diff --git a/www/scst_page.html b/www/scst_page.html new file mode 100644 index 000000000..0c73c9943 --- /dev/null +++ b/www/scst_page.html @@ -0,0 +1,246 @@ + + + + + SCST: Generic SCSI Target Middle Level for Linux + + + + SourceForge.net Logo +

Generic SCSI Target Middle Level for Linux
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+

The SCSI target mid-level subsystem for +Linux (SCST) is a new subsystem of the Linux kernel that provides a +standard framework for SCSI target drivers development. It is designed +to +provide unified, consistent interface between SCSI target drivers and +Linux kernel and simplify target drivers development as much as +possible. A system with a SCSI target device is able to share its local +or virtual devices with other systems on a network with SCSI protocol +support, e.g. SCSI bus, Fibre Channel, TCP/IP with iSCSI. This is +commonly used for data storage virtualization.
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SCST has the following features:

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Interoperability between SCST and local +SCSI initiators (like sd, st) is +the additional issue that SCST is going to address (it is not +implemented yet). It is necessary, because local SCSI initiators can +change the state of the device, for example RESERVE the device, or some +of its parameters and that would be done behind SCST, which could lead +to various problems. Thus, RESERVE/RELEASE commands, locally generated +UNIT ATTENTIONs, etc. should be intercepted and processed as if local +SCSI initiators act as remote SCSI initiators connected to SCST. This +feature requires some the kernel modification. Since in the current +version it is not implemented, SCST and target drivers are +able to work with any 2.4 or 2.6 kernel version.
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Interface between SCST and target +drivers is based on work, done by University +of New Hampshire Interoperability Labs (UNH IOL) for the UNH-iSCSI +project, which is currently developed on SourceForge.net.
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The latest stable version is 0.9.4. It +supports SCSI disks (type 0), tapes (type 1), processors (type +3), CDROMs (type 5), MO disks (type 7), medium changers (type 8) and +RAID controllers (type 0xC). Also it supports FILEIO and "performance" +device handlers. FILEIO device handler allows to use files on file +systems or block devices as virtual remotely available SCSI disks or +CDROM's. "Performance" device handlers provide a way for direct +performance measurements without overhead of actual data transferring +from/to underlying SCSI device. Requires Linux kernel 2.6.14 or higher. +Tested on i386 and x86_64 only, +but should also +work on any other +supported by Linux platform. More detail information you could find in +the project README file.
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Starting from version 0.9.4 2.4 Linux +kernels are not supported anymore, although there could be new SCST +releases those kernels with very important bug fixes. The latest stable +version of SCST with 2.4 kernels support is 0.9.3.1-24.

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If you have any questions you can ask +them on the SCST SF.net page either using forum, or scst-devel mailing +list.
+

+Download
+SCST SF.net project +page
+Change Log
+Documentation: HTML, PDF
+

The latest development versions of SCST and its drivers are +available directly from the +project's SVN. You can access it using either web-based SVN +repository viewer or using anonymous access:

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svn co https://svn.sourceforge.net/svnroot/scst
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More information about accessing SVN repository may be found here.
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History of the pre-SVN SCST development is available in SCST CVS +repository, which is accessible using web-based CVS +repository viewer or anonymous CVS access.
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Target driver for Qlogic 2200/2300 cards for 2.6 kernels
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This is ported version of the +previous target driver for 2.4 kernels (see below) to the in-tree 2.6 +Qlogic 2x00 initiator +driver. The port was done by Nathaniel Clark. This is stable and +functional driver with +the larger feature set, than the parent driver has.

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The latest version is 0.9.3.8. Requires +Linux kernel version 2.6.15.X and SCST version 0.9.4 or higher. +For usage with other kernel versions you will need to port the +initiator patch to that version of the kernel.
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You can find the latest development +version of this driver in the SCST CVS. See above how to setup access +to it.
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+

Download
+Change Log
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Target driver for Qlogic 2200/2300 cards
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+
Target driver for Qlogic 2200/2300 +cards has all required features and +looks to be quite stable. It is designed to work in conjunction with +the initiator +driver, which is intended to perform all the initialization and +shutdown tasks. In the current release as a base for the initiator +driver was taken Red Hat's driver from the stock 2.4.20 kernel. Then it +was patched, basically, to enable the target mode and provide all +necessary callbacks, and it's still able to work as initiator only. +Mode, when a host acts as the initiator and the target simultaneously, +is also supported. This driver is going to be obsolete soon in favor of +2.6-based driver (see above).
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+The latest version is 0.9.3.4. Requires Linux kernel versions 2.4.20 or +higher and SCST version 0.9.3-pre4 or higher. If you are lucky, it +works also on 2.6 kernels, see README file +for details. Tested on i386 only, but +should work on any other supported by Linux platform.
+
+
+Download
+Change Log +

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Target drivers for Adaptec 7xxx, LSI/MPT and Qlogic QLA12xx +cards

+Target drivers for Adaptec 7xxx, LSI/MPT and Qlogic QLA12xx cards have +being developed by Hu Gang and they available for download from http://bj.soulinfo.com/~hugang/scst/tgt/. +These drivers are not completed, but looks to be a good starting point +if you are going to use one of these cards. +SCST team don't have the appropriate hardware, therefore have not +tested and don't support these drivers. Send all questions to Hu Gang +<hugang +% soulinfo.com>. If some of these drivers don't compile for you, try +again with SCST version 0.9.3-pre2.
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+Download
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Patches for UNH-iSCSI Target 1.5.03 and 1.6.00 to work over +SCST

+SCST is much more advanced, than the internal mid-level of UNH-iSCSI target +driver. +With SCST the iSCSI target benefits from all its features and gets +ability to use all its advantages, like high performance and +scalability, SMP support, required SCSI functionality emulation, etc.
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+Since the interface between SCST and the target drivers is based on +work, done by UNH IOL, it was relatively simple to update UNH-iSCSI +target to work over SCST. Mostly it was "search and replace" job. The +built-in scsi_target remains available as a compile-time option.
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+Requires Linux kernel versions 2.4.20 or +higher or 2.6.7 or higher and SCST version 0.9.2 or higher.
+
+Download
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