---
title: "dmesg_crit"
slug: "dmesg-crit"
updated: 2025-05-23T15:55:36Z
published: 2025-05-23T15:55:36Z
canonical: "docs.zpesystems.com/dmesg-crit"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zpesystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# dmesg_crit

Reads the last 24 hours of *dmesg* Linux logs and filter for critical errors, saving the results in the system check database.

Issues indicated by this check are application-dependent and should be investigated in a case-by-case basis depending on the application that generated them.

## Command Executed

```plaintext
dmesg -T --since "24 hours ago" | grep -i "Critical"
```

## Issue Identification

1. Navigate to *Tracking :: System :: System Check* and look for dmesg events.

Summary Message: Critical Error in dmesg
2. Drill down into the system check the entry on the System Check Summary Table or click **Last Check.**
3. Check for dmesg_crit error count in the Command Table.

## Example Expected Output

```plaintext
root@nodegrid:~# dmesg -T --since "24 hours ago" | grep -i "Critical"
```

## Example Errors Output

```plaintext
root@nodegrid:~# dmesg -T --since "24 hours ago" | grep -i "Critical"
[11681.875200] blk_update_request: critical medium error, dev sdb, sector 2212099538 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[11685.578885] blk_update_request: critical medium error, dev sdb, sector 2212099538 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[11689.224689] blk_update_request: critical medium error, dev sdb, sector 2212099538 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[12161.978436] blk_update_request: critical medium error, dev sdb, sector 2212099298 op 0x0:(READ) flags 0x80700 phys_seg 32 prio class 0
[12165.740028] blk_update_request: critical medium error, dev sdb, sector 2212099538 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[12169.443682] blk_update_request: critical medium error, dev sdb, sector 2212099538 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
[19226.037858] print_req_error: critical target error, dev sda, sector 8695057304
```