OK, lets see if I can understand how a disk gets flagged as bad and removed from an array. I was under the impression that any read or write operation failure flags the drive as bad and it gets removed automatically from the array. However, as I indicated in a prior post I am having problems where the array is never degraded. Does an error of type: end_request: I/O error, dev sdb, sector .... not count as a read/write error? Thanks, Alberto -- Alberto Alonso Global Gate Systems LLC. (512) 351-7233 http://www.ggsys.net Hardware, consulting, sysadmin, monitoring and remote backups - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html