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Fixing Intermittent Fibre Channel Errors
1. Determine the type of Fibre Channel topology that you are using (see page 7).
2. Ensure that the configuration and software levels are supported (see "Fibre
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
5. Using this guide or the service guides of associated switch, hub, or fiber
6. Using this guide or the service guides of associated switch, hub, or fiber
7. Obtain all errors reported by the drive to the server (see "Using Sense Data" on
Resolving Media-Related Problems
To resolve problems that are related to media, the drive's firmware includes:
v Test Cartridge & Media diagnostic that verifies whether a suspect cartridge and
v Statistical Analysis and Reporting System (SARS) to assist in isolating failures
If you encounter a media-related problem, use the following procedure:
1. If possible, run the tape cartridge in a different drive. If the operation in the
2. If the Test Cartridge & Media diagnostic fails, replace the media. If it runs
90
IBM TotalStorage Ultrium Tape Drive
Channel Interface" on page 7).
appropriate steps in "Installing the Drive" on page 13.
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.
products, verify that the SAN configurations are correct (such as switch zoning
for drive sharing).
page 79), then contact your OEM Product Application Engineer (PAE) for error
analysis.
its magnetic tape are acceptable for use.
between media and hardware. To determine the cause of failure, SARS uses the
cartridge performance history that is saved in the cartridge memory (CM) and
the drive performance history that is kept in the drive's VPD (Vital Product
Data) area in NVRAM. Any failures that SARS detects are reported as TapeAlert
flags on the server (see "TapeAlert Flags," on page 111).
Attention
If you insert the IBM LTO Ultrium Data Cartridge into another
manufacturer's drive, the SARS data in the cartridge memory may become
lost or invalid.
Attention
When you run the Test Cartridge & Media diagnostic, data on the suspect
tape is overwritten. Use only a scratch data cartridge to run the test.
6
other drive fails and
succeeds, run the Test Cartridge & Media diagnostic (see "Function Code E:
Test Cartridge & Media" on page 40).
successfully, clean the drive and run the drive diagnostics (see "Cleaning the
Drive Head" on page 31 and "Function Code 1: Run Drive Diagnostics" on
page 33. If the drive diagnostics run successfully, perform the operation that
produced the initial media error.
7
or
displays, replace the media. If the operation
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