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VMAX silent Data Corruption. Is it even possible?
We have a VMAX 10 and have gotten reports from our customer that they are seeing intermittent block corruptions on a two node Oracle RAC cluster. My question: Is silent corruption possible for data stored in a VMAX. I guess I assummed that the use checksums would make it virtually impossible to return a corrupted block to a host.
Could someone help me understand which techniques are used within the VMAX to assure corrupted data is not returned to a host?
Thanks,
Vic
vic_engle
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September 13th, 2014 11:00
After doing some reading, I think I've answered my own question. With CRC and parity checking in the datapaths and CRC and T10 DIF checking on blocks at rest it seems just about impossible to corrupt data internally.
PedalHarder
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September 14th, 2014 17:00
In and SRDF environment, we also do Remote Data Compare (RDC). This is background check to validate that the R1 and R2 data is consistent.