A bcache update

Posted May 15, 2012 19:13 UTC (Tue) by dwmw2 (subscriber, #2063)
In reply to: A bcache update by blitzkrieg3
Parent article: A bcache update

"SSDs are persistent storage and the data is still in the SSD, so why can't this be persistent? The only way this could be a problem is if the mapping is in memory and not written out to the SSD ever."

Or if your SSD is like almost all SSDs ever seen, where the internal translation is a "black box" which you can't trust, which is known for its unreliability especially in the face of unexpected power failure, and which you can't debug or diagnose when it goes wrong.