Excavating
Patent
1996-09-27
1998-10-13
Palys, Joseph
Excavating
39518507, 39518308, 371 271, G06F 1100
Patent
active
058225137
ABSTRACT:
A method and apparatus are provided for detecting stale write data bugs associated with storage systems. The detection is accomplished by choosing a data pattern signature for each block of a storage device to be tested. The data pattern signature is then stored in a write log table which provides an index as to the data pattern signature associated with each block. Then, the block is filled by writing, in a repeating fashion, the data pattern signature until all bytes of the block have been written. At a later time, the entire block is read from the storage device. Once read, each byte retrieved is compared against the value of the data pattern signature currently stored in the write log for that block. If a mismatch is detected, then the error is reported and stored in a error log so that the bug may be eliminated.
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Garrett Brian L.
Ofer Erez
EMC Corporation
Fitzgerald, Esq. Leanne J.
Gunther, Esq. John M.
Palys Joseph
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