mcs

It is expected. You cannot preclear a disk (i.e. Disk 10) that has been assigned to the array.

You can quickly/easilly try duct tape over the upper half or so of the front mesh, this will force the air to be pulled in through the bottom half, over the drives and motherboard and out the back, which appears to have the fans on the lower half. If this improves your temps, you can look for a neater look or leave it a bit getto...

If that's the case, they both expel hot air out of the case which is always a good thing. Low pressure, cooler air can get into the case from the top. This is not good thermodynamics. Heat rises so drawinig air in from the top is fighting against the natural convection of heat rising. Your also likely to starve the interior of the case of air flow, which result in a rapid temperature increase. In order to cool a system you need good air flow, typically in from the bottom/front and out from the top/back.

This helps pull more air through the drive cages to cool the drives.

The ^M, indicates the file is saved in DOS format rather than Unix format. Use an editor which allows you to save in Unix format, or use fromdos to convert to the Unix format.