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Dear Amazon Web Services Customer,
Your volume experienced a failure due to multiple component failures and we were unable to recover it. Although EBS volumes are designed for reliability, including being backed by multiple physical drives, we are still exposed to durability risks when multiple concurrent component failures occur before we are able to restore redundancy. We publish our durability expectations on the EBS detail page here (http://aws.amazon.com/ebs/details).
Account Number: 0111111111111
Region: eu-west-1
Impacted Resource Identifier: vol-011111111
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EBS durability is reasonably good for a regular hardware drive (annual failure rate of between 0.1% - 0.2%). On the other hand, that is very poor if you don’t have backups! By contrast, S3 durability is extremely high. If you care about your data, back it up to S3 with snapshots.
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When restoring a snapshot to create an EBS volume, blocks are lazily read from S3 the first time they're referenced. To avoid an initial period of high latency, you may wish to use dd or fio as per the official documentation.
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