hh_ssacli.txt

## SSACLI

### Show config
```bash
ssacli ctrl all show config
ssacli ctrl all show config detail
```

### Turn on led
```bash
ssacli ctrl slot=3 physicaldrive 4C:2:2 modify led=on
```

### Delete array
```bash
ssacli ctrl slot=3 array B delete
```

### create raid0
```bash
ssacli ctrl slot=0 create type=ld drives=2I:1:21,2I:1:22,2I:1:23,2I:1:24,2I:1:25 raid=0 stripsize=1024 sectors=32 forced
```

### Modo HBA
```bash
ssacli controller slot=0 modify hbamode=on
``

### More commands
https://ubuntu.com/blog/microk8s-memory-optimisation



## MDAM [Software Raid](https://www.digitalocean.com/community/tutorials/how-to-create-raid-arrays-with-mdadm-on-ubuntu-16-04)

### Create Raid
```bash
mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sda /dev/sdb
```

### Show status
```bash
cat /proc/mdstat
```

### Show detail 
```bash
mdadm --detail /dev/md0
```

### Persist Raid
```bash
sudo mdadm --detail --scan | sudo tee -a /etc/mdadm/mdadm.conf

sudo update-initramfs -u
```

### Mark the disk as failed
```bash
mdadm --manage /dev/md0 --fail /dev/sdb1
```

### Remove the disk by mdadm
```bash
mdadm --manage /dev/md0 --remove /dev/sdb1
```

###  Copy the partition table to the new disk
After replace the faulty disk with new one
```bash
sfdisk -d /dev/sda | sfdisk /dev/sdb
```

### Add the new HDD to the raid
```bash
mdadm --manage /dev/md0 --add /dev/sdb1
```


### Recreate Raid when could not be recovered without losing data
Try this in one of two raids
```bash
mdadm --create --assume-clean  --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sda missing
```


## LVM  
### Format and create LVM
```bash
root@microserver:~ # pvcreate /dev/md0
  Physical volume "/dev/md0" successfully created.

root@microserver:~ # vgcreate vg-data /dev/md0
  Volume group "vg-data" successfully created

root@microserver:~ #lvcreate -L 1000GB --name data vg-data
  Logical volume "data" created.

```