HDD - add a second harddisk

From NAS-2000.org

The IDE controller of the NAS2000 supports 2 harddisks. You can use them as 2 different harddisks (/dev/hda as /mnt/IDE1 and /dev/hdb as /mnt/IDE2) or as a RAID1 (as /mnt/MD1). If you connect two harddisks you can choose in the "RAID Setting" RAID1. If you confirm the NAS2000 will reboot. (After the restart the harddisks where empty, but it wasn't RAID1. I had to do it another time and then after the second reboot the NAS2000 began to build the RAID1. I had to wait about 90 minutes with two 80GB harddisks and a 40-wire-IDE-cable.) Now you have a RAID1 (/mnt/MD1). You have to reconfigure all the settings (and save the new configutation!), because the old "config.tar" dosn't work. If you use a config-file which is not for RAID1 you will have a RAID1 (/mnt/MD1) with only 1 harddisk (/dev/hda) and a second harddisk (/dev/hdb) mountd as /dev/IDE1. (I was not able to tell the NAS2000 to use 2 harddisks in the raid to. But I saved the new configuration befor and played it back to the NAS2000.) If you choose a device and push the "exchange"-button you have to rebuild the raid, but it still exist with one disk. Before you rebuild the raid the exchanged-harddisk will be mounted as a singel harddisk as /mnt/IDE1, but the /mnt/MD1 still exists and you can use it normally. If you change the jumper (master/slave) the system knows anyway the exchanged-device. But if you use only one harddisk you can use both as a part of the RAID1 and rebuild the RAID1 with another harddisk. If you disconnect one harddisk it will be the same as exchanging a device. During the rebuild you can use the raid and change data on it.

The original power supply has "only" 2,0A for 12V and 2,0A for 5V. You have to check the lables on you harddisk if the power supply brings enought current for 2 harddisks plus the consumption of the board. If not, you have to change the power supply. (I have 2 80GB Disks with 0,5A (12V) each, and it works fine.)