is there any command for forcing flushing cache or invalidate cache? On Wed, Apr 27, 2016 at 3:57 AM, Eric Wheeler <bcache@xxxxxxxxxxxxxxxxxx> wrote: > On Tue, 26 Apr 2016, ching lu wrote: > >> Hi all, >> >> if i have 1 SSD caching 1 HDD using bcache, the cache mode is writeback >> >> if the PC shutdown/unmount normally, will all dirty data in the cache >> be flushed to backing device before poweroff? > > No, it will remain in the cache. > >> i am afraid that SSD lose data if left without power for a long time. >> e.g. hoilday. > > Wouldn't your data be retained if you used the SSD alone? SSDs should be > stable in a powered off state unless it is a bad device. > > There exist RAM-based disks that may be volatile, but that is unlikely to > be your situation. > > -- > Eric Wheeler > >> >> Thanks in advance, >> C >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
