On Mon, 7 May 2018 18:25:40 -0700 Patrick Mansfield <patmans@xxxxxxxxxxx> wrote: > On Mon, May 07, 2018 at 11:12:16PM +0200, T_POL wrote: > > On Mon, 7 May 2018 12:54:48 -0700 > > Rick Stevens <ricks@xxxxxxxxxxxxxx> wrote: > > > > > On 05/04/2018 02:58 PM, T_POL wrote: > > > > On Fri, 4 May 2018 14:20:13 -0700 > > > > Rick Stevens <ricks@xxxxxxxxxxxxxx> wrote: > > > > > Both "udevadm" commands lists nothing after plugging the drive. > > > > The only way to make the drive detected is to run as root the following command : > > > > > > > > "echo "- - -" > /sys/class/scsi_host/host5/scan" > > > > > > > > Found it with google :) > > > > > > Yeah, google is your friend (at times). That would trigger a SCSI bus > > > scan. > > > > > > > Immediately after that, disk is detected. > > > > > > It's odd that it's not seen at all except if plugged in at boot. Sounds > > > like a bug, although I don't know if it'd be in the SCSI driver, hotplug > > > code or kernel itself. I'd sure bugzilla it. > > > > well, never opened a bugzilla in my (long) life. > > May be this will be the first time. > > Are you sure there's nothing else in the log files? > > It could be an odd timing bug, such that delaying a bit before scanning avoids the > problem. > > You can also enable scsi debug output, plug it in, see that it's not found, manually > scan it, and check the output. > > Then boot with scsi debug enabled, and compare the output to that seen during the > hotplug of the device. > > Warning: enabling scsi logging can make your system unusable! > > Before running with logging enabled: > > Disable systemd logging via: > > systemctl stop systemd-journald > > Disable (old style, not on by default) syslog logging via: > > systemctl stop syslog > > When booting (best to edit the boot line manually, less your screw it up), put > scsi_logging_level=1 to enable scsi logging, boot to run level 1, and stop logging > before fully booting - before logging to disk is enabled. i.e. on the boot line, > append: > > scsi_logging_level=1 1 > > After booting, or for testing, or to try and reset it to zero because you left > syslog or wtf running before enabling debug output: > > echo 1 > /sys/module/scsi_mod/parameters/scsi_logging_level > > echo 0 > /sys/module/scsi_mod/parameters/scsi_logging_level > > You can try other debug levels too (up to 4). > > And then post your results to linux-scsi. > > -- Patrick Thanks Patrick, sounds a little bit complicated but I'll try to do it. Angelo > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
