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<div style="font-size:162%; border:none; margin:0; padding:.1em; color:#000;">Welcome to {{LIO servername}},</div>
<div style="top:+0.2em; font-size:95%;">the standard Unified [[Target]] in Linux.</div>
<div id="articlecount" style="width:100%; text-align:center; font-size:85%;">[[Special:Statistics|{{NUMBEROFARTICLES}}]] articles, [[Special:Statistics|{{NUMBEROFVIEWS}}]] pageviews</div>
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* [[Targetcli]]
* [[Target]]
* [[RTS OS]]
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* [[Downloads]]
* [[Features]]
* [[Contributing]]
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* [[Support]]
* [[Ecosystem]]
* [[RisingTide Systems|RisingTide]]
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<!-- Summary -->
{{Main Page Subbox|#f2ddce|#bfafa3|Summary|
'''LIO''' ('''{{LIO servername}}''') is the standard open-source Unified [[Target]] in Linux. It supports all prevalent storage fabrics, including [[iSCSI]], [[Fibre Channel]] ([http://www.qlogic.com QLogic]), [[Fibre Channel over Ethernet|FCoE]], [[InfiniBand]]/[[SRP]] ([http://www.mellanox.com/ Mellanox]), FireWire / iEEE 1394, USB, etc. LIO has replaced [[STGT]] as the standard Target with Linux kernel version 2.6.38 in early 2011.

The LIO Unified Target has become the Linux iSCSI target of choice for many volume storage appliance vendors, including [http://www.buffalotech.com/ Buffalo], [http://www.netgear.com/ Netgear], [http://www.qnap.com/ QNAP], etc., allowing them to achieve [[VMware]] Ready certifications, including [[VMware vSphere|vSphere]]&nbsp;5 with VAAI. LIO includes [[targetcli]], a management shell and API for the Unified Target with a single namespace for all storage objects.

LIO and targetcli are developed by {{RTS full}}, a data storage systems and software company located in the Silicon Valley.
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<!-- Target -->
{{Main Page Subbox|#cef2e0|#a3bfb1|[[Target]]|'''Architecture'''
* High-performance, non-blocking, multithreaded architecture with SSE4.2 support.
* [[Target#CPUs|CPU architectures]]: x86, ia64, Alpha, [[PlayStation 3|Cell]], [[Platforms#Nintendo Gamecube|PPC]], [[TS-7800|ARM]], [[PlayStation 2|MIPS]], etc.
* [[targetcli#Download|Distributions]]: [[CentOS]], [[Debian]], [[Fedora]], [[openSUSE]], [[RHEL]], [[Scientific Linux]], SLES, [[Ubuntu]]
* [[Platforms]]: PC architecture, Sony [[PlayStation 2|PS2]]/[[PlayStation 3|PS3]], [[Platforms#Raspberry Pi|Raspberry Pi]], Technologic [[TS-7800]]
* No single point of failure within either logical or physical connections

'''Advanced [[SCSI]] feature set'''
* Persistent Reservations ([[Persistent Reservations|PRs]])
* Asymmetric Logical Unit Assignment ([[Asymmetric Logical Unit Assignment|ALUA]])
* Protocol multiplexing, load-balancing and failover ([[Multiple Connections per Session|MC/S]])
* Full Error Recovery ([[Error Recovery Level|ERL]]&#61;0,1,2)
* Active/active task migration and session continuation ([[Error Recovery Level#2|ERL&#61;2]])
* Thin [[News#LUN provisioning|LUN provisioning]] (TRIM)

'''[[Target#Fabric modules|Multiprotocol target]]'''
* [[Fibre Channel]] - [http://www.qlogic.com QLogic]: released
* [[Fibre Channel over Ethernet]] (FCoE): released
* FireWire / iEEE 1394: released
* [[iSCSI]] (SCSI over IP): released
* [[IBM vSCSI]] for [http://www-03.ibm.com/systems/p/ IBM System p]: RC
* [[InfiniBand]] - [http://www.mellanox.com Mellanox]: released
* [[tcm_loop]] [[SCSI]] virtualization: released
* USB Gadget: released
* vHost with QEMU virtio and virtio-scsi PV guests: RC

'''[[Target#Backstores|Storage media]] independence'''
* Virtualization of all storage media; transparent mapping of I/O to LUNs
* No hard limits on number of LUNs per Target; maximum LUN size &#190;PB
* [[Target#Backstores|Backstores]]: [[IBLOCK|SATA]], [[PSCSI|SAS]], [[PSCSI|SCSI]], [[IBLOCK|BluRay]], [[IBLOCK|DVD]], [[IBLOCK|FLASH]], [[IBLOCK|USB]], [[RAMDISK|ramdisk]], etc.
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<!-- Compatibility and certifications -->
{{Main Page Subbox|#cef2e0|#a3bfb1|Compatibility and certifications|LIO is compatible to Initiators of the following operating systems:

