> 2024年2月3日 01:48，Arnaldo Montagner <armont@xxxxxxxxxx> 写道： > > Thanks for clarifying. > > Regarding the documentation, the first sentence in > https://docs.kernel.org/admin-guide/bcache.html#error-handling says: > "Bcache tries to transparently handle IO errors to/from the cache > device without affecting normal operation" > Oh I see. This is for temporary I/O failure or error. If cache is clear and an I/O error encountered, bcache may fetch data from backing device. Such operations are transparent to upper layer code. > I guess I interpreted it in absolute terms, as some kind of guarantee > that normal operation would not be affected. > For devices failure or absence, bcache need to make upper layer code to be aware and hand the aftermath when necessary. Your situation is in this category. Thanks. Coly Li
