On Sun, 21 Aug 2022 at 15:47, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > > The reason being, I have a system that boots from a USB disk. > > Due to interference, the USB device disconnects for a second or two > > and then comes back, but Linux does not see it and I have to reboot > > Linux to recover. So, in this situation I wish Linux to be able to > > recover immediately, without needing a reboot. > > There is no way to do this. For example, consider all those failed > writes that you get error messages about. Once they have failed, the > system does not try to remember them in case there's a possibility of > trying them again later. They're just lost. I guess the solution would have to include a "retry in 1 second's time" type failure mode, instead of just lost. I.e. differentiate between the disk responding that the media failed, and the link being down to the disk so the write message could not be sent. For example, NFS waits around for the network to return, maybe we could add that functionality between a filesystem and usb storage.
