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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
“Supported Topologies” on page 4).
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 67.
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 7 on page 29). If it does, perform the
procedure in “Fixing a Consistent Error with a Single Drive on a Fibre
Channel Loop” on page 67.
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 Intermittent Fibre Channel Errors
1. Determine the type of Fibre Channel topology that you are using (see
“Supported Topologies” on page 4).
2. Ensure that the configuration and software levels are supported (see “Fibre
Channel Attachment” on page 3).
3. Check that each Fibre Channel cable does not exceed 500 m (1640 ft).
4. Ensure that all Fibre Channel cables are installed correctly. Refer to the
appropriate steps in “Chapter 3. Installing the Tape Drive” on page 9.
5. Using this guide or the service guides of associated switch, hub, or fiber
products, determine that a problem exists between the drive, drive cable, and
the device to which they attach. Try to isolate which part of the Storage Area
Network (SAN) is experiencing problems.
6. Using this guide or the service guides of associated switch, hub, or fiber
products, verify that the SAN configurations are correct (such as switch zoning
for drive sharing).
7. Obtain all errors reported by the drive to the server (see “Using Sense Data” on
page 59), then contact your nearest Customer Assistance Center for error
analysis (see “Getting Help” on page 90).
68 IBM Ultrium Internal Tape Drive
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