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9. When the problem is corrected (or determined to be a server problem), restore
all of the fiber cables to their correct position.
Fixing a Consistent Error with Multiple Drives on a Fibre Channel
Loop
Use the following procedure to determine if all of the drives on the Fibre Channel
have the problem:
1. Use a device driver utility (such as ntutil or tapeutil) to verify that the drive is
available and properly configured at the server.
2. Determine the type of Fibre Channel topology that you are using (see page 6).
3. Using this guide or the service guides of associated switch, hub, or fiber
products, try to isolate which part of the Fibre Channel Storage Area Network
(SAN) is experiencing problems.
4. Perform one of the following:
v If the problem exists on a small number of drives, go to “Fixing a Consistent
Error with a Single Drive on a Fibre Channel Loop” on page 79.
v If the problem exists with a large number of drives, perform the following
steps:
a. Disconnect all except one failing drive on the Fibre Channel.
b. Run the Fibre Channel wrap test to determine if a failure occurs on that
drive (see Function Code 6 in Table 9 on page 36). If it does, perform the
procedure in “Fixing a Consistent Error with a Single Drive on a Fibre
Channel Loop” on page 79.
c. Continue to connect one drive at a time to the Fibre Channel loop.
5. When the problem is corrected, restore all of the Fibre Channel cables to their
correct position.
Fixing a Consistent Error in a Point-to-Point Topology
1. Ensure that the tape drive is powered on.
2. Verify that the tape drive’s serial number is the same as the drive serial number
that the server program is using.
3. Ensure that the drive is connected to the host or switch. The drive must be able
to detect light and communicate with the server.
4. Run the Fibre Channel wrap test at the drive’s Fibre Channel connector (see
Function Code 6 in Table 9 on page 36).
v If the test fails, replace the tape drive.
v If the test is successful, go to step 5.
5. Run the Fibre Channel wrap test at the end of the fiber cable (see Function
Code 6 in Table 9 on page 36).
v If the test fails, replace the fiber cable.
v If the test is successful, go to step 6.
6. Check the Fibre Channel cable connection at the server.
7. Using a device driver utility such as ntutil or tapeutil, verify that the drive is
properly configured and available at the server.
8. If the problem persists, the fault may be with the server’s hardware or software.
Refer to your server’s service manual.
9. When the problem is corrected (or determined to be a server problem), restore
all of the fiber cables to their correct position.
80 IBM TotalStorage LTO Ultrium 2 Tape Drive