Manish Kathuria wrote: > On 3/29/07, tblader <tblader at flambeau.com> wrote: >> >> One drawback is software raid wants a single ide device on each ide >> channel. >> This means buying an ide card (if you want more than two devices) >> which doesn't >> always play well with the rest of the system (4+ ide devices). Some >> mainboards >> might have more than two ide channels, but I just opted for the cheap >> ide card. >> > > Can you please confirm the same or refer to some documentation > indicating that ? I have recently added two HDDs as the slave devices > on Primary and Secondary IDE channels configured as software raid > devices where the two master devices on these IDE channels were > already being used for software raid. Now I have 4 devices on two IDE > channels with partition pairs configured as RAID-1 devices. So far all > the raid devices are working fine though I do expect a deterioration > in performance because of 4 devices on two channels. I would like to > reconfirm if "single ide device on each ide channel" is true for > software raid. Comments please. It is just a performance issue, at least on hardware that works as intended. IDE controllers can only issue one command at a time so you can't even overlap waiting for the seeks to complete on two drives on the same cable - but it won't break anything. -- Les Mikesell lesmikesell at gmail.com