Smartctl Open Device Dev Sda Failed Dell Or Megaraid Controller Please Try Adding 39d Megaraid N 39 Extra Quality Portable Jun 2026

# Correct syntax to check disk with ID 0 on the first RAID adapter smartctl -i -d megaraid,0 /dev/sda

Hardware RAID controllers (such as Dell PERC, LSI MegaRAID, Avago) create virtual disk devices (e.g., /dev/sda , /dev/sdb , /dev/sdc ) that represent logical RAID volumes rather than individual physical disks. When you run smartctl -a /dev/sda without any extra parameters, the utility sees that the device is managed by a known RAID controller driver and returns the error message you see. # Correct syntax to check disk with ID

| Attribute | ID | Raw Value Meaning | Action Threshold | | :--- | :--- | :--- | :--- | | | 5 | Number of sectors remapped to spare area | > 0 – Monitor closely; rising count indicates media degradation | | Current_Pending_Sector | 197 | Sectors that are unstable but not yet remapped | > 0 – Immediate attention required; often precedes drive failure | | Offline_Uncorrectable | 198 | Sectors that could not be corrected during offline testing | > 0 – More serious than pending sectors; consider replacement | | UDMA_CRC_Error_Count | 199 | Interface communication errors (cable, backplane, or power issues) | Repeated increase – Likely a cabling/connection problem, not the disk itself | storcli show Use code with caution

storcli (Storage Command Line Tool) is the modern utility for Broadcom/LSI/Dell MegaRAID controllers. storcli show Use code with caution. (Take note of your controller ID, usually c0 ) List all physical drives: storcli /c0/eall/sall show Use code with caution. Once you have the device index ( N

Once you have identified the target integer ( N ), test the physical drive query explicitly via the logical device block: sudo smartctl -a /dev/sda -d megaraid,0 Use code with caution.

Once you have the device index ( N ), use the following command structure: sudo smartctl -a -d megaraid,N /dev/sda Use code with caution.

: On some systems, you may need to use /dev/bus/0 instead of /dev/sda to ensure stability. Recommended Monitoring Configuration