RST-Raid5-config

lsblk

sdd           8:48   0   7.3T  0 disk
└─md124       9:124  0  14.6T  0 raid5
  ├─md124p2 259:8    0  14.6T  0 md
  └─md124p1 259:7    0   128M  0 md

sde           8:64   0   7.3T  0 disk
└─md124       9:124  0  14.6T  0 raid5
  ├─md124p2 259:8    0  14.6T  0 md
  └─md124p1 259:7    0   128M  0 md

sdf           8:80   0   7.3T  0 disk
└─md124       9:124  0  14.6T  0 raid5
  ├─md124p2 259:8    0  14.6T  0 md
  └─md124p1 259:7    0   128M  0 md

******************************************************************************************

mdadm --detail /dev/md124

/dev/md124:
      Container : /dev/md/ddf0, member 0
     Raid Level : raid5
     Array Size : 15626928128 (14903.00 GiB 16001.97 GB)
  Used Dev Size : 7813464064 (7451.50 GiB 8000.99 GB)
   Raid Devices : 3
  Total Devices : 3

          State : clean
 Active Devices : 3
Working Devices : 3
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

    Number   Major   Minor   RaidDevice State
       2       8       80        0      active sync   /dev/sdf
       1       8       64        1      active sync   /dev/sde
       0       8       48        2      active sync   /dev/sdd

******************************************************************************************

mdadm --examine /dev/sdd

/dev/sdd:
          Magic : de11de11
        Version : 01.00.00
Controller GUID : 44656C6C:20202020:31384530:30584200:00000022:02FFFF05
                  (Dell    18E00XB)
 Container GUID : 44656C6C:20202020:10000079:10281F16:46699B68:73151AFC
                  (Dell     06/07/17 19:09:44)
            Seq : 00000072
  Redundant hdr : yes
  Virtual Disks : 1

      VD GUID[0] : 44656C6C:20202020:10000079:10281F16:46699B68:F898D17D
                  (Dell     06/07/17 19:09:44)
         unit[0] : 0
        state[0] : Optimal, Consistent
   init state[0] : Fully Initialised
       access[0] : Read/Write
         Name[0] : DATA
 Raid Devices[0] : 3 (0 1 2)
   Chunk Size[0] : 128 sectors
   Raid Level[0] : RAID5
  Device Size[0] : 7813464064
   Array Size[0] : 15626928128

 Physical Disks : 3
      Number    RefNo      Size       Device      Type/State
         0    c88758f4  7813464064K                 active/Online
         1    5c640163  7813464064K                 active/Online
         2    c2f947af  7813464064K /dev/sdd        active/Online


******************************************************************************************

mdadm --examine /dev/sde

/dev/sde:
          Magic : de11de11
        Version : 01.00.00
Controller GUID : 44656C6C:20202020:31384530:30584200:00000022:02FFFF05
                  (Dell    18E00XB)
 Container GUID : 44656C6C:20202020:10000079:10281F16:46699B68:73151AFC
                  (Dell     06/07/17 19:09:44)
            Seq : 00000072
  Redundant hdr : yes
  Virtual Disks : 1

      VD GUID[0] : 44656C6C:20202020:10000079:10281F16:46699B68:F898D17D
                  (Dell     06/07/17 19:09:44)
         unit[0] : 0
        state[0] : Optimal, Consistent
   init state[0] : Fully Initialised
       access[0] : Read/Write
         Name[0] : DATA
 Raid Devices[0] : 3 (0 1 2)
   Chunk Size[0] : 128 sectors
   Raid Level[0] : RAID5
  Device Size[0] : 7813464064
   Array Size[0] : 15626928128

 Physical Disks : 3
      Number    RefNo      Size       Device      Type/State
         0    c88758f4  7813464064K                 active/Online
         1    5c640163  7813464064K /dev/sde        active/Online
         2    c2f947af  7813464064K                 active/Online

******************************************************************************************

mdadm --examine /dev/sdf

/dev/sdf:
          Magic : de11de11
        Version : 01.00.00
Controller GUID : 44656C6C:20202020:31384530:30584200:00000022:02FFFF05
                  (Dell    18E00XB)
 Container GUID : 44656C6C:20202020:10000079:10281F16:46699B68:73151AFC
                  (Dell     06/07/17 19:09:44)
            Seq : 00000072
  Redundant hdr : yes
  Virtual Disks : 1

      VD GUID[0] : 44656C6C:20202020:10000079:10281F16:46699B68:F898D17D
                  (Dell     06/07/17 19:09:44)
         unit[0] : 0
        state[0] : Optimal, Consistent
   init state[0] : Fully Initialised
       access[0] : Read/Write
         Name[0] : DATA
 Raid Devices[0] : 3 (0 1 2)
   Chunk Size[0] : 128 sectors
   Raid Level[0] : RAID5
  Device Size[0] : 7813464064
   Array Size[0] : 15626928128

 Physical Disks : 3
      Number    RefNo      Size       Device      Type/State
         0    c88758f4  7813464064K /dev/sdf        active/Online
         1    5c640163  7813464064K                 active/Online
         2    c2f947af  7813464064K                 active/Online

******************************************************************************************

cat /proc/mdstat

Personalities : [raid0] [raid6] [raid5] [raid4] [linear] [multipath] [raid1] [raid10]
md124 : active (auto-read-only) raid5 sdf[2] sde[1] sdd[0]
      15626928128 blocks super external:/md125/0 level 5, 64k chunk, algorithm 2 [3/3] [UUU]

******************************************************************************************

mdadm --version

mdadm - v3.3 - 3rd September 2013

******************************************************************************************

dmraid -s

/dev/sde: "isw" and "ddf1" formats discovered (using ddf1)!
/dev/sdd: "isw" and "ddf1" formats discovered (using ddf1)!
/dev/sdf: "isw" and "ddf1" formats discovered (using ddf1)!
*** Group superset .ddf1_disks
--> Subset
name   : ddf1_DATA
size   : 31253856256
stride : 128
type   : raid5_ls
status : ok
subsets: 0
devs   : 3
spares : 0
*** Group superset isw_gjcgjjeaj
--> Subset
name   : isw_gjcgjjeaj_OS
size   : 937705984
stride : 256
type   : stripe
status : ok
subsets: 0
devs   : 2
spares : 0