I purchased a Systemax Windows Small Business Server Standard 2003 system (Systemax 810MC VLS Server) in December. I've had significant trouble with the internal ATAPI Iomega 35/90GB Removable Disk Drive. The disk is used to create backups daily, and it generates errors daily. Specifically, it generates an Event ID 111 (Removable Storage Service: RSM could not load media in Drive 0 of library Iomega RRD).
In addition, the disk drive fails Iomega’s diagnostics (using several different disks, so I don't believe it's the drive media itself at fault). I contacted Tiger Direct customer service in February, and they shipped a replacement drive. The replacement drive is experiencing similar trouble (it generates the same Event ID 111 error), but at least backup information is being written to the drive now, but it's slow. Still, I want to eliminate the errors (and have the device pass Iomega's diagnostic tests).
I’ve contacted Iomega, and they recommended entering Device Manager, selecting IDE ATA/ATAPI Controllers, right-clicking the controller the Rev Drive is attached to (Primary IDE Channel or Secondary IDE Channel) and choosing Properties. From there I’m supposed to click the Advanced Settings tab and change the Transfer Mode menu to DMA if Available for Device 0 and 1.
Now for my question. I can see that the Secondary IDE Channel appears to be in use for the Iomega drive, but I’m not certain. I am fairly confident the device is attached to the secondary IDE port on the system's motherboard (a fact I could confirm quickly by opening the server). I know Tiger Direct/Systemax set this Windows Server 2003 Small Business Edition box up to use a RAID 1 array, and I cannot afford to screw that RAID 1 configuration up (this box now powers a small business that cannot afford any downtime). Can someone verify it’s OK for me to change the Secondary IDE Channel Device 0 Transfer Mode setting from PIO Only to DMA if available? Or might that break the RAID 1 array?