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

1.3.3 Area reassignment in case of disk block failure

The GFS Shared File System automatically assigns another disk block to a new meta-data area if a disk block hardware failure occurs.

Assignment allows continuous file system processing if a disk failure occurs only on a specific block.

This function only suppresses use of a block where an I/O error has occurred. If a request to use the same block is issued, however, an I/O error may occur again. In the case of an I/O error, the error must be corrected because the response time for that request increases. If block reassignment by such an I/O error occurs, back up the file system first. Then correct the hardware failure by replacing the failed disk with a new one, and restore the backed-up data to recover the file system.