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Operating Systems AIX mkvg on iscsi disk won't work (6.1) Post 302420571 by zaxxon on Wednesday 12th of May 2010 03:45:26 AM
Old 05-12-2010
We are not using iSCSI so I can't help that much, sorry - found those two articles on how to implement iSCSI:

SVC Information Center

This one on an example using CISCO hardware and a DS4000. As far as I could understand from other sites, the step where you have to define iSCSI targets in /etc/iscsi/targets and the chdevs etc. will be the same for other models of hardware:
Implement iSCSI on AIX

And one more:
Help -

If you get it working, leave a note here what did the trick, ty.

Not sure how good your german is - here is one more describing what to do:
Stor IT Back - herstellerunabhängige Beratung

Some translation of it:
  • Since AIX 5.2 iSCSI is implemented to the OS.
  • Need a working TCP/IP connection to the storage.
  • Is a ping to the iSCSI target successful, you can the software initiator(?) be installed.
  • With "smitty -> chgiscsisw" the iSCSI-initiator will be created.
  • Further configuration has to be done in /etc/iscsi/targets.
Here an example performance tuning for iSCSI he describes in his article:
Quote:
ifconfig en3 down
ifconfig en3 detach

chdev -a ent3 -a jumbo_frames=yes
chdev -l en3 -a tcp_recvspace=262144
chdev -l en3 -a tcp_sendspace=262144
chdev -l en3 -a rfc1323=1

ifconfig en3 up
At the end he points at Implement iSCSI on AIX too.
 

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ISCSI-TARGET(8) 					    BSD System Manager's Manual 					   ISCSI-TARGET(8)

NAME
iscsi-target -- service remote iSCSI requests SYNOPSIS
iscsi-target [-46DV] [-b block length] [-f configuration file] [-p port number] [-s maximum number of sessions] [-t target name] [-v verbose arg] DESCRIPTION
iscsi-target is the server for iSCSI requests from iSCSI initiators. iscsi-target listens for discovery and login requests on the required port, and responds to those requests appropriately. Options and operands available for iscsi-target: -4 iscsi-target will listen for IPv4 connections, and respond back using IPv4. This is the default address family. -6 iscsi-target will listen for IPv6 connections, and respond back using IPv6. -b blocksize Specify the underlying block size for iSCSI storage which will be served. The possible sizes are: 512, 1024, 2048, and 4096 bytes, with the default being 512 bytes. -D When this option is specified, iscsi-target will not detach itself from the controlling tty, and will not become a daemon. This can be useful for debugging purposes. -f configfile Use the named file as the configuration file. The default file can be found in /etc/iscsi/targets. See targets(5) for more informa- tion. -p port number Use the port number provided as the argument as the port on which to listen for iSCSI service requests from initiators. -s maximum number of sessions Allow the maximum number of sessions to be initiated when connecting to the target. -t filename The target name (as it appears to the iSCSI initiator) can be specified using this flag. -V iscsi-target will print the utility name and version number, and the address for bug reports, and then exit. -v argument The amount of information shown can be varied by using this command. Possible values of argument are net to show network-related information, iscsi to show iSCSI protocol-related information, scsi to show SCSI protocol information, and all to show information from all of the above arguments. FILES
/etc/iscsi/targets the list of exported storage /var/run/iscsi-target.pid the PID of the currently running iscsi-target SEE ALSO
targets(5) HISTORY
The iscsi-target utility first appeared in NetBSD 4.0. BSD
May 27, 2006 BSD
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