Something is happening here. I don't know what, but I'm having fun trying to guess. The root file system (ext3) is on a 4 x 30 GB RAID-1 array. A couple hours after boot, the kernel detected something wrong in the file system and decided to remount it read-only. Comparing the component partitions finds many differences with a very uneven distribution : - sda1 and sdb1 are identical except for 4 bytes in the last 70 kB, - sdd1 is identical to sda1 and sdb1 except for about 67,000 differences in the last 70 kB. - sdc1 is grossly out of sync with about 300 million differences with the others, all of them in the first 450 MB or so. I'm not sure what to make of this. The knee-jerk thought would be "/dev/sdc1 is the odd man out so sdc must be faulty". But that disk participates in other arrays without problems, I don't see anything obviously bad in its SMART data and the kernel messages just before the remount were actually about sda. To be honest, I don't have a clear idea of how things got where they are. Since writing to a RAID-1 array writes the same data to all devices, how can you have so many differences ? -- 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
