⚝
One Hat Cyber Team
⚝
Your IP:
216.73.216.23
Server IP:
178.33.27.10
Server:
Linux cpanel.dev-unit.com 3.10.0-1160.108.1.el7.x86_64 #1 SMP Thu Jan 25 16:17:31 UTC 2024 x86_64
Server Software:
Apache/2.4.57 (Unix) OpenSSL/1.0.2k-fips
PHP Version:
8.2.11
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Dir :
~
/
usr
/
local
/
src
/
netdata
/
health
/
guides
/
btrfs
/
View File Name :
btrfs_device_read_errors.md
### Understand the alert This alert monitors the number of BTRFS read errors on a device. If you receive this alert, it means that your system has encountered at least one BTRFS read error in the last 10 minutes. ### What are BTRFS read errors? BTRFS (B-Tree File System) is a modern file system designed for Linux. BTRFS read errors are instances where the file system fails to read data from a device. This can occur due to various reasons like hardware failure, file system corruption, or disk problems. ### Troubleshoot the alert 1. Check system logs for BTRFS errors Review the output from the following command to identify any BTRFS errors: ``` sudo journalctl -k | grep -i BTRFS ``` 2. Identify the affected BTRFS device and partition List all BTRFS devices with their respective information by running the following command: ``` sudo btrfs filesystem show ``` 3. Perform a BTRFS filesystem check To check the integrity of the BTRFS file system, run the following command, replacing `<device>` with the affected device path: ``` sudo btrfs check --readonly <device> ``` Note: Be careful when using the `--repair` option, as it may cause data loss. It is recommended to take a backup before attempting a repair. 4. Verify the disk health Check the disk health using SMART tools to determine if there are any hardware issues. This can be done by first installing `smartmontools` if not already installed: ``` sudo apt install smartmontools ``` Then running a disk health check on the affected device: ``` sudo smartctl -a <device> ``` 5. Analyze the read error patterns If the read errors are happening consistently or increasing, consider replacing the affected device with a new one or adding redundancy to the system by using RAID or BTRFS built-in features. ### Useful resources 1. [smartmontools documentation](https://www.smartmontools.org/)