PRIMECLUSTER Global File Services Configuration and Administration Guide 4.1 (Linux)

C.2.1 Action for I/O errors

If message "sfcfs...:read error" or "sfcfs...:write error" is output

The "sfcfs...:read error" message indicates that an I/O error occurred while file system data was being read from a disk. The "sfcfs...:write error" message indicates that an I/O error occurred while file system data was being written to a disk.

If the messages are displayed, recovery processing is required because an I/O path or device is faulty.

Perform the recovery processing using the following procedures:

1. Locate the file system and partition in which the error occurred.

Pinpoint it with sfcinfo (8), a GFS Shared File System management command, using the device number in the error message as a key.

# sfcinfo -d device-number

2. If an sfcfs...:write error occurs

This error indicates that file system information updated in memory cannot be reflected on the disk. If this happens, files in the file system should be backed up before unmounting to prevent the updated information from being lost by unmounting.

3. Unmount the file system service in which the error occurred.

Unmount the file system service.

4. Correct the file system in which the error occurred.

Make a copy of the file system data on the partition where the error occurred, change the partition, then use sfcfsck(8) to restore the consistency of the file system. sfcfsck(8) must be executed with the setting to perform a full check.

# sfcfsck -o nolog special-device-name

5. If the file system in which the error occurred cannot be corrected

When step 4 cannot repair the file system, swap the faulty part, re-create the file system, and restore the backed up data.