Runnig udevadm trigger (udevadm version 147) does not repopulate the / dev disk entries. During the fail over IO is being sent to the disk and there are IO errors relating to this disk during this time. I will report back when this development environment is accessible again with more specific details and error messages and try dd if=/dev/sdd of=/ dev/null on the disk while fail over is occurring as well.
On May 5, 11:51 am, Mike Christie <[email protected]> wrote: > On 04/30/2010 02:07 PM, Preston Connors wrote: > > > FDISK OUTPUT AFTER FAIL OVER: > > r...@kvm-host-3:~# fdisk -l /dev/sdd > > <no output> > > It is weird that the /dev/sdd link is now gone, but iscsiadm can see the > disk below. iscsiadm looks in /sys/block. It does not look at the /dev dir. > > The iscsi layer does not really do anything wrt /dev population except > transport requests. I wonder what is removing the /dev links during this > time. It is not the iscsi layer or tools (we do not touch that stuff). > Are you using udev? Is it possible to rerun udev to create the /dev > links? Do you see anything in /dev/disk? > > While the failover is occurring are you running IO through the FS? Do > you see IO errors in /var/log/messages during this time? > > After the failover, if you try to send IO to the FS what IO errors do > you see in /var/log/messages? > > If you just do IO directly to the disk, before and after the failover > (so just leave a dd if=/dev/sdd of=/dev/null running during the test) do > you see any IO errors in /var/log/messages? > > > > > ISCSIADM OUTPUT AFTER FAIL OVER: > > r...@host:~# iscsiadm -m session -P 3 > > iSCSI Transport Class version 2.0-870 > > iscsiadm version 2.0-870 > > > Target: iqn.1986-03.com.sun:mirror:iscsi-failover-test > > Current Portal: 192.168.1.1:3260,2 > > Persistent Portal: 192.168.1.1:3260,2 > > ********** > > Interface: > > ********** > > Iface Name: default > > Iface Transport: tcp > > Iface Initiatorname: iqn.1993-08.org.debian:01:bb82d0f5e87f > > Iface IPaddress: 192.168.1.2 > > Iface HWaddress: default > > Iface Netdev: default > > SID: 3 > > iSCSI Connection State: LOGGED IN > > iSCSI Session State: LOGGED_IN > > Internal iscsid Session State: NO CHANGE > > ************************ > > Negotiated iSCSI params: > > ************************ > > HeaderDigest: None > > DataDigest: None > > MaxRecvDataSegmentLength: 131072 > > MaxXmitDataSegmentLength: 32768 > > FirstBurstLength: 65536 > > MaxBurstLength: 524288 > > ImmediateData: Yes > > InitialR2T: Yes > > MaxOutstandingR2T: 1 > > ************************ > > Attached SCSI devices: > > ************************ > > Host Number: 6 State: running > > scsi6 Channel 00 Id 0 Lun: 0 > > Attached scsi disk sdd State: running > > -- > You received this message because you are subscribed to the Google Groups > "open-iscsi" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/open-iscsi?hl=en. -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.
