On Wed, Jan 15, 2025 at 4:46 AM Nicolas George <geo...@nsup.org> wrote: > > Jeffrey Walton (12025-01-15): > > Reliably Erasing Data from Flash-Based Solid State Drives, > > <https://www.usenix.org/legacy/event/lisa11/tech/slides/wei.pdf>, > > The word compression does not appear in this document. Would you be so > kind as to explain why you considered it relevant? > > > Practical Erase Suspension for Modern Low-latency SSDs, > > <https://www.usenix.org/system/files/atc19-kim-shine.pdf>, In-drive > > The word compression does not appear in this document. Would you be so > kind as to explain why you considered it relevant? > > > SSD compression boosts performance and endurance, > > <https://blocksandfiles.com/2019/09/03/compression-inside-qlc-ssd-endurance/> > > and friends. > > This looks like an uncritical quote from a drive manufacturer. > Furthermore, it does not support your precise claim: > > > > > Probably better since disk controllers often use compression to > > > > minimize writes and blocks written during a write cycle.
Using a random stream during zeroization due to write compression has been a security control for at least 15 years. This should be no surprise to anyone nowadays. Here's a few more references for you. If you don't find them satisfactory, then I suggest you do your own research. Compression and SSD: Where and How?, <https://www.usenix.org/system/files/conference/inflow14/inflow14-zuck.pdf>, Data Compression in the Intel® Solid-State Drive 520 Series, <https://www.intel.com/content/dam/www/public/us/en/documents/technology-briefs/ssd-520-tech-brief.pdf>, Benchmarking SSDs with Transparent Compression, <https://scaleflux.com/blog/benchmarking-ssds-with-transparent-compression/>, SSD with Compression: Implementation, Interface and Use Case, <https://files.futurememorystorage.com/proceedings/2019/08-07-Wednesday/20190807_CTRL-201-1_Haratsch.pdf>, Real-Time Data Compression’s Impact on SSD Throughput Capability, <https://www.enterprisestorageforum.com/hardware/real-time-data-compressions-impact-on-ssd-throughput-capability/> Jeff
