I decided to reuse two ext4
HDDs from my Qnap server in my Omnia RAID.
As such, I simply mounted the UUID, rather than use mdadm
to create the /dev/md0
device as suggested in this thread:
When I add content (a large file, for example) to the drive, the capacity of /dev/sda3
and /dev/sdb3
appear to change correspondingly.
The questions:
- have I actually created a RAID 1 device?
- should I be using
mdadm
?
Supporting information:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 1.8T 0 disk
|-sda1 8:1 0 517.7M 0 part /tmp/run/mountd/sda1
|-sda2 8:2 0 517.7M 0 part
|-sda3 8:3 0 1.8T 0 part /tmp/run/mountd/sda3
`-sda4 8:4 0 486.3M 0 part /tmp/run/mountd/sda4
sdb 8:16 0 1.8T 0 disk
|-sdb1 8:17 0 517.7M 0 part /tmp/run/mountd/sdb1
|-sdb2 8:18 0 517.7M 0 part
|-sdb3 8:19 0 1.8T 0 part /tmp/run/mountd/sdb3
`-sdb4 8:20 0 486.3M 0 part /tmp/run/mountd/sdb4
mtdblock0 31:0 0 1M 0 disk
mtdblock1 31:1 0 7M 0 disk
mmcblk0 179:0 0 7.3G 0 disk
`-mmcblk0p1 179:1 0 7.3G 0 part /
mmcblk0boot0 179:8 0 4M 1 disk
mmcblk0boot1 179:16 0 4M 1 disk
mmcblk0rpmb 179:24 0 4M 0 disk
and
# df -h
Filesystem Size Used Available Use% Mounted on
/dev/mmcblk0p1 7.3G 1.6G 5.7G 22% /
tmpfs 503.6M 15.5M 488.1M 3% /tmp
tmpfs 512.0K 4.0K 508.0K 1% /dev
/dev/sda3 1.8T 529.0G 1.3T 29% /mnt/raid
/dev/sdb3 1.8T 529.0G 1.3T 29% /mnt/raid
/dev/sdb4 355.0M 351.7M 3.3M 99% /tmp/run/mountd/sdb4
/dev/sdb3 1.8T 529.0G 1.3T 29% /tmp/run/mountd/sdb3
/dev/sdb1 493.5M 111.1M 382.4M 23% /tmp/run/mountd/sdb1
/dev/sda4 355.0M 351.7M 3.3M 99% /tmp/run/mountd/sda4
/dev/sda3 1.8T 927.4G 904.2G 51% /tmp/run/mountd/sda3
/dev/sda1 493.5M 111.1M 382.4M 23% /tmp/run/mountd/sda1