Alan Mackenzie: ... > The cause was me booting up the machine with a rescue disk. This > assembled my RAID partitions /dev/md127 and /dev/md126 reversed, but > also wrote those wrong identifiers, 126 and 127, into the "preferred > minor" field of the partitions' super blocks. In essence, they got > swapped. ... > Just for the record, all my RAID arrays have metadata version 0.90, the > (old fashioned) one that allows auto-assembly by the kernel without the > need of an initramfs. > > The moral of the story: if your system uses software RAID, be careful > indeed before you boot up with a rescue disk.
So, why don't you simple add "root=902 md=2,/dev/sda2,/dev/sdb2" or similar to your boot loader kernel command line ? /// And... what is the need for dynamic minors now when dev_t is 32bits: $ grep dev_t /Net/git/linux-stable/include/linux/types.h typedef u32 __kernel_dev_t; typedef __kernel_dev_t dev_t; $ and we have 20 bits minors: $ grep -A1 MINORBITS /Net/git/linux-stable/include/linux/kdev_t.h #define MINORBITS 20 #define MINORMASK ((1U << MINORBITS) - 1) #define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS)) #define MINOR(dev) ((unsigned int) ((dev) & MINORMASK)) #define MKDEV(ma,mi) (((ma) << MINORBITS) | (mi)) Regards, /Karl Hammar
