On Tue, 11 May 2010 12:07:08 +0530 Light King <thelightking@xxxxxxxxx> wrote: > hello , > > i m using mdadm - v2.6.7.1 . when I m creating a raid array of 4 disk > using command > > mdadm --create --chunk=64 --level=0 --raid-devices=4 /dev/md99 > /dev/sda /dev/sdb /dev/sdc /dev/sdd > > > in dev directory of my PC I m getting md99 device and along with this > md_d99 . So I m not able understand what is this md_d99 ? this thing > was not happening previously in previous versions of mdadm . > Does this extra "md_d99" appear when you create the array, or only when you assemble it, or only after reboot? What does ls -l /dev/md* show? > > another issue if i reboot the PC also it shd keep active the md99 > array , but it is not happening . in cat /proc/mdstat only I can found > md_d99 . This sounds like the array is being assembled by udev issuing mdadm -I devname commands, the somehow "mdadm -I" is getting confused about whether to create a partitioned array or not (/dev/md99 cannot have partitions, /dev/md_d99 can). Maybe try: mdadm -Ss mdadm -Ivv /dev/sda mdadm -Ivv /dev/sdb mdadm -Ivv /dev/sdc mdadm -Ivv /dev/sdd cat /proc/mdstat then report the output of all of that. All the config files you listed look OK. NeilBrown > > I created a array with the following command > mdadm --create --chunk=64 --level=0 --raid-devices=4 /dev/md99 > /dev/sda /dev/sdb /dev/sdc /dev/sdd > > before reboot the system in cat /proc/mdstat I used to get md99 but > after reboot following things are coming ~~~~~~~~ > > > cat /proc/mdstat > Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] > [raid4] [raid10] > md_d99 : inactive sdb[0](S) > 15646592 blocks > > unused devices: <none> > > > > cat /proc/cmdline > BOOT_IMAGE=/boot/vmlinuz-2.6.31.9-scst > root=UUID=778e7d82-4733-4de5-977b-268cdba8bdda ro > > > > root@dmachine:~# cat /etc/mdadm/mdadm.conf > # mdadm.conf > # > # Please refer to mdadm.conf(5) for information about this file. > # > > # by default, scan all partitions (/proc/partitions) for MD superblocks. > # alternatively, specify devices to scan, using wildcards if desired. > DEVICE partitions > > # auto-create devices with Debian standard permissions > CREATE owner=root group=disk mode=0660 auto=yes > > # automatically tag new arrays as belonging to the local system > HOMEHOST <system> > > # instruct the monitoring daemon where to send mail alerts > MAILADDR root > > # definitions of existing MD arrays > > # This file was auto-generated on Wed, 03 Feb 2010 10:47:50 -0500 > # by mkconf $Id$ > ARRAY /dev/md0 level=raid1 num-devices=2 > UUID=602a804e:91caebca:9492a6f6:c7fe0f79 > ARRAY /dev/md1 level=raid1 num-devices=2 > UUID=09d42156:0a8b8429:9492a6f6:c7fe0f79 > > > regds > > Anshuman > > > > > > > > the light king > -- > 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 -- 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
