HGST Hard Drives
================

This is a list of all tested HGST hard drive models and their MTBFs. See more
info on reliability test in the [README](https://github.com/bsdhw/SMART).

Contents
--------

1. [ HDD by Model  ](#hdd-by-model)
2. [ HDD by Family ](#hdd-by-family)

HDD by Model
------------

Please take all columns into account when reading the table. Pay attention on the
number of tested samples and power-on days. Simultaneous high values of both MTBF
and errors are possible if only rare drives in the subset encounter errors.

Days - avg. days per sample,
Err  - avg. errors per sample,
MTBF - avg. MTBF in years per sample.

| MFG       | Model              | Size   | Samples | Days  | Err   | MTBF |
|-----------|--------------------|--------|---------|-------|-------|------|
| HGST      | HUS724020ALA640    | 2 TB   | 11      | 2551  | 0     | 6.99   |
| HGST      | HDN724040ALE640    | 4 TB   | 41      | 2322  | 69    | 5.88   |
| HGST      | HDN724030ALE640    | 3 TB   | 9       | 2037  | 0     | 5.58   |
| HGST      | HTE721010A9E630    | 1 TB   | 3       | 1849  | 0     | 5.07   |
| HGST      | HUS726T4TALA6L4    | 4 TB   | 8       | 1557  | 0     | 4.27   |
| HGST      | HUH721212ALE601    | 12 TB  | 14      | 1405  | 1     | 3.63   |
| HGST      | HTE725032A7E630    | 320 GB | 11      | 1446  | 6     | 3.55   |
| HGST      | HDN726040ALE614    | 4 TB   | 15      | 1509  | 2     | 3.51   |
| HGST      | HUS726040ALN610    | 4 TB   | 3       | 1197  | 0     | 3.28   |
| HGST      | HDN728080ALE604    | 8 TB   | 7       | 1182  | 0     | 3.24   |
| HGST      | HUS724040ALA640    | 4 TB   | 5       | 1058  | 0     | 2.90   |
| HGST      | HUS726T4TALA6L1    | 4 TB   | 4       | 981   | 0     | 2.69   |
| HGST      | HDN726060ALE614    | 6 TB   | 2       | 1449  | 1     | 2.65   |
| HGST      | HDN721010ALE604    | 10 TB  | 3       | 916   | 0     | 2.51   |
| HGST      | HUS726020ALA610    | 2 TB   | 2       | 822   | 0     | 2.25   |
| HGST      | HTS725050A7E635... | 500 GB | 2       | 1092  | 38    | 2.24   |
| HGST      | HUS726T4TALN6L4    | 4 TB   | 2       | 754   | 0     | 2.07   |
| HGST      | HUS722T1TALA600    | 1 TB   | 2       | 713   | 0     | 1.95   |
| HGST      | HUS726040ALE610    | 4 TB   | 3       | 1030  | 464   | 1.68   |
| HGST      | HTE545032A7E380    | 320 GB | 4       | 628   | 4     | 1.34   |
| HGST      | HMS5C4040BLE640    | 4 TB   | 10      | 455   | 0     | 1.25   |
| HGST      | HTS721010A9E630    | 1 TB   | 38      | 597   | 223   | 1.24   |
| HGST      | HUS728T8TALE6L4    | 8 TB   | 12      | 440   | 0     | 1.21   |
| HGST      | HUS726060ALE614    | 6 TB   | 4       | 430   | 0     | 1.18   |
| HGST      | HUS722T2TALA604    | 2 TB   | 6       | 505   | 3     | 1.13   |
| HGST      | HTS725032A7E630    | 320 GB | 10      | 723   | 15    | 1.12   |
| HGST      | HUS726020ALE610    | 2 TB   | 2       | 380   | 0     | 1.04   |
| HGST      | HTS541010B7E610    | 1 TB   | 8       | 357   | 0     | 0.98   |
| HGST      | HTS541010A9E680    | 1 TB   | 21      | 462   | 586   | 0.96   |
| HGST      | HTS545050A7E680    | 500 GB | 17      | 371   | 181   | 0.79   |
| HGST      | HTS541010A7E630    | 1 TB   | 2       | 511   | 512   | 0.54   |
| HGST      | HTS725050A7E630    | 500 GB | 32      | 619   | 557   | 0.53   |
| HGST      | HUS722T1TALA604    | 1 TB   | 6       | 169   | 0     | 0.47   |
| HGST      | HTS541075A7E630    | 752 GB | 3       | 881   | 697   | 0.42   |
| HGST      | HTS545050A7E380    | 500 GB | 9       | 489   | 526   | 0.35   |
| HGST      | HUH721010ALE604    | 10 TB  | 2       | 102   | 0     | 0.28   |
| HGST      | HUS726060ALE610    | 6 TB   | 3       | 48    | 0     | 0.13   |
| HGST      | HTS545032A7E380    | 320 GB | 4       | 402   | 12    | 0.11   |
| HGST      | HTS541075A9E680    | 752 GB | 4       | 795   | 1057  | 0.10   |
| HGST      | HUS726T6TALE6L1    | 6 TB   | 2       | 21    | 0     | 0.06   |
| HGST      | HMS5C4040ALE640    | 4 TB   | 10      | 0     | 0     | 0.00   |

HDD by Family
-------------

Please take all columns into account when reading the table. Pay attention on the
number of tested samples and power-on days. Simultaneous high values of both MTBF
and errors are possible if only rare drives in the subset encounter errors.

Days - avg. days per sample,
Err  - avg. errors per sample,
MTBF - avg. MTBF in years per sample.

| MFG       | Family                 | Models | Samples | Days  | Err   | MTBF |
|-----------|------------------------|--------|---------|-------|-------|------|
| HGST      | Ultrastar 7K4000       | 2      | 16      | 2084  | 0     | 5.71   |
| HGST      | Deskstar NAS           | 6      | 77      | 1949  | 37    | 4.93   |
| HGST      | Ultrastar DC HC520 ... | 1      | 14      | 1405  | 1     | 3.63   |
| HGST      | Ultrastar DC HC310     | 3      | 14      | 1173  | 0     | 3.22   |
| HGST      | Ultrastar 7K6000       | 7      | 19      | 656   | 74    | 1.62   |
| HGST      | Travelstar 7K1000      | 2      | 41      | 688   | 207   | 1.52   |
| HGST      | Travelstar Z7K500      | 4      | 55      | 820   | 329   | 1.30   |
| HGST      | Ultrastar HC310/320    | 1      | 12      | 440   | 0     | 1.21   |
| HGST      | Ultrastar 7K2          | 3      | 14      | 391   | 2     | 0.96   |
| HGST      | Travelstar 5K1000      | 2      | 25      | 515   | 661   | 0.82   |
| HGST      | Travelstar Z5K1000     | 3      | 13      | 502   | 240   | 0.78   |
| HGST      | Travelstar Z5K500      | 4      | 34      | 436   | 231   | 0.66   |
| HGST      | MegaScale 4000         | 2      | 20      | 227   | 0     | 0.62   |
| HGST      | Ultrastar He10         | 1      | 2       | 102   | 0     | 0.28   |