> Ah if your disk are using write back cache then you are going to hit > some problems. So if you see this in /var/log/messages when you loging: > > kernel: sd 9:0:0:1: [sdb] Write cache: enabled, > > then later when you run iscsiadm to log out you see: > > kernel: sd 9:0:0:1: [sdb] Synchronizing SCSI cache > > Then you are going to hit problems due to the scsi sysfs interface > changing on us. iscsiadm is going to hang. IO is going to hang. You > basically have to reboot the box by hand.
Mike, Are you sure about this? When the sysfs entries are deleted (during the iscsiadm logout phase), the SCSI ml finishes all of the I/Os and the last operation is sending the SCSI Cache command. Wouldn't that quiesce I/O ? Granted this means doing these steps which are outside the normal iscsiadm: 1). flush dirty pages (call 'sync') 2). delete the sysfs entries (echo 1 > /sys/block/sdX/device/delete) 3). wait until /sys/class/scsi_host/hostZ/host_busy reaches zero 4). iscsiadm -m logout --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
