This was the log message generated during the process of
1. Initiator logged into target
2. Target machine "iscsi-target" daemon restarted
3. So Exported disk becomes unusable on initiator side.
----------------------------------------------------------------------------------
> scsi5 : iSCSI Initiator over TCP/IP
> Vendor: IET Model: VIRTUAL-DISK Rev: 0
> Type: Direct-Access ANSI SCSI revision: 04
> SCSI device sdg: 2097152 512-byte hdwr sectors (1074 MB)
> sdg: Write Protect is off
> sdg: Mode Sense: 77 00 00 08
> SCSI device sdg: drive cache: write through
> SCSI device sdg: 2097152 512-byte hdwr sectors (1074 MB)
> sdg: Write Protect is off
> sdg: Mode Sense: 77 00 00 08
> SCSI device sdg: drive cache: write through
> sdg: sdg1
> sd 5:0:0:0: Attached scsi disk sdg
> sd 5:0:0:0: Attached scsi generic sg6 type 0
> connection4:0: iscsi: detected conn error (1011)
---------------------------------------------------------------------------------------------------
On May 8, 2:46 pm, MAKHU <[EMAIL PROTECTED]> wrote:
> One more question in context to previous one,
>
> When ISCSI Target is restarted, "/proc/net/iet/session" file changes
> with some major delay.
> And this delay is not same all the time.It is sometimes less and
> sometimes more.
>
> After this delay,sessions are restored.But disk exported by this
> target becomes unusable for the Initiator logged in ito it.
>
> But ISCSI Target restart is necessary for addition/deletion of targets/
> Lun changed to reflect.
>
> My aim is "Persistent Connection after target restart".Means disks
> should be in "running" state rather than "Blocked".
>
> On May 8, 1:06 pm, MAKHU <[EMAIL PROTECTED]> wrote:
>
> > KVER=`uname -r`
> > MODPATH=/lib/modules/${KVER}/kernel/iscsi
>
> > stop() {
> > ietadm --op delete
> > killall ietd
> > rm -f /var/run/iscsi_trgt.pid
> > rmmod $MODPATH/iscsi_trgt
> > modprobe -r iscsi_trgt
>
> > }
>
> > start {
> > modprobe iscsi_trgt
> > daemon /usr/sbin/ietd -d 0}
>
> > -----------------------------------------------------------------------------------------------------------
> > Output of "iscsiadm -m session -i" before Target restart..
>
> > Check last entry of state of "iqn.2008-04.com.qualexsystems
> > :Admin" as running.
>
> > [EMAIL PROTECTED] ~]# iscsiadm -m session -i
> > iscsiadm version 2.0-742
> > ************************************
> > Session (sid 42) using module tcp:
> > ************************************
> > TargetName: iqn.2008-04.com.qualexsystems:Tar1
> > Portal Group Tag: 1
> > Network Portal: 192.168.7.71:3260
> > iSCSI Connection State: LOGGED IN
> > Internal iscsid Session State: NO CHANGE
>
> > ************************
> > Negotiated iSCSI params:
> > ************************
> > HeaderDigest: CRC32C
> > DataDigest: CRC32C
> > MaxRecvDataSegmentLength: 8192
> > MaxXmitDataSegmentLength: 8192
> > FirstBurstLength: 65536
> > MaxBurstLength: 262144
> > ImmediateData: No
> > InitialR2T: Yes
> > MaxOutstandingR2T: 1
>
> > ************************
> > Attached SCSI devices:
> > ************************
> > Host Number: 43 State: running
>
> > scsi43 Channel 00 Id 0 Lun: 0
> > Attached scsi disk sdi State: running
>
> > ************************************
> > Session (sid 61) using module tcp:
> > ************************************
> > TargetName: iqn.2008-04.com.qualexsystems:Admin
> > Portal Group Tag: 1
> > Network Portal: 192.168.7.173:3260
> > iSCSI Connection State: LOGGED IN
> > Internal iscsid Session State: NO CHANGE
>
> > ************************
> > Negotiated iSCSI params:
> > ************************
> > HeaderDigest: CRC32C
> > DataDigest: CRC32C
> > MaxRecvDataSegmentLength: 8192
> > MaxXmitDataSegmentLength: 8192
> > FirstBurstLength: 65536
> > MaxBurstLength: 262144
> > ImmediateData: No
> > InitialR2T: Yes
> > MaxOutstandingR2T: 1
>
> > ************************
> > Attached SCSI devices:
> > ************************
> > Host Number: 62 State: running
>
> > scsi62 Channel 00 Id 0 Lun: 0
> > Attached scsi disk sdj State: running
> > ------------------------------------------------------------------------------------------------------------------------------------------
>
> > When i restared "iscsi daemon" on target machine.
