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Copyright 1996-2024 by TSW (Nikolay Tuzhilin)
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Western digital HDDs
Model Number | Caviar Green WD15EADS | WD Green WD20EZRX | WD Red Plus WD60EFZX |
Recording technology | | CMR | CMR |
Interface | SATA 3 Gb/s | SATA 6 Gb/s | SATA 6 Gb/s |
Formatted capacity | 1.5TB | 2TB | 6TB |
Form factor | 3.5-inch | 3.5-inch | 3.5-inch |
Native command queuing | Yes | Yes | Yes |
Advanced Format (AF) | No | Yes | Yes |
RoHS compliant | Yes | Yes | Yes |
Internal transfer rate | 110 MB/s | 147 MB/s | 185 MB/s |
Cache | 32 MB | 64 MB | 128 MB |
RPM | 5400 | 5400 | 5640 |
Platters/heads | 3/6 | 2/4 | 4/8 |
Load/unload cycles | 300,000 | 300,000 | 600,000 |
Non-recoverable errors per bits read | <1 in 1015 | <1 in 1014 | <1 in 1014 |
MTBF (hours) | 650,000 | 1,000,000 | 1,000,000 |
Workload rate (TB/year) | | 180 | 180 |
12VDC ±5% (A, peak) | 1.6 | 1.73 | 1.75 |
5VDC ±5% (A, peak) average power requirements (W): |
Read/write | 7.4 | 4.1 | 6.2 |
Idle | 4.0 | 3.0 | 4.1 |
Standby and sleep | 0.97 | 0.4 | 0.4 |
Temperature (°C) operating | 0 to 60 | 0 to 60 | 0 to 65 |
Shock (Gs) Operating | 65 | 30 | 70 |
Acoustics (dBA): |
Idle | 25 | 23 | 25 |
Seek (average) | 29 | 27 | 30 |
Physical Dimensions: |
Height (mm, max) | 26.1 | 26.1 | 26.1 |
Length (mm, max) | 147 | 147 | 147 |
Width (mm, ± .01) | 101.6 | 101.6 | 101.6 |
Weight (kg, ± 3%) | 0.73 | 0.60 | 0.57 |
HDD Tune benchmark |
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CrystalDiskMark benchmark (iops): |
Read SEQ 1MB (Q8/Q1) | | 120 / 120 | 195 / 195 |
Read RND 4KB (Q32/Q1) | | 530 / 140 | 440 / 140 |
Write SEQ 1MB (Q8/Q1) | | 110 / 110 | 190 / 190 |
Write RND 4KB (Q32/Q1) | | 480 / 430 | 635 / 540 |
Western Digital SSDs
Model Number | WD Blue SN550
WDBA3V0010BNC-WRSN | WD Black SN750
WDS500G3XHC |
Interface | PCIe Gen3 8Gb/s | PCIe Gen3 8 Gb/s, up to 4 Lanes |
Formatted capacity | 1TB | 500GB |
Performance: |
Sequential Read up to (MB/s) | 2,400 | 3,400 |
Sequential Write up to (MB/s) | 1,950 | 2,900 |
Random Read 4KB up to (IOPS) | 410K | 480K |
Random Write 4KB up to (IOPS) | 405K | 550K |
MTTF (hours) | 1.7M | 1.7M |
Endurance (TBW) | 600 | 1,200 |
Power: |
Avg. Active Power (mW) | 75 | |
Low Power (PS3) | 20mW | 100mW |
Sleep (PS4) (low power) | 5mW | 5mW |
Maximum Operating Power | 4.9W | 2.8A |
Temperature (°C) operating | 0 to 70 | 0 to 70 |
Shock, operating | 1,500G @ 0.5msec half sine | |
Physical Dimensions: |
Form factor | M.2 2280 | M.2 2280 D5-M with heatsink |
Length (mm, max) | 80 | 80 |
Width (mm, ± .015) | 22 | 24.2 |
Height (mm, max) | 2.38 | 8.10 |
Weight (g, ± 1g) | 6.5 | 9.57 |
CrystalDiskMark benchmark (iops): |
Read SEQ 1MB (Q8/Q1) | 2300/ 1900 | 3300 / 1600 |
Read RND 4KB (Q32/Q1) | 420000 / 12700 | 200000 / 7800 |
Write SEQ 1MB (Q8/Q1) | 1900 / 1900 | 2400 / 1400 |
Write RND 4KB (Q32/Q1) | 400000 / 44000 | 25500 / 26500 |
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