Internal Drives in Servers 79
Internal Drives in Servers
If the cartridge is still jammed, press the emergency reset button (see
page 77). Wait for the drive to reset and get back to the loaded position. This
process may take up to 15 minutes (the maximum rewind time). Press and
hold the Eject button for 10 seconds to perform an emergency unload on the
reset drive.
General Guidelines
If you experience problems when using the tape drive, you need to isolate the
cause of the problem. For example, if you have just installed a new SCSI host
bus adapter and your system will not start, the cause of the problem is likely
to be the adapter.
When installing multiple items of hardware and software, we recommend that
you install each in turn and restart the system each time. Similarly if you have
already installed multiple devices and software and you experience problems,
remove or uninstall each in turn to establish which one is causing the
problem.
Remember that the system recognizes devices during boot-up. If you swap or
connect a product when your system is running, you will need to reboot the
system. Rebooting the system will reset devices and will often resolve
problems. It is good practice to reboot every time you add a driver or install
firmware.
Diagnosing the Problem
The first step in problem-solving is establishing whether the problem lies with
the cartridge, the drive, the host computer and its connections, or with the
way the system is being operated.
Problems with the Host Computer
Most modern SCSI host bus adapters locate and display attached devices
when the system is booting up. If the device is not detected at this stage, there
is probably a problem with the physical hardware: cables, termination,
connections, power or the HBA itself. Refer to the page 72 for a detailed
discussion of SCSI IDs, termination and cabling.
If your drive is found on system boot up but cannot be found in the operating
system, this is more likely to be a software problem.