# Penguin2 RAID 5

# Tags

* assigned: @fredm, @pjotrp
* status: in progress

# Description

The current RAID contains 3 disks:

```
root@penguin2:~# cat /proc/mdstat
md0 : active raid5 sdb1[1] sda1[0] sdg1[4]
/dev/md0         33T   27T  4.2T  87% /export
```

using /dev/sda,sdb,sdg

The current root and swap is on

```
# root
/dev/sdd1       393G  121G  252G  33% /
# swap
/dev/sdd5 partition 976M 76.5M   -2
```

We can therefore add four new disks in slots /dev/sdc,sde,sdf,sdh

penguin2 has no out-of-band and no serial connector right now. That means any work needs to be done on the terminal.

Boot loader menu:

```
menuentry 'Debian GNU/Linux' --class debian --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-7ff268df-cb90-4cbc-9d76-7fd6677b4964' {
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_msdos
        insmod ext2
        set root='hd2,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos1 --hint-efi=hd2,msdos1 --hint-baremetal=ahci2,msdos1  7ff268df-cb90-4cbc-9d76-7fd6677b4964
        else
          search --no-floppy --fs-uuid --set=root 7ff268df-cb90-4cbc-9d76-7fd6677b4964
        fi
        echo    'Loading Linux 5.10.0-18-amd64 ...'
        linux   /boot/vmlinuz-5.10.0-18-amd64 root=UUID=7ff268df-cb90-4cbc-9d76-7fd6677b4964 ro  quiet
        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-5.10.0-18-amd64
}
```

Added to sdd MBR

```
root@penguin2:~# grub-install /dev/sdd
Installing for i386-pc platform.
Installation finished. No error reported.
```