Hi All, I have a box that I believe was not powered down correctly and after transporting it to a different location it doesn't boot anymore stopping at BIOS check "Verifying DMI Pool Data". The box have 6 drives and after instructing the BIOS to boot from the first drive I managed to boot the OS (Fedora 23) after commenting out 2 /etc/fstab entries , output for "uname -a; cat /etc/fstab" follows: [root@lamachine ~]# uname -a; cat /etc/fstab Linux lamachine 4.3.3-303.fc23.x86_64 #1 SMP Tue Jan 19 18:31:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux # # /etc/fstab # Created by anaconda on Tue Mar 24 19:31:21 2015 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/vg_bigblackbox-LogVol_root / ext4 defaults 1 1 UUID=4e51f903-37ca-4479-9197-fac7b2280557 /boot ext4 defaults 1 2 /dev/mapper/vg_bigblackbox-LogVol_opt /opt ext4 defaults 1 2 /dev/mapper/vg_bigblackbox-LogVol_tmp /tmp ext4 defaults 1 2 /dev/mapper/vg_bigblackbox-LogVol_var /var ext4 defaults 1 2 UUID=9194f492-881a-4fc3-ac09-ca4e1cc2985a swap swap defaults 0 0 /dev/md2 /home ext4 defaults 1 2 #/dev/vg_media/lv_media /mnt/media ext4 defaults 1 2 #/dev/vg_virt_dir/lv_virt_dir1 /mnt/guest_images/ ext4 defaults 1 2 [root@lamachine ~]# When checking mdstat I can see that 2 of the arrays are showing up as inactive, but not sure how to safely activate these so looking for some knowledgeable advice on how to proceed here. Thanks in advance, Daniel Below some more relevant outputs: [root@lamachine ~]# cat /proc/mdstat Personalities : [raid10] [raid6] [raid5] [raid4] [raid0] md127 : active raid0 sda5[0] sdc5[2] sdb5[1] 94367232 blocks super 1.2 512k chunks md2 : active raid5 sda3[0] sdc2[2] sdb2[1] 511999872 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU] md128 : inactive sdf1[3](S) 2147352576 blocks super 1.2 md129 : inactive sdf2[2](S) 524156928 blocks super 1.2 md126 : active raid10 sda2[0] sdc1[1] 30719936 blocks 2 near-copies [2/2] [UU] unused devices: <none> [root@lamachine ~]# cat /etc/mdadm.conf # mdadm.conf written out by anaconda MAILADDR root AUTO +imsm +1.x -all ARRAY /dev/md2 level=raid5 num-devices=3 UUID=2cff15d1:e411447b:fd5d4721:03e44022 ARRAY /dev/md126 level=raid10 num-devices=2 UUID=9af006ca:8845bbd3:bfe78010:bc810f04 ARRAY /dev/md127 level=raid0 num-devices=3 UUID=acd5374f:72628c93:6a906c4b:5f675ce5 ARRAY /dev/md128 metadata=1.2 spares=1 name=lamachine:128 UUID=f2372cb9:d3816fd6:ce86d826:882ec82e ARRAY /dev/md129 metadata=1.2 name=lamachine:129 UUID=895dae98:d1a496de:4f590b8b:cb8ac12a [root@lamachine ~]# mdadm --detail /dev/md1* /dev/md126: Version : 0.90 Creation Time : Thu Dec 3 22:12:12 2009 Raid Level : raid10 Array Size : 30719936 (29.30 GiB 31.46 GB) Used Dev Size : 30719936 (29.30 GiB 31.46 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 126 Persistence : Superblock is persistent Update Time : Tue Aug 2 07:46:39 2016 State : clean Active Devices : 2 Working Devices : 2 Failed Devices : 0 Spare Devices : 0 Layout : near=2 Chunk Size : 64K UUID : 9af006ca:8845bbd3:bfe78010:bc810f04 Events : 0.264152 Number Major Minor RaidDevice State 0 8 2 0 active sync set-A /dev/sda2 1 8 33 1 active sync set-B /dev/sdc1 /dev/md127: Version : 1.2 Creation Time : Tue Jul 26 19:00:28 2011 Raid Level : raid0 Array Size : 94367232 (90.00 GiB 96.63 GB) Raid Devices : 3 Total Devices : 3 Persistence : Superblock is persistent Update Time : Tue Jul 26 19:00:28 2011 State : clean Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Chunk Size : 512K Name : reading.homeunix.com:3 UUID : acd5374f:72628c93:6a906c4b:5f675ce5 Events : 0 Number Major Minor RaidDevice State 0 8 5 0 active sync /dev/sda5 1 8 21 1 active sync /dev/sdb5 2 8 37 2 active sync /dev/sdc5 /dev/md128: Version : 1.2 Raid Level : raid0 Total Devices : 1 Persistence : Superblock is persistent State : inactive Name : lamachine:128 (local to host lamachine) UUID : f2372cb9:d3816fd6:ce86d826:882ec82e Events : 4154 Number Major Minor RaidDevice - 8 81 - /dev/sdf1 /dev/md129: Version : 1.2 Raid Level : raid0 Total Devices : 1 Persistence : Superblock is persistent State : inactive Name : lamachine:129 (local to host lamachine) UUID : 895dae98:d1a496de:4f590b8b:cb8ac12a Events : 0 Number Major Minor RaidDevice - 8 82 - /dev/sdf2 [root@lamachine ~]# mdadm --detail /dev/md2 /dev/md2: Version : 0.90 Creation Time : Mon Feb 11 07:54:36 2013 Raid Level : raid5 Array Size : 511999872 (488.28 GiB 524.29 GB) Used Dev Size : 255999936 (244.14 GiB 262.14 GB) Raid Devices : 3 Total Devices : 3 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Mon Aug 1 20:24:23 2016 State : clean Active Devices : 3 Working Devices : 3 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 64K UUID : 2cff15d1:e411447b:fd5d4721:03e44022 (local to host lamachine) Events : 0.611 Number Major Minor RaidDevice State 0 8 3 0 active sync /dev/sda3 1 8 18 1 active sync /dev/sdb2 2 8 34 2 active sync /dev/sdc2 [root@lamachine ~]# -- 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