On 1/5/2010 4:44 PM, Matt wrote: > I just installed CentOS 5.4 64 bit release on a 1.9ghz CPU with 8gB of > RAM. It has 2 Western Digital 1.5TB SATA2 drives in RAID1. > > [root at server ~]# df -h > Filesystem Size Used Avail Use% Mounted on > /dev/md2 1.4T 1.4G 1.3T 1% / > /dev/md0 99M 19M 76M 20% /boot > tmpfs 4.0G 0 4.0G 0% /dev/shm > [root at server ~]# > > Its barebones right now. Nothing really running. I intended to move > our current email server over to it eventually. The thing is slow as > mud due to disk I/O though. I have no idea whats going on. > > Here is a bit of iostat -x output. > [...] > > Does anyone have an idea what I have wrong here? This is my first > software RAID install. Built a number of Centos servers without RAID > and they have all worked fine. Did you just create the RAIDs? It will something that size a few hours to complete the initial sync. Try 'cat /proc/mdstat' to see when the sync completes. Until then, expect to have head contention with anything else that might be trying to use the drives. -- Les Mikesell lesmikesell at gmail.com