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--- unix:linux:iscsi_tricks_and_techniques [2022/12/17 14:05] – [Adding new target on target device] rodolico
+++ unix:linux:iscsi_tricks_and_techniques [2025/11/27 17:15] (current) – [Resizing your target] rodolico
@@ Line 163: / Line 163: @@
 Ok, you messed up and the target is too small. If you are using LVM2 partitions for your exports (good idea), simply take it offline on the initiators, then add space on the target. Now (and I'm not sure this is required), restart iscsi on the target.
-When you modify a target on the iSCSI target, it is not automatically updated on the initiator. You could simply restart openiscsi or, if you just want to get the new size of one target, log out and the log in again from the initiator.
+However, I generally use a FreeBSD target (with ZFS on it, setting the targets to Volumes). Following assumes you are using FreeBSD ZFS Volumes for your target, and Devuan (Debian) on your initiator.
+<WRAP center round alert 60%>
+Warning: Do not allow anything to access the target during this process. You can probably get by with just shutting down anything which accesses it. Or, for the paranoid amongs us, logout of the target from your initiator, do the work, then log back in.
+</WRAP>
+=== On FreeBSD target ===
 <code bash>
-# log out, then back into target
+# set the new size on the target (assumed to be /storage/iscsi/target in example(
-iscsiadm -m node --target='name of target' --portal "ip:port" --logout\\ iscsiadm -m node --target='name of target' --portal "ip:port" --login
+zfs set quota=<newsize> storage/iscsi/target
+# let ctld know about the change. reload may work instead of restart
+service ctld restart
 </code>
-The size of the target should now be updated (hint, //fdisk -l /dev/disk/bypath/somename// is your friend)
+=== On initiator ===
+You now need to rescan the target from the initiators. The first example rescans everything, which may not be what you want.
+<code bash>
+# probably not the best, since it rescans everything.
+# see next code block.
+iscsiadm -m session --rescan
+</code>
+Better to only scan the one you actually changed. This assumes the target has the substring //thing1// in it.
+<code bash>
+# find the Session ID of the target in question.
+# NOTE: that you can just do iscsiadm -m session for the whole
+# list and manually find the SID (number surrounded by square brackets)
+iscsiadm -m session -P 0 | grep thing1 | cut -d'[' -f2 | cut -d']' -f 1
+# now, rescan only that SID (that one target)
+iscsiadm --mode session --sid=15 --rescan
+# use any tool you like to check the new size. I use fdisk -l, which will
+# return the size on the first line
+fdisk -l /dev/disk/by-path/ip-.....
+</code>
+At this point, your size it set correctly (we hope). Now, you need to resize the file system which is different depending on which file system it is. For virtuals, I generally boot from the gparted live CD (https://gparted.org/download.php) to avoid any problems.
 ==== Remove a target ====