sda
, sdb
при необходимости можно отформатировать.# mount
/dev/md0 on / type ext4 (rw,noatime,nodiratime,data=ordered)
/dev/md127 on /data type btrfs (rw,noatime,nodiratime,nodatasum,nospace_cache,subvolid=5,subvol=/)
/dev/md0 on /run/nfs4/home type ext4 (rw,noatime,nodiratime,data=ordered)
...
# lsblk -f
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
├─sda1 linux_raid_member 2fe53b89:0 7f32aec1-c2b2-1276-5cf8-c984fa945b56
│ └─md0 ext4 2fe53b89:root ccb2bb10-faf0-4f33-9b05-79232317bfb0 /
├─sda2 linux_raid_member 2fe53b89:1 953dd93b-7743-3d27-371b-b09858f73957
│ └─md1 swap swap 6b2e6fb6-6d63-44c0-a340-73a81b78bdbd [SWAP]
└─sda3 linux_raid_member 2fe53b89:data-0 5511f0ec-9950-a668-9a4e-f5864fab40fb
└─md127 btrfs 2fe53b89:data 6fb18eb7-d6f8-49ae-a8bc-8d16c193fbcd /data
sdb
├─sdb1 linux_raid_member 2fe53b89:0 7f32aec1-c2b2-1276-5cf8-c984fa945b56
│ └─md0 ext4 2fe53b89:root ccb2bb10-faf0-4f33-9b05-79232317bfb0 /
├─sdb2 linux_raid_member 2fe53b89:1 953dd93b-7743-3d27-371b-b09858f73957
│ └─md1 swap swap 6b2e6fb6-6d63-44c0-a340-73a81b78bdbd [SWAP]
└─sdb3 linux_raid_member 2fe53b89:data-0 5511f0ec-9950-a668-9a4e-f5864fab40fb
└─md127 btrfs 2fe53b89:data 6fb18eb7-d6f8-49ae-a8bc-8d16c193fbcd /data
root@nas:~# blkid
/dev/md/data-0: LABEL="2fe53b89:data" UUID="6fb18eb7-d6f8-49ae-a8bc-8d16c193fbcd" UUID_SUB="d1c3b76c-683d-4086-b9b3-2df2d15fcbc7" TYPE="btrfs"
/dev/md0: LABEL="2fe53b89:root" UUID="ccb2bb10-faf0-4f33-9b05-79232317bfb0" TYPE="ext4"
/dev/md1: LABEL="swap" UUID="6b2e6fb6-6d63-44c0-a340-73a81b78bdbd" TYPE="swap"
/dev/sda1: UUID="7f32aec1-c2b2-1276-5cf8-c984fa945b56" UUID_SUB="effb7efd-62d6-7031-9ac7-1d7bc7c846b6" LABEL="2fe53b89:0" TYPE="linux_raid_member" PARTUUID="11ab9914-6c03-427e-b679-e14150f4c305"
/dev/sda2: UUID="953dd93b-7743-3d27-371b-b09858f73957" UUID_SUB="1d830e0a-eada-1288-5866-e324df77e173" LABEL="2fe53b89:1" TYPE="linux_raid_member" PARTUUID="d76ed9f3-64e6-4bed-9dfe-607199afd703"
/dev/sda3: UUID="5511f0ec-9950-a668-9a4e-f5864fab40fb" UUID_SUB="57bab088-6143-fa3f-3297-727c730c4388" LABEL="2fe53b89:data-0" TYPE="linux_raid_member" PARTUUID="e701e06c-999f-4f05-983e-9dc487f18fc8"
/dev/sdb1: UUID="7f32aec1-c2b2-1276-5cf8-c984fa945b56" UUID_SUB="0c863e5f-2aea-736c-31d9-5d3384c9457c" LABEL="2fe53b89:0" TYPE="linux_raid_member" PARTUUID="ae491ae6-3f16-4139-97be-6cf3cf42eca3"
/dev/sdb2: UUID="953dd93b-7743-3d27-371b-b09858f73957" UUID_SUB="c1b76bc0-6538-d2be-a6f4-0a17df7b6323" LABEL="2fe53b89:1" TYPE="linux_raid_member" PARTUUID="ddfa97de-6c5c-42c2-ac8a-b4271ae106a8"
/dev/sdb3: UUID="5511f0ec-9950-a668-9a4e-f5864fab40fb" UUID_SUB="01978edd-b383-2b45-7e42-5d34f779e5f3" LABEL="2fe53b89:data-0" TYPE="linux_raid_member" PARTUUID="5e7fe2d5-fd9d-4242-ab04-1dc8528f76d2"
/dev/md127: LABEL="2fe53b89:data" UUID="6fb18eb7-d6f8-49ae-a8bc-8d16c193fbcd" UUID_SUB="d1c3b76c-683d-4086-b9b3-2df2d15fcbc7" TYPE="btrfs"
/dev/ubi0_0: UUID="54c651e0-a819-4cc7-9b81-8b977fbb046d" TYPE="ubifs"
У меня ReadyNas 102 с прошивкой v6.10.2