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Contents
1 Introduction...............................................................................................5
Audience.................................................................................................................................5
Supported Configurations..........................................................................................................5
HP 3PAR OS Upgrade Considerations.........................................................................................5
2 Configuring the HP 3PAR StoreServ Storage for iSCSI......................................6
Configuring Ports for an iSCSI Connection...................................................................................6
Creating the Software iSCSI Host Definition..................................................................................7
Ubuntu iscsiadm Utility Usage....................................................................................................8
Target Port Limits and Specifications for iSCSI.............................................................................10
HP 3PAR Priority Optimization for iSCSI.....................................................................................10
HP 3PAR Persistent Ports for iSCSI.............................................................................................10
iSCSI................................................................................................................................11
Connecting a Host with iSCSI...................................................................................................11
Setting Up the Switch, iSCSI Initiator, and iSCSI target ports....................................................11
Configuring Ubuntu for iSCSI...............................................................................................11
Installing iSCSI on Ubuntu..............................................................................................11
Setting Up iSCSI for Ubuntu............................................................................................12
Configuring Ubuntu iSCSI Settings with Device-mapper Multipathing....................................13
Starting the iSCSI Daemon for Ubuntu..............................................................................15
Creating the iSCSI Connection in Ubuntu Using the iscsiadm Command...............................15
Configuring CHAP for the iSCSI Host....................................................................................16
Setting the Host CHAP Authentication on the HP 3PAR StoreServ Storage.............................16
Setting iSCSI CHAP on the Ubuntu Host...........................................................................17
Setting Up the Bidirectional CHAP on the HP 3PAR StoreServ Storage..................................18
Setting Bidirectional CHAP on the Ubuntu Host.................................................................19
3 Allocating Storage for Access by the Ubuntu Host.........................................21
Creating Storage on the HP 3PAR StoreServ Storage...................................................................21
Creating Virtual Volumes....................................................................................................21
Creating Thinly-provisioned Virtual Volumes...........................................................................21
Thin Deduplication.............................................................................................................21
Exporting LUNs to the Host......................................................................................................22
Restrictions on Volume Size and Number...................................................................................23
Discovering New Devices/New Partitioned Devices without rebooting...........................................23
Discovering Devices................................................................................................................24
Scan Methods for LUN Discovery.........................................................................................25
Method 1 - sysfs Scan....................................................................................................25
Method 2 - Adding Single Devices..................................................................................25
Verifying Devices Found by the Host.....................................................................................26
4 Modifying HP 3PAR Devices on the Host Server............................................28
Creating Device-mapper Devices..............................................................................................28
Displaying Detailed Device-mapper Node Information.................................................................29
Partitioning Device-mapper Nodes............................................................................................30
Removing a Storage Volume from the Host.................................................................................31
5 Known Issues and Examples.......................................................................33
Static IP address entered during Ubuntu installation (IP address, gateway, etc.) are missing..............33
BIOS is broken and requested that x2apic be disabled. (Applies to Gen 8 servers only)...................34
iSCSI sessions cannot login after the host restarts........................................................................35
The /tmp directory is cleared after the host restarts.....................................................................35
syslog drops messages due to rate limiting.................................................................................35
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