PowerPath: Linux host logs 'kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x80081272, proc name: osysmond.bin'
Summary: PowerPath: Linux host logs 'kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x80081272, proc name: osysmond.bin'
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Symptoms
Linux host logs "kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd" error messages every hour.
Error msg:
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x80081272, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x1268, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x2285, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x80081272, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x1268, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x1268, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x2285, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x80081272, proc name: osysmond.bin
Nov 9 04:10:46 scmdbs01 kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x1268, proc name: osysmond.bin
# ps -efl | grep osysmond.bin
4 S root 5190 1 1 -40 - - 210592 hrtime Nov10 ? 00:10:59 /u01/app/11.2.0/grid/bin/osysmond.bin
Cause
These error messages show that osysmond.bin has issued ioctls with invalid commands to a character device, /dev/emcpower.
11499 0 crw-r--r-- 1 root root 10, 57 Nov 10 23:51 emcpower
Since /dev/emcpower is internally used for a bridge between the kernel and the userspace (e.g., powermt config), it is not a PowerPath failure.
11499 0 crw-r--r-- 1 root root 10, 57 Nov 10 23:51 emcpower
Since /dev/emcpower is internally used for a bridge between the kernel and the userspace (e.g., powermt config), it is not a PowerPath failure.
Resolution
These messages cause no impact and can be ignored.
Additional Information
Refer to article PowerPath: Linux host logs 'kernel: Error:emcp:emcp_pseudo_ctl_ioctl: Invalid cmd 0x5401' when host agent starts for a similar error message.
Affected Products
PowerPath for LinuxProducts
PowerPath for LinuxArticle Properties
Article Number: 000162364
Article Type: Solution
Last Modified: 17 Oct 2025
Version: 4
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