Neil Brown wrote: > This problem is very hard to solve inside the kernel. > The partitions will not be visible until the array is opened *after* > it has been created. Making the partitions visible before that would > be possible, but would be very easy. > > I think the best solution is Mike's solution which is to simply > open/close the array after it has been assembled. I will make sure > this is in the next release of mdadm. > > Note that you can still access the partitions even though they do not > appear in /proc/partitions. Any attempt to access and of them will > make them all appear in /proc/partitions. But I understand there is > sometimes value in seeing them before accessing them. > > NeilBrown Um. Are you sure? The reason I noticed is that I couldn't mount them until they appeared; see these cut'n'pastes from my terminal history: teak:~# mount /media/ mount: /dev/md_d0p1 is not a valid block device teak:~# mount /dev/md_d0p1 /media mount: you must specify the filesystem type teak:~# xfs_repair -ln /dev/md_d0p2 /dev/md_d0p1 Usage: xfs_repair [-nLvV] [-o subopt[=value]] [-l logdev] [-r rtdev] devname teak:~# ll /dev/md* brw-rw---- 1 root disk 254, 0 2007-04-23 15:44 /dev/md_d0 brw-rw---- 1 root disk 254, 1 2007-04-23 14:46 /dev/md_d0p1 brw-rw---- 1 root disk 254, 2 2007-04-23 14:46 /dev/md_d0p2 brw-rw---- 1 root disk 254, 3 2007-04-23 15:44 /dev/md_d0p3 brw-rw---- 1 root disk 254, 4 2007-04-23 15:44 /dev/md_d0p4 /dev/md: total 0 teak:~# /etc/init.d/mdadm-raid stop Stopping MD array md_d0...done (stopped). teak:~# /etc/init.d/mdadm-raid start Assembling MD array md_d0...done (degraded [4/5]). Generating udev events for MD arrays...done. teak:~# cfdisk /dev/md_d0 teak:~# mount /dev/md_d0p1 mount: /dev/md_d0p1 is not a valid block device and so on... Notice the cfdisk command above. I did this to check the on-array table (it was good). I assume cfdisk opens the array - but the partitions were still not there afterwards. I did not do a 'Write' from in cfdisk this time. I wouldn't be so concerned at a cosmetic thing in /proc/partitions - the problem is that I can't mount my array after doing an assemble and I have to --create each time - not the nicest solution. Oh, I'm using udev FWIW. David - 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
