agspoon wrote: > Thanks for the explanation. > > The rescan seemed to do the trick. I added it to the boot logic, and > caught a blade with this error just yesterday. There are 9 LUNs, but > when this happens it is always LUN-0 that is missing. A "- - -" > rescan found the missing LUN and created the new device (/dev/sdi). > > The target is some funky custom box that no one else in the world > uses ;) > The iscsistart utility returns success, and creates a single session > with multiple LUNs. The first one is occasionally missing (say 1 in > 25 reboots). > > I was wondering if our boot script is not waiting long enough between > loading the iscsi kernel modules, and running iscsistart. I might > play with sleeping for a second between loading the last module, and > trying to make the connection. Just in case it is a race condition. >
The time between loading the kernel modules and running iscsistart should not be an issue. iscsistart has a built in wait. It will log into the target, then it actually does the same command echo "- - -" > /sys.../scan (it does this by doing a write() instead of calling echo). That command then does not return until the scanning is done from the kernel perspective. However, what could happen is that if /dev/sdX was getting created by something like udev as a result of a hotplug event you might need a wait/sleep in there. The kernel will scan and setup the deivce intnernally then send a hot plug event and then return from the "echo - - - ... scan". Userspace apps can then listen for the event and setup the /dev/sdX node. I think for startup/boot though udev does not just listen for hotplug events incase something like this were to happen. I have no idea though :) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
