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Full Discussion: iSCSI troubleshooting
Operating Systems AIX iSCSI troubleshooting Post 302495858 by oldmanjoe on Friday 11th of February 2011 11:19:49 AM
Old 02-11-2011
Quote:
Originally Posted by johnf
Is this an ISCSI NAS unit or is it really SAN with a fibre connection. If it is ISCSI NAS then how are you connecting the NAS unit, with ethernet?
It is a SAN via Ethernet. Set up the iSCSI requester, but not on an iSCSI adapter, just an Ethernet adapter that runs iSCSI protocol.

The disk is shown as iSCSI device. Upon which I created the volume group, and filesystems. (not an NFS share or any think like that, all Unix native.)

When the problem occurs, the SAN says AIX is not logged into the SAN (No connection - requester security is minimal, I only restrict by IP - but I could change that to IQN name. But I'm not using CHAP or any other password authentication.)
At the same time, AIX shows the file systems on the SAN as mounted. Shows the VG as active and the disk as there. An attempt to dismount the filesystem or any other activity is usually followed with a long timeout or hanging process. Sometimes I get device not responding messages.

If I could figure out how to get the AIX to re-establish the connection to the SAN, I would assume at that point I could then mount / dismount. filesystems.
 

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ISCSID(8)						   Linux Administrator's Manual 						 ISCSID(8)

NAME
iscsid - Open-iSCSI daemon SYNOPSIS
iscsid [OPTION] DESCRIPTION
The iscsid implements the control path of iSCSI protocol, plus some management facilities. For example, the daemon could be configured to automatically re-start discovery at startup, based on the contents of persistent iSCSI database. OPTIONS
[-c|--config=]config-file Read configuration from config-file rather than the default /etc/iscsi/iscsid.conf file. [-i|--initiatorname=]iname-file Read initiator name from iname-file rather than the default /etc/iscsi/initiatorname.iscsi file. [-f|--foreground] run iscsid in the foreground. [-d|--debug=]debug_level print debugging information. Valid values for debug_level are 0 to 8. [-u|--uid=]uid run under user ID uid (default is the current user ID) [-g|--gid=]gid run under user group ID gid (default is the current user group ID). [-n|--no-pid-file] do not write a process ID file. [-p|--pid=]pid-file write process ID to pid-file rather than the default /var/run/iscsid.pid [-h|--help] display this help and exit [-v|--version] display version and exit. FILES
/etc/iscsi/iscsid.conf The configuration file read by iscsid and iscsiadm on startup. /etc/iscsi/initiatorname.iscsi The file containing the iSCSI initiatorname and initiatoralias read by iscsid and iscsiadm on startup. /etc/iscsi/nodes Open-iSCSI persistent configuration database SEE ALSO
iscsiadm(8) AUTHORS
Open-iSCSI project <http://www.open-iscsi.org/> Alex Aizman <itn780@yahoo.com> Dmitry Yusupov <dmitry_yus@yahoo.com> July 2005 ISCSID(8)
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