ATTO Disk Benchmark
The ATTO disk benchmark tests the drives read and write speeds using gradually larger size files. For these tests, the ATTO program was set to run from its smallest to largest value (.5KB to 8192KB) and the total length was set to 256MB. The test program then spits out an extrapolated performance figure in megabytes per second.
atto r - Silicon Power Armor A85 5TB: Big on Value and Performance
atto w - Silicon Power Armor A85 5TB: Big on Value and Performance
AS-SSD

AS-SSD is designed to quickly test the performance of your drives. Currently, the program allows to measure sequential and small 4K read/write speeds as well as 4K file speed at a queue depth of 6. While its primary goal is to accurately test Solid State Drives, it does equally well on all storage mediums it just takes longer to run each test as each test reads or writes 1GB of data.
asd r - Silicon Power Armor A85 5TB: Big on Value and Performance
asd w - Silicon Power Armor A85 5TB: Big on Value and Performance

Crystal DiskMark
Crystal DiskMark is designed to quickly test the performance of your hard drives. Currently, the program allows to measure sequential and random read/write speeds; and allows you to set the number of tests iterations to run. We left the number of tests at 5 and size at 100MB.
cdm r - Silicon Power Armor A85 5TB: Big on Value and Performance
cdm w - Silicon Power Armor A85 5TB: Big on Value and Performance