(yes this is different from my problem I had a couple of days ago). Does 3ware (or any other controller for that matter) let you remove a disk without telling the controller/driver/OS first? 3ware provides a utilty to notify the driver that you are about to remove the disk, but I want to be able to just remove the disk on a whim. I ran a test using two disks on two separate 3ware controllers. I ran two programs -- one would read sequentially from one disk, while the other would read sequentially from the other disk (which is on the other controller). When I forcibly remove the disk, the program reading from that disk hangs (understandably). However, about 10-20 seconds later, the kernel issues a reset (calling the eh_host_reset_handler), and effectively locks up ALL disk access, even the reads to the separate controller! Obviously this is a problem for a system that is supposed to be resilient to failures. I have a feeling that if a drive failed on me, I would see the same problem -- SCSI drive errors, followed by a reset. It seems that there must be some better way to handle that. Scott - 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
