IBM B-Series, Maintenance Information

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FID FE—Isolate Fault between Media and Hardware
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A FID FE will be generated when the drive experiences an error and cannot determine if the error was
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caused by the tape cartridge or by a problem in the drive hardware. The FID FE is not displayed on the
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drive, but is logged in the sense information that is returned to the host system. If the customer receives
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errors when reading or writing to the drive and there is no FID displayed on the drive, a FID FE was
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probably returned in the sense information to the host. If needed, refer to the MSG section to determine
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how to obtain service information from the host system.
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To determine the cause of the read or write errors, follow the steps below:
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1. Ensure that the tape drive is not overdue for cleaning:
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a. If a Model B00, clean if the CLEAN LED is lit.
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b. If a Library Model tape drive, ensure that the AUTO CLEAN option is ON and that a cleaner
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cartridge is installed.
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c. Always avoid excessive cleaning as this will damage the heads.
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2. Determine which VOLSER #s, cartridges or hardware area are potential problems:
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a. Ask the customer to note which cartridges (VOLSER #s) fail during the operation. (It is possible to
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have multiple bad cartridges.)
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b. Examine the FID FE log using the "LOGS" option of the CE Menu on the operator panel. Collect
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FID information. See Figure 130 on page PANEL-27 and Figure 155 on page PANEL-45. The FE
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log will display entries for up to 10 of the most recent occurrences of the FE error. Each entry
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consists of information that pertain to the error:
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1) The first line provides an alternate FID number that you can use to isolate the problem.
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2) The second line displays the first and last FSC's and the microcode link.
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3) The third line provides a power-on date/time stamp which can be corollated with power-on
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hours in the "Show Statistics Menu", or a “Current Time Stamp” option (if present).
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3. Determine if the cartridges are bad:
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a. Examine cartridge for damage, for example, leader block not attached or cracked cartridge. If
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damaged, ask customer to repair or replace cartridge.
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Note: a repaired cartridge may be used long enough to recover data on that cartridge. When the
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data has been recovered, the cartridge should be taken out of service by the customer and
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discarded.
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b. If the cartridges look OK and you have access to another 3570 try the operation with the suspect
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cartridges in another 3570.
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c. Have the customer replace any cartridges that have failed in more than one 3570.
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4. If the cartridges are not bad, isolate the problem to a drive FRU:
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a. Examine the log entries and using the alternate FID numbers provided, try to determine a common
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reason for the FE errors.
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b. Use the error log analysis procedure at “Error Log Analysis Procedure” on page PROC-48 as an
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approach to problem isolation.
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5. Correct the failure:
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a. Before replacing any FRUs, check the head cable connections. Make sure that the head cables
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are not loose. After replacing FRUs, go to 5b.
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b. Test the drive:
PROC-98
IBM 3570 MI