Stock quad disk layout
From NAS-Central Buffalo - The Linkstation Wiki
Quad Disk Layout
By default the LSQuad comes with 4 disks with each partition as part of a raid array.
$ fdisk -l /dev/sda Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 125 1004031 83 Linux /dev/sda2 126 748 5004247+ 83 Linux /dev/sda4 749 121601 970751722+ 5 Extended /dev/sda5 749 873 1004031 82 Linux swap / Solaris /dev/sda6 874 121478 968759631 83 Linux
Note that the above table is for a 1TB disk. All disks use the same size for all partitions other than /dev/sda6, which simply fills any remaining space.
Boot drive. It is mirrored across all drives. The stock firmware will automatically synchronise all sXa1 partitions across all disks when it starts. Note that UBoot is not raid-aware - it simply boots from sda1, which is the first drive on the first disk (i.e. highest in the physical machine).
Root partition, /. Mirrored, just like sda1. Again stock firmware will automatically synchronise with other partitions upon boot.
This is simply an extended partition to hold other logical partitions.
Swap partition, and is striped across all the drives.
Data Partition. By default is RAID 5 (striped-with-parity) across all drives. Web interface lets you switch between RAID levels or simply turn it off for these drives.