* Microsoft: Windows Server 2003/2008/R2 and Windows XP/Vista/7
* Apple [[Mac OS X]] (via third-party initiator)
* Linux: [[RHEL]]&nbsp;4/5/6, SLES&nbsp;10.3/11, [[CentOS]], [[Debian]], [[Fedora]], [[openSUSE]], [[Ubuntu]]
* Unix: Solaris&nbsp;10, OpenSolaris, HP-UX
* VMs: [[VMware&nbsp;vSphere|vSphere]]&nbsp;5 (incl. VAAI), Red&nbsp;Hat [[Kernel-based Virtual Machine|KVM]], Microsoft Hyper-V, Oracle xVM/VirtualBox, Xen

LIO enabled [[VMware]] Ready certifications (incl. [[VMware vSphere|vSphere]]&nbsp;5 with VAAI) with [http://www.buffalotech.com/ Buffalo] and others. It also passes the Microsoft [http://en.wikipedia.org/wiki/Windows_Server_2008 Windows Server 2008] / [http://en.wikipedia.org/wiki/Windows_Server_2008_R2 R2] [http://en.wikipedia.org/wiki/High-availability_cluster Failover Cluster] compatibility test suites.
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<!-- targetcli -->
{{Main Page Subbox|#cedff2|#a3b0bf|[[Targetcli]]|[[targetcli]] provides the fabric agnostic single-node management shell for LIO Unified Targets. targetcli aggregates and presents all SAN functionality via the RTSlib library and API [[http://www.risingtidesystems.com/doc/rtslib-gpl/html HTML]][[http://www.risingtidesystems.com/doc/rtslib-gpl/pdf/rtslib-API-reference.pdf PDF]] to the Unified Target. 
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<!-- RTS OS -->
{{Main Page Subbox|#cedff2|#a3b0bf|[[RTS OS]]|[[RTS OS]] integrates the Unified [[Target]] and [[targetcli]] into a single-node Unified Storage operating system ([http://www.risingtidesystems.com/doc/RTS%20OS%20Admin%20Manual%20CE.pdf Admin Manual]). RTS OS supports [[VMware]] Ready certification, including [[VMware vSphere]]&nbsp;5 with VAAI.

An [[RTS OS#Subscription|RTS OS subscription]] provides access to additional RTS OS packages and update services.

RTS OS is currently being extended into RTS Live, a cluster storage operating system that is based on [[RTS Director]].
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<!-- High availability -->
{{Main Page Subbox|#cedff2|#a3b0bf|[[Network RAID1|High availability]] and clustering|LIO is designed from gound up to support highly available and cluster storage:
* Deeply embedded high availability ([[Network RAID1]])
* Scale-out clusters and disaster recovery solutions
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<!-- Initiator -->
{{Main Page Subbox|#cedff2|#a3b0bf|[[Core-iSCSI|Initiator]]|The [[Core-iSCSI]] Initiator is a high-end iSCSI Initiator that resolves a number of known issues with the [[Open-iSCSI]] standard Linux Initiator.

Core-iSCSI is available on Linux and Windows, and it has been ported to a wide range of [[platforms]] and devices, including:

* Linksys [[OpenWRT]] (MIPS)
* [[Motorola ROKR E2]] cell phone (XScale)
* [[Neuros OSD]] Set-top-box (ARM9)
* [[Nokia 770]] and [[Nokia N800]] Internet Tablets (ARM9 and Cortex)
* [[OpenMoko#Neo1973|OpenMoko Neo1973]] and [[OpenMoko#Neo FreeRunner|OpenMoko Neo FreeRunner]] cell phones (ARM)

{{RTS full}} ported [[OCFS2]] onto the Nokia Internet Tablets on top of the Core-iSCSI Initiator.
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<!-- RTS Director -->
{{Main Page Subbox|#cedff2|#a3b0bf|[[RTS Director]]|[[RTS Director]] is a distributed, highly-available cluster management framework. It comprises a shell, active library and API. The active library and API provide an extensible platform with a unified namespace to manage complex functionality, such as high-availability and cluster striping. The shell offers location-transparent access to all objects in the SAN. New functionality and devices can be added via plugin-modules.

RTS Director provides zero configuration. It is based on a symmetrically distributed architecture - there is no single point of failure, no cluster controller, no central database, etc. Nodes running the RTS Director automatically discover and join the cluster when coming up ([http://www.youtube.com/watch?v&#61;zSyybHxuT68 demo video]).
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<!-- See also -->
{{Main Page Subbox|#e0e0e0|#a0a0a0|See also|[[Fibre Channel]] &#124; [[Fibre Channel over Ethernet|FCoE]] &#124; [[InfiniBand]] &#124; [[iSCSI]] &#124; [[iSCSI Extensions for RDMA|iSER]] &#124; [[Internet Storage Name Service|iSNS]] &#124; [[Internet Wide Area RDMA Protocol|iWARP]] &#124; [[RTS OS]] &#124; [[tcm_loop|SCSI virtualization]] &#124; [[Service Location Protocol|SLP]] &#124; [[SRP]] &#124; [[targetcli]] 
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