PRIMECLUSTER Global File Services Configuration and Administration Guide 4.2 (Solaris(TM) Operating Environment)

2.8 Area Reallocation in case of Disk Block Failure

If a disk block hardware error occurs in a newly allocated meta-data area in the GFS Local File System, another disk block is allocated automatically.

This function makes it possible to continue file system processing provided that an error occurs only in a specific block on the disk.

This function ensures that the block that contains the I/O error is temporarily skipped. Therefore, if a request for using this faulty block occurs, a new I/O error may occur. Since such an I/O error prolongs the time to respond to the corresponding request, it is important to remove the cause for the error as soon as possible. If block reallocation occurs due to an I/O error, recover the file system by backing up the file system, removing the cause for the hardware error, such as by replacing the disk, and restore the data that had been backed up.