turned on my nas this morning and all of a sudden
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root@NAS:~# dmesg | grep md
[ 0.000000] Linux version 3.14-0.bpo.1-amd64 (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.14.12-1~bpo70+1 (2014-07 -13)
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.14-0.bpo.1-amd64 root=UU ID=eda89dca-cfef-4bc5-a870-c669768937a5 ro quiet
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.14-0.bpo.1-amd64 root=UUID=eda89dca-cfef-4bc5-a870-c669768937a5 ro quiet
[ 1.366694] AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>
[ 1.489103] usb usb1: Manufacturer: Linux 3.14-0.bpo.1-amd64 ehci_hcd
[ 1.500934] usb usb2: Manufacturer: Linux 3.14-0.bpo.1-amd64 ehci_hcd
[ 1.512993] usb usb3: Manufacturer: Linux 3.14-0.bpo.1-amd64 ehci_hcd
[ 1.575588] usb usb5: Manufacturer: Linux 3.14-0.bpo.1-amd64 xhci_hcd
[ 1.577434] usb usb4: Manufacturer: Linux 3.14-0.bpo.1-amd64 ohci_hcd
[ 1.579942] usb usb6: Manufacturer: Linux 3.14-0.bpo.1-amd64 xhci_hcd
[ 1.590473] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf100 irq 14
[ 1.590478] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf108 irq 15
[ 1.664893] usb usb7: Manufacturer: Linux 3.14-0.bpo.1-amd64 ohci_hcd
[ 1.724843] usb usb8: Manufacturer: Linux 3.14-0.bpo.1-amd64 ohci_hcd
[ 1.784850] usb usb9: Manufacturer: Linux 3.14-0.bpo.1-amd64 ohci_hcd
[ 2.767211] platform microcode: firmware: direct-loading firmware amd-ucode/m icrocode_amd.bin
[ 2.787194] md: md127 stopped.
[ 2.791266] md: bind<sdb>
[ 2.791563] md: bind<sdf>
[ 2.791784] md: bind<sdd>
[ 2.791984] md: bind<sde>
[ 2.792143] md: bind<sdc>
[ 2.792178] md: kicking non-fresh sde from array!
[ 2.792186] md: unbind<sde>
[ 2.808872] md: export_rdev(sde)
[ 2.808896] md: kicking non-fresh sdf from array!
[ 2.808910] md: unbind<sdf>
[ 2.816592] md: export_rdev(sdf)
[ 3.108636] md: raid6 personality registered for level 6
[ 3.108644] md: raid5 personality registered for level 5
[ 3.108647] md: raid4 personality registered for level 4
[ 3.109192] md/raid:md127: device sdc operational as raid disk 0
[ 3.109199] md/raid:md127: device sdd operational as raid disk 3
[ 3.109202] md/raid:md127: device sdb operational as raid disk 1
[ 3.110010] md/raid:md127: allocated 0kB
[ 3.110098] md/raid:md127: not enough operational devices (2/5 failed)
[ 3.110817] md/raid:md127: failed to run raid set.
[ 3.110864] md: pers->run() failed ...
[ 5.058407] md: md126 stopped.
[ 5.071936] md: bind<sde>
[ 5.072825] md: bind<sdf>hope it is fixable
found this online:
http://www.linuxquestions.org/…array-416853/#post2111729
but i get this:
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root@NAS:~# mdadm /dev/md127 --add /dev/sde
mdadm: Cannot open /dev/sde: Device or resource busy