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The FortiGate device may occasionally display a 'log disk error' in the alert console. This message typically indicates that FortiOS has detected a potential issue with the SMART disk on the FortiGate unit.
Check Disk Health:
FortiGate devices have built-in tools to check the health of the storage devices. The Self-Monitoring, Analysis, and Reporting Technology (SMART) attributes for hard drives are used to monitor the reliability of drives and predict potential failures.
- To verify whether the FortiGate device has an available disk, run the following command on the CLI of the FortiGate:
get system status
Example output:
FortiGate # get system status
Version: FortiGate-3700D v7.0.13,build0566,231024 (GA.M)
Log hard disk: Available
(Output is modified for clarity.)
- To display detailed information about the storage devices and partitions on a FortiGate unit, use:
get system storage
== [ HDD1 ]
name: HDD1
== [ HDD2 ]
name: HDD2
- To display information about the storage devices connected to a FortiGate unit, use:
exec disk list
diag hardware deviceinfo disk
diag sys logdisk status
- To display disk usage information for the system's file system, helping administrators understand how disk space is being utilized, use:
fnsysctl df -k
- Finally, The following commands display the SMART stats to help determine if a drive is going to fail:
diag sys logdisk smart - (SMART attribute values are displayed in hexadecimal format)
diagnose hardware smartctl -a /dev/sdb
When the RAW value for one of these five attributes is greater than zero, further investigation is required:
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Attribute
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Description
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SMART 5
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Reallocated Sectors Count.
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SMART 187
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Reported Uncorrectable Errors.
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SMART 188
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Command Timeout.
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SMART 197
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Current Pending Sector Count.
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SMART 198
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Uncorrectable Sector Count.
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Related article:
Troubleshooting Tip: Log disk failure Imminent, prioritize data backup and disk replacement
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