Nope, it was a single-drive NAS.
This model, I'm pretty sure, but it could be the one before it.
After fdisk -l:
Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000c2ec5
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 15728639 7863296 83 Linux
/dev/sda2 15730686 16775167 522241 5 Extended
/dev/sda5 15730688 16775167 522240 82 Linux swap / Solaris
After cat /proc/partitions:
major minor #blocks name
8 0 8388608 sda
8 1 7863296 sda1
8 2 1 sda2
8 5 522240 sda5
11 0 1048575 sr0