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Hello: I am trying to setup Raid 1 for my system. I generate what looks like good info during the creation process, but after rebooting, the md device is not there. I want to initially just have one hard disk - to prove it is working - then add another disk for real mirroring. Here is the output during the creation process: > mdadm --detail --scan ARRAY /dev/md8 level=raid1 num-devices=2 UUID=f5e56fdf:75f6d5ed:ce8eef25:1c2469ab devices=/dev/hdb8 > cat /proc/mdstat Personalities : [raid1] read_ahead 1024 sectors md8 : active raid1 ide/host0/bus0/target1/lun0/part8[0] 4785344 blocks [2/1] [U_] unused devices: <none> /dev/md8: Version : 00.90.00 Creation Time : Sun Apr 25 08:38:27 2004 Raid Level : raid1 Array Size : 4785344 (4.56 GiB 4.90 GB) Device Size : 4785344 (4.56 GiB 4.90 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 8 Persistence : Superblock is persistent Update Time : Sun Apr 25 08:38:28 2004 State : dirty, no-errors Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 Number Major Minor RaidDevice State 0 3 72 0 active sync /dev/hdb8 1 0 0 1 faulty UUID : f5e56fdf:75f6d5ed:ce8eef25:1c2469ab Events : 0.1 > cat /etc/mdadm.conf DEVICE /dev/hdb8 ARRAY /dev/md8 level=raid1 num-devices=2 UUID=f5e56fdf:75f6d5ed:ce8eef25:1c2469ab devices=/dev/hdb8 > cat /etc/fstab # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 /dev/hda6 none swap sw 0 0 /dev/hda5 /boot ext3 defaults 0 2 /dev/hda7 /tmp ext3 defaults 0 2 /dev/hda8 /home ext3 defaults 0 2 /dev/md8 /mnt fd defaults 0 2 /dev/hda10 / ext3 defaults,errors=remount-ro 0 1 /dev/hda9 /var ext3 defaults 0 2 # Removable media /dev/hdc /cdrom iso9660 defaults,ro,noauto,user 0 0 /dev/fd0 /floppy auto noauto,user 0 0 After rebooting: > mdadm --detail --scan > cat /proc/mdstat Personalities : read_ahead not set unused devices: <none> doug
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