When you created the LUN
create LUN:
sbdadm create-lu /dev/zvol/rdsk/tank/vol_1
(vol_1 is my old volume on zfs pool tank)

Didn’t it kill your old zvol?

I did exactly the same thing trying to migrate from iscsitgt to COMSTAR and it destroyed my zvols contents.

I have been following a few posts and it seems that creating a new LUN writes data into the first 64 bytes of the zvol, destroying it’s contents.

Did you do anything special in order not to destroy the zvols contents?

Cheers,
Marcio

Glad you got the iSCSI working, and thanks for the COMSTAR info — I’ll have to take a look sometime!

Cheers,
Simon

for your info:

I upgraded my system to SXCE build 116 and now everything works fine. I switched to COMSTAR and i cood use my old volumes. Take a look at COMSTAR!

What I did:

activate COMSTAR:
svcadm enable stmf

everything ok?:
svcs stmf
stmfadm list-state

create LUN:
sbdadm create-lu /dev/zvol/rdsk/tank/vol_1
(vol_1 is my old volume on zfs pool tank)

ok?:
sbdadm list-lu
stmfadm list-lu -v

add view:
stmfadm add-view Note: <- GUID is output of ’sbdadm list-lu’

disable old scsi-target:
zfs set shareiscsi=off tank/vol_1

is old iscsitgtd running?:
svcs iscsitgt

yes, then disable iscsitgt:
svcadm disable iscsitgt

enable new service:
svcadm enable -r svc:/network/iscsi/target:default

ok?:
svcs -a | grep -i iscsi

create new target:
itadm create-target

ok?:
itadm list-target
itadm list-target -v

Then i use globalSAN iSCSI Initiator 3.3.0.43 on my iMac.

COMSTAR: http://wikis.sun.com/display/OpenSolarisInfo/COMSTAR+Administration

Cheers,
Peter

Indeed, the slow write speed to iSCSI targets now with OpenSolaris 2009.06 seem to be caused by the fix for bug 6770534, which uses synchronous writes — i.e. the writes require acknowledgements, rather than just squirting all the write data into a large cache. It looks like the solution will be found by following the thread you mention, as other people certainly seem to have encountered the same problem. Good luck! (I don’t use iSCSI at the moment)

Cheers,
Simon

I used a zfs home fileserver like yours since 18 month. i used iscsi targets with opensolaris. on my imac i use the globalSAN ISCSI Initiator and had a good perfomance. today i switched to 2009.06 and my iscsi perfomace is very bad:

https://opensolaris.org/jive/thread.jspa?messageID=388492

any ideas?

thanks for your home filer blog!!