Thanks I think I am going to need it 

Thanks I will purchase a new Seagate 1.5TB HDD and see what it does and let you know............its going to take a couple of days to organise a new HDD

Thanks again for your patience and assistance with this issue........just confirming I should first try su mdadm -D /dev/md1 then if that does nothing then use the two cmd's that you suggested 

Just so I fully understand could I clarify a couple of your suggestions as you point out I rather not lose all the data.

As the original RAID was set up with 4 x HDD's and the 5th one Linuxmce automatically marked as spare can I buy another 1.5TB HDD and replace the failed one in the raid and hopefully it will rebuild as from my understanding that you are saying if I replace the HDD I can't just have 4 hDD's I need it to have the spare as well and if that is correct once I replace the faulty HDD then it will it rebuild or will I have to use one of your commands that you sent.

I have a backup of some of the data though as its a RAID array I assume I can't take out each HDD and put it in my QNAP and copy it

Really appreciate all your help and sorry for the dumb questions I just need to recover the family photos or life won't be worth living I certainly have learned a lesson here about backing data up

Regards
Beeker

Done Thom..........excuse any mistakes as its the first ticket I have ever created so I hope its correct 

Please let me know if I need to make any changes

Beeker

Will do happy to provide any information or help

I got home and checked all the HDD's and found with one making a slow beeping noise which I can only assume is sdd1 so a couple of questions

Should I leave it plugged in and try to rebuild the RAID with the commands you gave me and hopefully the spare drive will now form part of the RAID though I think the spare drive is just that a "spare drive" and not a hot spare so the other choice would be to unplug sdd1 and plug that into sdf and then reassemble the RAID with your commands and hopefully the data will come back

I really appreciate all you help with trying to help me fix this thanks very much

Best regards
Beeker

No I have 4 x HDD's with one hot spare so it should be b,c,d & e with f as a hot spare so may be either the power or the sata lead may have come out, I will check these when I get home and let you know

This is what I got

dcerouter_1024641:/home/bruce# mdadm -E /dev/sdd1
mdadm: cannot open /dev/sdd1: No such file or directory

ok

Here you go
cat /proc/mdstat   

dcerouter_1024641:/home/bruce# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md1 : inactive sdb1[0](S) sdf[4](S) sde1[3](S) sdc1[1](S)
      5860546304 blocks

mdadm -E /dev/sdb1
dcerouter_1024641:/home/bruce# mdadm -E /dev/sdb1
/dev/sdb1:
          Magic : a92b4efc
        Version : 00.90.00
           UUID : 5747d0ac:31c15bff:bd9f1658:0a1d2015 (local to host dcerouter)
  Creation Time : Sun Dec 27 10:14:43 2009
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 5
Preferred Minor : 1

    Update Time : Thu Jun 13 09:02:55 2013
          State : clean
 Active Devices : 4
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 1
       Checksum : ee358c49 - correct
         Events : 1802

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     0       8       17        0      active sync   /dev/sdb1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       33        1      active sync   /dev/sdc1
   2     2       8       49        2      active sync
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       80        4      spare   /dev/sdf



mdadm -E /dev/sdc1
dcerouter_1024641:/home/bruce# mdadm -E /dev/sdc1
/dev/sdc1:
          Magic : a92b4efc
        Version : 00.90.00
           UUID : 5747d0ac:31c15bff:bd9f1658:0a1d2015 (local to host dcerouter)
  Creation Time : Sun Dec 27 10:14:43 2009
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 5
Preferred Minor : 1

    Update Time : Thu Jun 13 09:02:55 2013
          State : clean
 Active Devices : 4
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 1
       Checksum : ee358c5b - correct
         Events : 1802

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     1       8       33        1      active sync   /dev/sdc1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       33        1      active sync   /dev/sdc1
   2     2       8       49        2      active sync
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       80        4      spare   /dev/sdf


mdadm -E /dev/sde1
dcerouter_1024641:/home/bruce# mdadm -E /dev/sde1
/dev/sde1:
          Magic : a92b4efc
        Version : 00.90.00
           UUID : 5747d0ac:31c15bff:bd9f1658:0a1d2015 (local to host dcerouter)
  Creation Time : Sun Dec 27 10:14:43 2009
     Raid Level : raid5
  Used Dev Size : 1465135936 (1397.26 GiB 1500.30 GB)
     Array Size : 4395407808 (4191.79 GiB 4500.90 GB)
   Raid Devices : 4
  Total Devices : 5
Preferred Minor : 1

    Update Time : Thu Jun 13 09:02:55 2013
          State : clean
 Active Devices : 4
Working Devices : 5
 Failed Devices : 0
  Spare Devices : 1
       Checksum : ee358c7f - correct
         Events : 1802

         Layout : left-symmetric
     Chunk Size : 64K

      Number   Major   Minor   RaidDevice State
this     3       8       65        3      active sync   /dev/sde1

   0     0       8       17        0      active sync   /dev/sdb1
   1     1       8       33        1      active sync   /dev/sdc1
   2     2       8       49        2      active sync
   3     3       8       65        3      active sync   /dev/sde1
   4     4       8       80        4      spare   /dev/sdf

I tried
mdadm –detail /dev/md1 and got

dcerouter_1024641:/home/bruce# mdadm -detail /dev/md1
mdadm: -d does not set the mode, and so cannot be the first option.

So than I tried mdadm -D /dev/md1 and got
dcerouter_1024641:/home/bruce# mdadm -D /dev/md1
mdadm: md device /dev/md1 does not appear to be active.

Hi Crumble

This is what I got from sudo fdisk -l and from memory sdf was always the spare drive

dcerouter_1024641:/home/bruce# sudo fdisk -l

Disk /dev/sda: 750.1 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x39686ed2

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       90446   726507463+  83  Linux
/dev/sda2           90447       91201     6064537+   5  Extended
/dev/sda5           90447       91201     6064506   82  Linux swap / Solaris

Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0006a5c8

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      182401  1465136001   83  Linux

Disk /dev/sdc: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xb217d64b

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      182401  1465136001   83  Linux

Disk /dev/sde: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x43b7a284

   Device Boot      Start         End      Blocks   Id  System
/dev/sde1               1      182401  1465136001   83  Linux

Disk /dev/sdf: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xc8efaf55

Disk /dev/sdf doesn't contain a valid partition table


I also tried

dcerouter_1024641:/home/bruce# mdadm -E /dev/md1
mdadm: No md superblock detected on /dev/md1.

Any help on how to proceed would be greatly appreciated I wasn't sure where to go from here

Regards
Beeker

Thanks very much for the info I will try it now and report back and sorry its a software RAID5 in LMCE

Kind regards
Beeker

Hi All,
We had a power failure at home and my system with 810 and when the power came back and it booted back up now the LMCE software RAID is showing all the drives as removed I have tried su mdadm -D /dev/md1 and it comes back with mdadm: md device /dev/md1 does not appear to be active.

I have very limited cmd line knowledge so any help would be appreciated to see if there is anything I can try to recover the RAID and data as all our family photos are on it and I am currently building up a new QNAP NAS with RAID6 as I was advised to do

I have attached a photo from LMCE of the RAID

Kind regards
Beeker

Apologies to all that replied I am traveling at the moment so I will respond to all the posts this weekend, though I did manage to get the Qnap to be recognised by 810 after finding a previous post of how to get it to rescan