Messages in this thread | | | Date | Fri, 18 Mar 2022 10:11:52 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH alternative 2] block: fix the REQ_OP_SECURE_ERASE handling to not leak erased data |
| |
On Thu, Mar 17, 2022 at 10:44:01AM +0100, Ulf Hansson wrote: > Stating that it can't work is probably not a correct statement. > Certainly it can, but it depends on how "secure" (or clever) the > implementation of the FTL is in the flash media. I mean, nothing > prevents the FTL from doing a real erase on erase block level and > simply let the "secure erase" request wait on that operation to be > completed.
Well, that assumes it can find all the previous copied of the data. Having worked with various higher end SSDs FTLs I know they can't, so if an eMMC device could that would very much surpise me given the overhead.
| |