Difference between revisions of "Iscsi"

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==On ISCSI client==
==On ISCSI client==
===Find targets===
=== Find targets ===
Please logout from all targets on before trying to run discovery on that portal
===List connected targets===
===List connected targets===

Revision as of 18:57, 25 August 2021



On ISCSI client

Find targets


Please logout from all targets on before trying to run discovery on that portal


List connected targets

iscsiadm -m session -P 3

which seems to list only one, for multiple:

tgtadm --lld iscsi --op show --mode conn --tid 1

but that needs more work

List targets

iscsiadm -m discovery -t sendtargets -p

Connect to target

iscsiadm -m node --targetname="iqn.2018-5.mynet:drbd0" --portal "" --login

if you get things like "iscsiadm: No records found" try a thing like

iscsiadm --mode node -l all

Disconnect from target

iscsiadm -m node -T iqn.2018-5.mynet:drbd0 -p -u

Show session id

iscsiadm -m session -P 1

Rescan ??

iscsiadm -m node --targetname="foo.bar" -R

Disconnect all targets

iscsiadm --mode node -u all

Rescan session

iscsiadm -m session -r SID --rescan⁠

On server

list targets

tgtadm --lld iscsi --mode target --op show

list connected targets

To list all connections to target with id 1:

tgtadm --lld iscsi --mode conn --op show --tid 1

And disconnect target:

tgtadm --lld iscsi --op delete --mode conn --tid 1 --sid 2 --cid 0

Create iscsi target and Lun

tgtadm --lld iscsi --mode target --op new --tid=1 --targetname iqn.2009-02.com.example:for.all
tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b /var/tmp/iscsi-disk1

Delete iscsi target and Lun

tgtadm --lld iscsi --mode logicalunit --op delete --tid 1 --lun 1
tgtadm --lld iscsi --mode target --op delete --tid=1

Reload tgtd configuration

tgt-admin --update ALL


tgt-admin --update your.irqn.string

Show tgdt config

tgt-admin --dump

Grow/resize target

After resizing the target (lvresize or whatever)

tgt-admin --update tid=xx -v -f

Show targets

tgt-admin -s

Show target config

This includes target parameters

tgtadm --lld iscsi -o show -m target --tid=1

The disk contains an unclean file system (0, 0).

Metadata kept in Windows cache, refused to mount.
Falling back to read-only mount because the NTFS partition is in an
unsafe state. Please resume and shutdown Windows fully (no hibernation
or fast restarting.)
ntfsfix /dev/sdc1


esxcli storage core path list
storage core adapter rescan --adapter=vmhba
esxcli iscsi adapter discovery rediscover --adapter vmhba64
esxcli iscsi adapter param get -A vmhba64

Error messages

connection1:0: detected conn error (1020)

These messages are seen when an iSCSI connection times out (1011 means timeout on initiator side and 1020 means the target dropped the connection)

tgtadm: failed to send request hdr to tgt daemon, Transport endpoint is not connected

tgtd not running :)


tgtd: iser_ib_init(3436) Failed to initialize RDMA; load kernel modules?

comment out default-driver


iscsiadm: No portals found

ACL issue, try something like

tgtadm --lld iscsi --op bind --mode target --tid 6 -I ALL


iscsiadm: No records found


iscsiadm -m discovery -t sendtargets -p <ip-address>