Editing Openai/6907d01e-3d70-800e-82fe-6be907ca0499 (section)

=== Assistant: These logs are MegaRAID controller event logs — diagnostic records from a RAID controller likely a Dell PERC or LSI Meg… ===
These logs are MegaRAID controller event logs — diagnostic records from a RAID controller (likely a Dell PERC or LSI MegaRAID). They document system events such as power-on initialization, battery checks, drive insertions, firmware operations, and error sense codes from physical disks (PD = Physical Drive).

Here’s a summary of what’s happening in your log:

===== 🧠 1. System Power Cycle / Reboot Events =====

You have multiple sequences of nearly identical log blocks (e.g., IDs 2913–2973, 2971–2999), which each begin with:

<syntaxhighlight>MegaRAID firmware initialization started
MegaRAID firmware version: 2.100.03-1062
Package version: 12.10.1-0001
Board Revision: A03
Battery Present
PD inserted...

</syntaxhighlight>

and end with:

<syntaxhighlight>Time established since power on...
Patrol Read resumed

</syntaxhighlight>

✅ Interpretation:
The controller is restarting repeatedly — possibly after each power cycle or crash. Each block represents a fresh initialization of the RAID controller.

===== 🔋 2. Battery and Cache Status =====

Messages like:

<syntaxhighlight>Battery Present
Battery temperature is normal
Current capacity of the battery is above threshold
Battery started charging / Battery charge complete

</syntaxhighlight>

show the Battery Backup Unit (BBU) for your RAID cache is functioning correctly.

✅ Interpretation:
No issue with the cache battery; it’s cycling normally.

===== 💾 3. Drive Insertions and Certification Warnings =====

You have repeated sequences of:

<syntaxhighlight>PD inserted: --:--:0 ... --:--:5
Drive is not certified: --:--:0, etc.
Device inserted Device Type: Disk

</syntaxhighlight>

⚠️ Interpretation:
The RAID controller is repeatedly detecting all six drives as newly inserted and flagging some as “not certified.”

This typically means:
* Drives are non-Dell / non-LSI certified (often third-party SATA/SAS disks).
* Or, the backplane or connection is briefly dropping and re-detecting the drives during controller reset.

===== ⚠️ 4. Unexpected Sense Codes =====

You have multiple “Unexpected sense” entries:

<syntaxhighlight>Unexpected sense: PD = --:--:4, CDB = 0x4d ...
Sense = 0x72 0x05 0x24 ...

</syntaxhighlight>

These are SCSI sense codes, with:
* 0x72 0x05 0x24 = Illegal Request – Invalid field in CDB
* 0x70 0x00 0x06 = Unit Attention – Not Ready or Medium Change

✅ Interpretation:
The controller is sending a command to the drive that it doesn’t support, or the drive is resetting during communication.
This can happen during:
* RAID controller firmware resets
* Power-on drive spin-up
* Non-certified or incompatible drives

===== 📅 5. Timeline Summary =====

From your logs:

| Approx Time          | Event Summary                                                                   |
| -------------------- | ------------------------------------------------------------------------------- |
| 12:31–12:57 (Oct 31) | Controller reset, multiple sense errors, then shutdown command                  |
| 20:14–20:37 (Oct 31) | Controller restarted multiple times, re-initialized drives, resumed patrol read |
| Repeated patterns    | Indicate several RAID controller reboots or system reboots within the same day  |

===== 🧩 6. Likely Root Causes =====

Based on all messages:
# RAID controller resets — possibly due to: - Firmware issue - Power instability - Faulty or overloaded backplane connection
# Non-certified or mismatched drives are repeatedly flagged.
# Communication errors (Unexpected sense) appear during drive spin-up or controller reinit.

===== 🛠️ 7. Recommended Actions =====
* ✅ Update RAID controller firmware (latest version from vendor).
* ✅ Check backplane and power connections to ensure drives aren’t briefly disconnecting.
* ⚠️ Use certified drives if available (or disable certification check if allowed).
* 🔍 Monitor temperature and power supply voltages.
* 📋 Export MegaRAID event logs (MegaCLI -AdpEventLog -GetEvents -f events.log -aALL) for a full diagnostic trace.

Would you like me to analyze the reboot pattern (e.g., how often the controller restarts and if it’s cyclical) or decode the SCSI sense data in detail to see which drives are behaving abnormally?