Differences between version 22 and predecessor to the previous major change of XenNotes.
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| Newer page: | version 22 | Last edited on Wednesday, August 19, 2009 3:06:26 pm | by GreigMcGill | Revert |
| Older page: | version 20 | Last edited on Wednesday, September 24, 2008 1:08:58 pm | by DanielLawson | Revert |
@@ -48,10 +48,60 @@
* Save and do <tt>/etc/init.d/iscsi-target start</tt>
* Modify <tt>/etc/sysconfig/iptables</tt> to allow port 3260 tcp from the IP addresses running the initiator.
* Attach to the target using the initiator of your choice.
+!!Working around pesky controllers which change HCIL at boot
+See the following, requested by Simon Larsen at http://fragged.nu/2009/05/making-a-tape-drive-available-to-a-guest-via-iscsi/
+
+Simon, if you read this, your captcha on your blog is broken, preventing comments, and there's no contact email address. Hope you find this, and find it useful. ;)
+
+Just bung it in your rc.local.
+
+<verbatim>
+#!/bin/bash
+#
+# This script is a (very) primitive method of determining the current HCIL info
+# for /etc/ietd.conf (config file for iscsi-target) to work around some
+# controllers which change this ID at boot time. You'll probably want to add
+# some data validation of those vars as this is purely for my environments.
+# Feel free to adapt or use it in any way you see fit.
+# Greig McGill. August, 2009
+
+# First set some vars
+
+ietd="/etc/ietd.conf"
+iqn="iqn.2009-08.nz.org.aol.internal:tape0"
+
+# Get the whole HCIL string representing the tape drive.
+# IMPORTANT NOTE: I am assuming there is only one sequential access device.
+# If I am wrong, you WILL need to rewrite this, or badness will happen.
+# You have been warned.
+
+HCIL="`cat /proc/scsi/scsi | grep -B2 Sequential | head -1`"
+
+# Now get each component
+
+H="`echo $HCIL | cut -c 11`"
+C="`echo $HCIL | cut -c 23`"
+I="`echo $HCIL | cut -c 30`"
+L="`echo $HCIL | cut -c 38`"
+
+# Got all that, now generate ietd.conf and restart iscsi-target
+
+cat <<EOT >$ietd
+Target $iqn
+ Lun 0 H=$H,C=$C,I=$I,L=$L,Type=rawio
+ Type 1
+EOT
+
+/etc/init.d/iscsi-target restart
+
+# exit with no error
+
+exit 0
+</verbatim>
See [iSCSINotes] as well for more information
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