On Wed, May 04, 2022 at 09:16:55PM +0100, James Dutton wrote: > Hi, > > Use case: > Boot from a USB disk and run for a day. > Sometimes the USB link disconnects and reconnects. > When it reconnects, Linux cannot use it, and the Linux kernel has set > the device mount to read only. > Is there any way to allow a USB disk to disconnect and then reconnect > it, and Linux carry on using it, and not set it to a read-only mount, > provided of course, that it knows that the same disk was reconnected > without being changed. > For example, I have a usb disk device that goes into power save mode > if not accessed for more than 15 mins. When I come back to unlock the > screensaver, it does not wake up the disk, but instead places it in > read-only mode. This necessitates me to reboot the PC to get it > working again. > > Any ideas? There is no way to know what is going on unless you provide a lot more information. The dmesg log showing what happens during one of these disconnect/reconnect events would be a good start (although it probably won't be enough). Alan Stern
