 560/345 | 30-55K | 2.3 | 1 |
Seagate Ironwolf 110 SSD ZA240NM10011 2.5″ SATA 6Gb/s 240GB SSD
|
| Price/TB | Price | Capacity | MTBF | read/write | IOPS | Watt | Endurance | url |
| £125 | £250 | 2TB | 1.5m hours MTBF | <550/<520 | <90-98K | 3 | 0.33 |
Samsung SSD 860 EVO MZ-76E2T0B/EU 2.5″ SATA 6Gb/s 2TB SSD
|
| £125 | £500 | 4TB | 1.5m hours MTBF | <550/<520 | <90-98K | 3 | 0.33 |
Samsung SSD 860 EVO MZ-76E4T0B/EU 2.5″ SATA 6Gb/s 4TB SSD
|
| £130 | £130 | 1TB | 1.5m hours MTBF | <550/<520 | <90-98K | 3 | 0.33 |
Samsung SSD 860 EVO MZ-76E1T0B/EU 2.5″ SATA 6Gb/s 1TB SSD
|
| £136 | £68 | 500GB | 1.5m hours MTBF | <550/<520 | <90-98K | 2.5 | 0.33 |
Samsung SSD 860 EVO MZ-76E500B/EU 2.5″ SATA 6Gb/s 500GB SSD
|
| £220 | £55 | 250GB | 1.5m hours MTBF | <550/<520 | <90-98K | 2.2 | 0.33 |
Samsung SSD 860 EVO MZ-76E250B/EU 2.5″ SATA 6Gb/s 250GB SSD
|
| Price/TB | Price | Capacity | MTBF | read/write | IOPS | Watt | Endurance | url |
| £199.75 | £799 | 4TB | 1.5m hours MTBF | <560/<530 | <90-100K | 4.5 | 0.66 |
Samsung SSD 860 Pro MZ-76P4T0B/EU 2.5″ SATA 6Gb/s 4TB SSD
|
| £205.5 | £411 | 2TB | 1.5m hours MTBF | <560/<530 | <90-100K | 4.5 | 0.66 |
Samsung SSD 860 Pro MZ-76P2T0B/EU 2.5″ SATA 6Gb/s 2TB SSD
|
| £234 | £234 | 1TB | 1.5m hours MTBF | <560/<530 | <90-100K | 4.5 | 0.66 |
Samsung SSD 860 Pro MZ-76P1T0B/EU 2.5″ SATA 6Gb/s 1TB SSD
|
| £269.53 | £138 | 512GB | 1.5m hours MTBF | <560/<530 | <90-100K | 4 | 0.64 |
Samsung SSD 860 Pro MZ-76P512B/EU 2.5″ SATA 6Gb/s 512GB SSD
|
| £300.78 | £77 | 256GB | 1.5m hours MTBF | <560/<530 | <90-100K | 3.3 | 0.64 |
Samsung SSD 860 Pro MZ-76P256B/EU 2.5″ SATA 6Gb/s 256GB SSD
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