The most reliable hard drives in the world

Cloud backup provider Backblaze has released its hard drive reliability statistics for the second quarter of 2019.

The company compared active hard drives used in its operations from Seagate, Western Digital, Toshiba, and HGST to compile the report.

Reliability was measured as an annualised failure rate, calculated using the number of drive failures relative to the number of active drive days for each disk.

Backblaze recorded the number of failures for each hard drive from 1 April to 30 June 2019, extrapolating the annualised failure rate from this data.

The cloud provider noted that it has discontinued the last of the Western Digital 6TB hard drives this quarter, meaning that it no longer uses any hard drives from Western Digital.

“When Backblaze was first starting out, the first data drives we deployed en masse were Western Digital Green 1 TB drives,” the company said.

“So, it is with a bit of sadness to see our Western Digital data drive count go to zero. We hope to see them again in the future.”

The company tested a total of 108,461 hard drives this quarter, equating to a total of 9,636,394 days worth of hard drive operation across all products.


Q2 2019 Failure Rates

Model Drive Count Drive Days Drive Failures Annualized Failure Rate
4TB Hard Drives
Toshiba MD04ABA400V 99 9,009 0 0.00%
HGST HMS5C4040BLE640 12,752 1,160,287 15 0.47%
HGST HMS5C4040ALE640 2,639 235,280 5 0.78%
Seagate ST6000DX000 886 81,039 4 1.80%
Seagate ST4000DM000 19,750 1,781,822 104 2.13%
6TB Hard Drives
8TB Hard Drives
HGST HUH728080ALE600 1,001 90,691 2 0.80%
Seagate ST8000DM002 9,875 898,837 25 1.02%
Seagate ST8000NM0055 14,380 1,307,819 64 1.79%
10TB Hard Drives
Seagate ST10000NM0086 1,200 109,222 2 0.67%
12TB Hard Drives
HGST HUH721212ALN604 9,609 645,966 5 0.28%
HGST HUH721212ALE600 520 47,320 1 0.77%
Seagate ST12000NM0007 34,710 3,158,082 247 2.85%
14TB Hard Drives
Toshiba MG07ACA14TA 1,220 111,020 0 0.00%

Lifetime Failure Rates

Model Drive Count Failure Rate
4TB Hard Drives
HGST HMS5C4040BLE640 12,752 0.45%
HGST HMS5C4040ALE640 2,639 0.51%
Toshiba MD04ABA400V 99 0.84%
Seagate ST4000DM000 19,570 2.72%
6TB Hard Drives
Seagate ST6000DX000 886 1.05%
8TB Hard Drives
HGST HUH728080ALE600 1,001 0.84%
Seagate ST8000NM0055 14,380 1.16%
Seagate ST8000DM002 9,875 1.02%
10TB Hard Drives
Seagate ST10000NM0086 1,200 0.56%
12TB Hard Drives
HGST HUH721212ALN604 9,609 0.37%
Seagate ST12000NM0007 34,710 1.89%
HGST HUH721212ALE604 520 1.19%
14TB Hard Drives
Toshiba MG07ACA14TA 1,220 0.78%

Now read: Every major BIOS vendor uses insecure drivers – Report

Latest news

Partner Content

Show comments

Recommended

Share this article
The most reliable hard drives in the world