After installing Arcserve Backup, I still cannot see thestorage device.
Make sure that all cards, cables, and devices are connected properly. Check the following:
If you installed a new card in your system before installing Arcserve Backup, make sure it is seated properly in its slot. If that does not work, try putting the card in a different slot.
Make sure your SCSI bus is terminated properly. The general rule for terminating devices chained to a SCSI bus is that there must be two sets of terminating resistors, one at the beginning of the chain and one at the end. If you only have one device connected to your machine, then you have two devices on the SCSI bus; the host adapter card and the storage device. Both the host adapter card and the storage device should be terminated.
Make sure each SCSI device in the chain has a unique ID number. If you have two storage devices attached to the SCSI bus, each with the same SCSI ID, chances are neither device will work. Set each device to a unique SCSI ID. Check the documentation that came with your hardware for information about changing the ID of the device.
Make sure all the storage devices are turned on. Sometimes if one device in a chain is off, the others will behave erratically.
Make sure your computer's power supply is up to the task. The more cards and peripherals you add to your machine, the more demands you place on the power supply.
Make sure the jumper settings on your adapter board are correct. Check the documentation that came with the board to make sure the jumpers are set correctly for use with your hardware.
Replace the cables you are using with ones you know are good. If the problem goes away, you know you had a bad cable.