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Subject: TRIM erases user data
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https://blog.algolia.com/when-solid-state-drives-are-not-that-solid/
https://github.com/torvalds/linux/blob/e64f638483a21105c7ce330d543fa1f1c35b5bc7/drivers/ata/libata-core.c#L4109-L4286
http://www.aerospike.com/docs/operations/plan/ssd/ssd_certification.html