IBM 25R0012 User Guide - Page 66
Resolving, Problems, Reported, Server
UPC - 000435800176
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7. Continue to press the Unload Button until the ten error codes have been displayed. After you display the tenth error code, the drive automatically exits maintenance mode. To redisplay the error codes, repeat steps 1 through 7. Resolving Problems Reported by the Server The procedure for fixing SCSI bus errors varies, depending on whether the error is consistent or intermittent, and whether your configuration contains single or multiple drives. The sections that follow describe how to fix each type of error. Fixing SCSI Bus Errors Note: If you are using a Storage Area Network (SAN) Data Gateway to convert a drive with a SCSI interface to a Fibre Channel interface, ensure that the problem is occurring between the SAN Data Gateway and the drive by running the SCSI wrap test on the drive and running the SCSI loopback test on the SAN Data Gateway. (To run the SCSI wrap test, see "Function Code 6: Run SCSI Wrap Test" on page 20; to run the SCSI loopback test, refer to the section about that test in the IBM Storage Area Network Gateway Module Setup, Operator, and Service Guide.) Fixing a Consistent Error with a Single Drive on a SCSI Bus: 1. Ensure that the power is on to the drive. 2. Ensure that the drive's SCSI address is the same as the SCSI address assigned by the server. 3. Run the SCSI wrap test (see "Function Code 6: Run SCSI Wrap Test" on page 20). v If the test fails, replace the SCSI terminator first, then the SCSI cable and the interposer (if installed). Repeat the operation that caused the error. If you replaced the SCSI terminator or SCSI cable and the problem persists, the fault is with the server's hardware or software. To isolate the cause of the failure, refer to the server's service documentation. v If the test fails again, replace the drive. v If the test is successful, refer to your enclosure documentation for additional troubleshooting information. Fixing a Consistent Error with Multiple Drives on a SCSI Bus: When a consistent error occurs in a configuration that has multiple drives on the SCSI bus, you must determine if the problem exists with more than one drive. If the problem is with all of the devices on the SCSI bus, the bus is stuck in a SCSI phase and cannot change to another phase or the SCSI cable from the server to the first device is defective. 1. Ensure that the SCSI cable from the server to the first device is connected. 2. Disconnect all but the first drive on the SCSI bus. Move the terminator to the first SCSI device. 3. Run a device driver utility to determine whether the error will occur. v If the error occurs, run the SCSI wrap test on the first drive (see "Function Code 6: Run SCSI Wrap Test" on page 20). - If the test runs successfully, replace the SCSI terminator first, then the SCSI cable and the interposer (if installed) to the first drive. Repeat the operation that caused the error. If you replaced the SCSI terminator or 50 IBM 400/800GB LTO3 Tape Drive User's Guide