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3.015 bytes |
Service Hints & Tips |
Document ID: DDSE-3QNJJT |
Servers - 4/10GB tape drive appears hung, error recovery
Applicable to: World-Wide
Symptom:
During tape backup operations the 4/10GB 4mm Tape drive may appear to hang for extended periods of time (up to 15 minutes).
Problem Isolation Guidance:
The tape drive is a 4mm, 4/10GB DAT SCSI Tape Drive, FRU P/N16G8454 or FRU P/N16G8456.
Fix:
The tape drive may be in an Error Recovery Process (ERP). During this process, the tape drive may appear to be hung or inoperative for up to 15 minutes. Do not reboot or force ejection during the ERP. This is a normal tape drive function and no action is necessary. When ERP is complete, the backup will continue.
The Error Recovery Process occurs if the tape drive experiences data write errors above a certain threshold level. Write errors may occur due to the presence of foreign matter, dust, or tape oxide. The tape drive detects a write error, reverses to the beginning of the data block, then moves forward spacing over that area of tape, and re-writes the data record. Then normal write operations continue. While the exact ERP varies by model, this is a normal error recovery occurrence in magnetic tape drives.
If ERP is occurring often, the customer should clean the tape drive with a cleaning cartridge FRU P/N21F8763, or try a new tape, or try a new brand of tape.
SAS KEYWORDS:
PSY2 PSY2TAPE 720 300
MAGNETIC D/T9595 520 9595A
8641 SCSI PSY2ERR 320
SERVER 9595 500 310
D/T8640 D/T8642 D/T9595 LED
D/T8639 D/T9585
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Search Keywords |
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Hint Category |
Tape Drives, Lock-up/Hang, Retain | |
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Date Created |
02-05-96 | |
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Last Updated |
07-01-99 | |
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Revision Date |
07-01-2002 | |
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Brand |
IBM PC Server | |
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Product Family |
PC Server 300, PC Server 310, PC Server 320, PC Server 500, PC Server 520, PC Server 704, PC Server 720, Server 95 | |
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Machine Type |
8640, 8639, 8641, 8650, 8642, 9595, 8595, 9585 | |
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Model |
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TypeModel |
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Retain Tip (if applicable) |
H133402 | |
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Reverse Doclinks |