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<!--
title: "Storage devices monitoring with Netdata"
custom_edit_url: "https://github.com/netdata/netdata/edit/master/collectors/python.d.plugin/smartd_log/README.md"
sidebar_label: "S.M.A.R.T. attributes"
learn_status: "Published"
learn_topic_type: "References"
learn_rel_path: "References/Collectors references/Devices"
-->
# Storage devices monitoring with Netdata
Monitors `smartd` log files to collect HDD/SSD S.M.A.R.T attributes.
## Requirements
- `smartmontools`
It produces following charts for SCSI devices:
1. **Read Error Corrected**
2. **Read Error Uncorrected**
3. **Write Error Corrected**
4. **Write Error Uncorrected**
5. **Verify Error Corrected**
6. **Verify Error Uncorrected**
7. **Temperature**
For ATA devices:
1. **Read Error Rate**
2. **Seek Error Rate**
3. **Soft Read Error Rate**
4. **Write Error Rate**
5. **SATA Interface Downshift**
6. **UDMA CRC Error Count**
7. **Throughput Performance**
8. **Seek Time Performance**
9. **Start/Stop Count**
10. **Power-On Hours Count**
11. **Power Cycle Count**
12. **Unexpected Power Loss**
13. **Spin-Up Time**
14. **Spin-up Retries**
15. **Calibration Retries**
16. **Temperature**
17. **Reallocated Sectors Count**
18. **Reserved Block Count**
19. **Program Fail Count**
20. **Erase Fail Count**
21. **Wear Leveller Worst Case Erase Count**
22. **Unused Reserved NAND Blocks**
23. **Reallocation Event Count**
24. **Current Pending Sector Count**
25. **Offline Uncorrectable Sector Count**
26. **Percent Lifetime Used**
## prerequisite
`smartd` must be running with `-A` option to write smartd attribute information to files.
For this you need to set `smartd_opts` (or `SMARTD_ARGS`, check _smartd.service_ content) in `/etc/default/smartmontools`:
```
# dump smartd attrs info every 600 seconds
smartd_opts="-A /var/log/smartd/ -i 600"
```
You may need to create the smartd directory before smartd will write to it:
```sh
mkdir -p /var/log/smartd
```
Otherwise, all the smartd `.csv` files may get written to `/var/lib/smartmontools` (default location). See also <https://linux.die.net/man/8/smartd> for more info on the `-A --attributelog=PREFIX` command.
`smartd` appends logs at every run. It's strongly recommended to use `logrotate` for smartd files.
## Configuration
Edit the `python.d/smartd_log.conf` configuration file using `edit-config` from the Netdata [config
directory](https://github.com/netdata/netdata/blob/master/docs/configure/nodes.md), which is typically at `/etc/netdata`.
```bash
cd /etc/netdata # Replace this path with your Netdata config directory, if different
sudo ./edit-config python.d/smartd_log.conf
```
```yaml
local:
log_path : '/var/log/smartd/'
```
If no configuration is given, module will attempt to read log files in `/var/log/smartd/` directory.
---
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