On Wednesday February 6, admin@xxxxxxxxx wrote: > > > Maybe the kernel has been told to forget about the partitions of > > /dev/sdb. > > But fdisk/cfdisk has no problem whatsoever finding the partitions . It is looking at the partition table on disk. Not at the kernel's idea of partitions, which is initialised from that table... What does cat /proc/partitions say? > > > mdadm will sometimes tell it to do that, but only if you try to > > assemble arrays out of whole components. > > > If that is the problem, then > > blockdev --rereadpt /dev/sdb > > I deleted LVM devices that were sitting on top of RAID and reinstalled mdadm. > > % blockdev --rereadpt /dev/sdf > BLKRRPART: Device or resource busy > Implies that some partition is in use. > % mdadm /dev/md2 --fail /dev/sdf1 > mdadm: set /dev/sdf1 faulty in /dev/md2 > > % blockdev --rereadpt /dev/sdf > BLKRRPART: Device or resource busy > > % mdadm /dev/md2 --remove /dev/sdf1 > mdadm: hot remove failed for /dev/sdf1: Device or resource busy OK, that's weird. If sdf1 is faulty, then you should be able to remove it. What does cat /proc/mdstat dmesg | tail say at this point? NeilBrown - 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
