1. audit
lsscsi -s
[0:0:0:0] disk ATA MTFDDAK240MBB-1A MB33 /dev/sda 240GB
[1:0:0:0] cd/dvd HL-DT-ST RW/DVD MU10N 1.05 /dev/sr0 -
[5:0:0:0] disk JMicron 0000 /dev/sdb 4.00TB
fdisk -l /dev/sdb
Disk /dev/sdb: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 7B86B6FF-30BD-46EE-AD2B-2B531135A3F1
Device Start End Sectors Size Type
/dev/sdb1 2048 4982527 4980480 2.4G Linux RAID
/dev/sdb2 4982528 9176831 4194304 2G Linux RAID
/dev/sdb5 9453280 7813830239 7804376960 3.6T Linux RAID
mdadm -E /dev/sdb5
/dev/sdb5:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : ea184280:8651a5e3:3b29dee4:c957cc20
Name : DiskStation:2
Creation Time : Tue Feb 21 15:55:57 2017
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 7804374912 (3721.42 GiB 3995.84 GB)
Array Size : 3902187456 (3721.42 GiB 3995.84 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
Unused Space : before=1968 sectors, after=0 sectors
State : clean
Device UUID : f438ba9a:de56a419:8b37175f:571da70e
Update Time : Tue Feb 21 16:45:43 2017
Checksum : a212c9d2 - correct
Events : 2
Device Role : Active device 0
Array State : AA ('A' == active, '.' == missing, 'R' == replacing)
mdadm --detail --scan
INACTIVE-ARRAY /dev/md127 metadata=1.2 name=DiskStation:2 UUID=ea184280:8651a5e3:3b29dee4:c957cc20
cat /proc/mdstat
Personalities :
md127 : inactive sdb5[0](S)
3902187456 blocks super 1.2
unused devices: <none>
2. mount
mdadm --stop /dev/md127
mdadm: stopped /dev/md127
vgchange -a n vg1000
mdadm --assemble --scan
mdadm: /dev/md/DiskStation:2 has been started with 1 drive (out of 2).
vgscan
Reading volume groups from cache.
Found volume group "vg1000" using metadata type lvm2
Found volume group "v01" using metadata type lvm2
mount /dev/mapper/vg1000-lv /mnt/everest/