>
> > [EMAIL PROTECTED] ~]# iscsiadm -m session -i
> > iscsiadm version 2.0-742
> > ************************************
> > Session (sid 42) using module tcp:
> > ************************************
> > TargetName: Tar1
> > Portal Group Tag: 1
> > Network Portal: 192.168.7.71:3260
> > iSCSI Connection State: LOGGED IN
> > Internal iscsid Session State: NO CHANGE
>
> > ************************
> > Negotiated iSCSI params:
> > ************************
> > HeaderDigest: CRC32C
> > DataDigest: CRC32C
> > MaxRecvDataSegmentLength: 8192
> > MaxXmitDataSegmentLength: 8192
> > FirstBurstLength: 65536
> > MaxBurstLength: 262144
> > ImmediateData: No
> > InitialR2T: Yes
> > MaxOutstandingR2T: 1
>
> > ************************
> > Attached SCSI devices:
> > ************************
> > Host Number: 43 State: running
>
> > scsi43 Channel 00 Id 0 Lun: 0
> > Attached scsi disk sdi State: running
>
> > ************************************
> > Session (sid 61) using module tcp:
> > ************************************
> > TargetName: iqn.2008-04.com.qualexsystems:Admin
> > Portal Group Tag: 1
> > Network Portal: 192.168.7.173:3260
> > iSCSI Connection State: IN LOGIN
> > Internal iscsid Session State: REPOEN
>
> > ************************
> > Negotiated iSCSI params:
> > ************************
> > HeaderDigest: None
> > DataDigest: None
> > MaxRecvDataSegmentLength: 8192
> > MaxXmitDataSegmentLength: 8192
> > FirstBurstLength: 65536
> > MaxBurstLength: 262144
> > ImmediateData: No
> > InitialR2T: Yes
> > MaxOutstandingR2T: 1
>
> > ************************
> > Attached SCSI devices:
> > ************************
> > Host Number: 62 State: running
>
> > scsi62 Channel 00 Id 0 Lun: 0
> > Attached scsi disk sdj State: blocked
> > --------------------------------------------------------------------------------------------------------------------------------
> > MY QUES. IS........
>
> > After restarting target,Why disk becomes unused on the initiator side?
> > Though disk remains as logged in,but becomes unusable.
> > -------------------------------------------------------------------------------------------------------------------------------
> > This was ur reply
>
> > Could you resend this to the list, with an explanation of what
> > restarting
> > iscsid means. Did you leave sessions running, kill iscsid, then
> > restart
> > iscsid? If so when iscsid starts up it syncs up the sessions. It shows
> > the
> > device as blocked and the session as not logged in, because for some
> > reason it cannot log back in (you would need to send some more log
> > output
> > to know why (maybe run iscsid with -d 8 when you restart it).
> > ------------------------------------------------------------------------------------------------------------------------
> > I had tried both "iscsid with -d 8" and latest "initiator-target" pair
> > as well.
> > Still the problem persists and disk becomes unusable after restarting
> > iscsi-target.
>
> > What can be the problem?Or Persistent connection is not possible.
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