Studio Network Solutions (SNS) provides a software-based iSCSI initiator called globalSAN that can be downloaded and used free of charge from their site. Alternatively you can also look into the Atto Xtend SAN, which runs about $200 for 1 user with volumes discount slashing the prices to about $90 for 100 users.
Here I will provide successfully solution how to make Backup disk for Mac OS X 10.6 'Snow Leopard' over iSCSI LUN from NetAPP.
Download the Free globalSAN iSCSI Initiator for OS X and install it in Leopard or Snow Leopard. A restart will be required after installation. File name: globalSAN 4.1.0.279.dmg (Third-party software versions may change over time.) This application will not connect to an iSCSI Target when using CHAP Authentication. Unfortunately, it seems as though the globalSAN iSCSI initiator doesn't seem to fully work with Lion (you can connect to targets but Lion won't see them). The only other initiator I have found is ATTO's Xtend SAN iSCSI Initiator which sells for $195 according to their website.
Following this instruction:
1) downloading iSCSI initialization for Mac OS X 10.5x
globalSAN_3.3.0.43.dmg.zip
2) Unzip and mount it by diskutil and install 'globalSAN iSCSI 3.3.0 Installer.mpkg' by double click, following the installation instruction at the end is necessary to rebook Mac for installing iSCSI kernel extension.
3) After Mac restarted, open 'System Preferences' – > 'globalSAN iSCSI' ( in Studio Network solutions ).
4) goto to preferences tab and copy the 'Initiator Name'. Example: ' iqn.2005-03.com.sns:mac-osx-mac-pro'
5) Now connecting to the NetApp command line interface and execute bellow commands:
netapp01> lun create -s 500g -t windows_gpt /vol/smaccel/macosxlun
lun create: created a LUN of size: 500.1g (536952700928)
Comment: here important to show Lun file system type as windows_gpt, all others Mac will not understand
netapp01> igroup create -i -t windows macosx
Comment: here necessary to show 'windows' type of group
Iscsi Tutorial
netapp01> igroup add bridget iqn.2005-03.com.sns:mac-osx-mac-pro
Comment: here we assigning your Mac iSCSI initiator to the group
netapp01> lun map /vol/smaccel/macosxlun macosx
lun map: auto-assigned macosx=0
Comment: here we mapping iSCSI LUN to the our group
netapp01> igroup show
bridget (iSCSI) (ostype: solaris):
iqn.2005-03.com.sns:mac-osx-mac-pro (not logged in) Ncr personal scanner driver for mac download. Total gym ultimate manual.
netapp01> lun show -v
/vol/smaccel/macosxlun 500.1g (536952700928) (r/w, online, mapped)
Serial#: hpj4J4SUSXBx
Share: none
Space Reservation: enabled
Multiprotocol Type: windows_gpt
Maps: macosx =0
netapp01> iscsi security add -i iqn.2005-03.com.sns:mac-osx-mac-pro -s CHAP -p maciscsipassword -n maciscsiuser
Comment: maciscsiuser and maciscsipassword are CAHP username and password for iSCSI authentication
6) Now in Mac -> System Preferences->globalSAN iSCSI in Portals tab we must insert IP address of NetApp storage with created iSCSI LUN
7) After it – go to Targets tab , select IP of NetApp an click at 'Modify' button.
8 ) Check CHAP authentication box and write created username and password, press 'Connect'
9) At 'Sessions' tab select netapp initiator and press 'info'. At button you must see NetApp disk info
If your iSCIS LUN not ready partitioned from Mac OS – after login in to initiator, the Diskutil will automated asked you to initialize new founded RAW partitioned disk.
10) in Diskutils create new one partition 'Mac OS Extended Journaled' with GUID Partition Table.
11) In Time Machine preferences select new iSCSI mounted Disk and switch it On
Globalsan Iscsi Initiator For Os X 10.8