2 Oct 2011

Amazon data loss

Posted by iwgcr

A software bug began deleting customer data to Amazon Web Services’s European cloud after the outage after that lightning struck a transformer at one of its power suppliers.

AWS wrote on its status page:

The root cause was a software error that caused the snapshot references to a subset of blocks to be missed during the reference-counting process. As a result of the software error, the EBS snapshot management system in the EU-West Region incorrectly thought some of the blocks were no longer being used and deleted them

.

(source)

Date

Service

Duration

Critical Data Lost

2011-08-08 Amazon 2 days yes

AWS wrote on its status page

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