I have a USB disk connected to a Poweredge server. The USB Disk is a Mad Dog MegaVault with a 160GB drive installed. It's all working fine, but the external LED on the unit is not working. I'm currently running a script (yum-pull) for setting up a yum mirror and it sits for long periods of time seemingly doing nothing. I started the script this morning at 6:20 for my FC4 yum mirror and it's now 8:50 and it's still running. A "top" shows very little activity from a CPU perspective. The guy who wrote the script says there's probably tons of disk activity going on. The script does continue to run because it will eventually finish. One might think the slowness is because it's a USB drive, but I can copy large amounts of data and do permission changes on files, at the same time this script is running, and it all happens quickly. Guess I'm just trying to verify whether there really is a lot of disk activity going on. I tried looking at ksysguard, but wasn't very successful at seeing what I wanted. I'm not sure I want to use yum-pull if it take 3 hours to run per mirror. Right now I'm mirroring FC4, but I also want to do Centos 4.0 and 4.2, and maybe even Suse 9.2. Are there any other disk activity monitors I should try? Thanks, James