I use the MD5 solution mentioned above, but also back everything up to Amazon Glacier. From what I've read, retrieving your data can be a pain, but storage is only $1 a gigabyte per month and they say that they store multiple copies across multiple locations and periodically check for data integrity. If data integrity is lost, they repair it using the other copies. I asked them how often data is checked for integrity and they said:
"Amazon Glacier is designed to provide average annual durability of 99.999999999% for an archive. The service redundantly stores data in multiple facilities and on multiple devices within each facility. To increase durability, Amazon Glacier synchronously stores your data across multiple facilities before returning SUCCESS on uploading archives. Glacier performs regular, systematic data integrity checks and is built to be automatically self-healing.
So, to address your first question, we performs checks frequently enough to ensure that we meet our design goal of 11 9s of average annual durability for an archive. In the very unlikely event that it is determined that one of your archives is not recoverable, we would contact you promptly."
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What command are you referring to?
I use the MD5 solution mentioned above, but also back everything up to Amazon Glacier. From what I've read, retrieving your data can be a pain, but storage is only $1 a gigabyte per month and they say that they store multiple copies across multiple locations and periodically check for data integrity. If data integrity is lost, they repair it using the other copies. I asked them how often data is checked for integrity and they said:
"Amazon Glacier is designed to provide average annual durability of 99.999999999% for an archive. The service redundantly stores data in multiple facilities and on multiple devices within each facility. To increase durability, Amazon Glacier synchronously stores your data across multiple facilities before returning SUCCESS on uploading archives. Glacier performs regular, systematic data integrity checks and is built to be automatically self-healing. So, to address your first question, we performs checks frequently enough to ensure that we meet our design goal of 11 9s of average annual durability for an archive. In the very unlikely event that it is determined that one of your archives is not recoverable, we would contact you promptly."