文件列表:

sg3_utils-1.16-arm (0, 2006-01-23)
sg3_utils-1.16-arm\archive (0, 2005-11-07)
sg3_utils-1.16-arm\archive\isosize.8 (1512, 2004-05-08)
sg3_utils-1.16-arm\archive\isosize.c (6508, 2000-12-22)
sg3_utils-1.16-arm\archive\Makefile (1474, 2004-09-03)
sg3_utils-1.16-arm\archive\rescan-scsi-bus.sh (2783, 2004-05-08)
sg3_utils-1.16-arm\archive\scsi_devfs_scan.8 (1078, 2003-04-30)
sg3_utils-1.16-arm\archive\scsi_devfs_scan.c (11062, 2005-08-06)
sg3_utils-1.16-arm\archive\sg3_utils.spec113 (8954, 2005-03-13)
sg3_utils-1.16-arm\archive\sgq_dd.c (38166, 2005-08-06)
sg3_utils-1.16-arm\archive\sgq_dd.c.orig (35207, 2004-09-03)
sg3_utils-1.16-arm\archive\sgq_old_dd.c (26978, 2004-10-12)
sg3_utils-1.16-arm\archive\sgs_dd.c (29064, 2004-10-12)
sg3_utils-1.16-arm\archive\sg_bus_xfer.c (6880, 2005-08-06)
sg3_utils-1.16-arm\archive\sg_dd2048.c (19991, 2004-10-12)
sg3_utils-1.16-arm\archive\sg_dd512.c (19975, 2004-10-12)
sg3_utils-1.16-arm\archive\sg_dd_old.c (20533, 2004-10-12)
sg3_utils-1.16-arm\archive\sg_debug.c (2010, 2002-01-16)
sg3_utils-1.16-arm\archive\sg_hold.c (4294, 2001-03-23)
sg3_utils-1.16-arm\archive\sg_include.h (2030, 2004-08-09)
sg3_utils-1.16-arm\archive\sg_poll.c (10613, 2005-08-06)
sg3_utils-1.16-arm\archive\sg_simple0.c (3366, 2001-12-18)
sg3_utils-1.16-arm\audit.h (7389, 2005-11-08)
sg3_utils-1.16-arm\CHANGELOG (23004, 2005-08-10)
sg3_utils-1.16-arm\COVERAGE (2868, 2005-08-05)
sg3_utils-1.16-arm\CREDITS (2483, 2005-05-13)
sg3_utils-1.16-arm\debian (0, 2005-11-07)
sg3_utils-1.16-arm\debian\changelog (1766, 2005-08-10)
sg3_utils-1.16-arm\debian\control (3380, 2005-06-15)
sg3_utils-1.16-arm\debian\copyright (652, 2005-06-08)
sg3_utils-1.16-arm\debian\docs (44, 2005-06-08)
sg3_utils-1.16-arm\debian\libsgutils1-0-dev.dirs (27, 2005-06-08)
sg3_utils-1.16-arm\debian\libsgutils1-0-dev.install (73, 2005-06-08)
sg3_utils-1.16-arm\debian\libsgutils1-0.dirs (9, 2005-06-08)
sg3_utils-1.16-arm\debian\libsgutils1-0.install (16, 2005-06-08)
sg3_utils-1.16-arm\debian\rules (1821, 2005-06-08)
sg3_utils-1.16-arm\debian\sg3-utils.dirs (9, 2005-06-08)
sg3_utils-1.16-arm\debian\sg3-utils.examples (21, 2005-06-08)
sg3_utils-1.16-arm\debian\sg3-utils.install (33, 2005-06-08)
... ...

README for sg3_utils ==================== Introduction ============ This package contains utilities for the Linux SCSI subsystem. In the Linux 2.6 kernel series almost all of these programs will work on any devices that use the SCSI command set. Apart from SCSI parallel devices, ATAPI devices (CD/DVDs and tapes), USB mass storage devices, Fibre Channel disks and IEEE 1394 storage devices (that use the "SBP" protocol) use the SCSI command set. Most utilities within the sg3_utils package work at the SCSI command level. For example the sg_inq utility issues a SCSI INQUIRY command and decodes the response. To view the relationship between the sg3_utils' utility and the main SCSI command(s) that it issues see the COVERAGE file. The only utilities that interface at a slightly higher level are sg_dd, sgm_dd and sgp_dd. These are closely related to the Unix dd command and typically issue a sequence of SCSI READ and WRITE commands to copy data. Description =========== A web site supporting the sg3_utils package, its predecessor sg_utils, and the Linux SCSI generic driver (and the scsi_debug driver) can be found at http://www.torque.net/sg . The most recent release version of sg3_utils and the most recent beta is on that page. There is also a page describing the utilities in the sg3_utils and sg_utils packages: http://www.torque.net/sg/u_index.html . A copy of the "u_index.html" file is in the "html" subdirectory. In the Linux 2.4 kernel series these utilities need to use the SCSI generic (sg) driver to access SCSI devices. The name of this package (i.e. sg3_utils) refers to version 3 of the SCSI generic (sg) driver which was introduced at the beginning of the 2.4 linux kernel series. Significantly this added a new SCSI command interface structure (i.e. struct sg_io_hdr) that is more flexible than the older "sg_header" structure found in the sg driver in the 2.2 and earlier linux kernel series. The sg_io_hdr structure is also more flexible than the awkward (and limiting) interface to the SCSI_IOCTL_SEND_COMMAND ioctl supported by the linux SCSI mid level. The version 3 sg driver also added the SG_IO ioctl that is synchronous (i.e. it issues the requested SCSI command and waits for the response (or a timeout) before the ioctl returns to the user space program that invoked it). The SG_IO ioctl is now supported in other parts of the linux kernel in the 2.6 series. Utilities that wish to use the asynchronous SCSI command interface (i.e. via a write() read() sequence) or issue special "commands" (e.g. bus and device resets) still need to use the sg driver. Note that various drivers (e.g. cdrom/sr) have different open() flag and permissions policies that the user may need to take into account. If you have problems or questions about them please contact the author. Documentation for the sg device driver can be found at: http://www.torque.net/sg/p/sg_v3_ho.html . This is written in DocBook and the original xml can be found in the same directory with the ".xml" extension. Postscript and pdf renderings are also in that directory. Older documentation for the sg version 3 driver can be found at: http://www.torque.net/sg/p/scsi_generic_v3.txt . All utilities are either "GPL"-ed or have a FreeBSD license. The intention is that users may incorporate all or part of the code in their work as they please. Attribution is encouraged. Please check the code as other contributors (apart from the author) may also have copyright notices. For a list of contributors see the CREDITS file. The "sg_lib.[hc]" files contain ASCII text corresponding to most of the SCSI commands, errors and warning conditions. The "sg_cmds.[hc]" files contains code to invoke common SCSI commands and associated response processing. Both are guided by recent drafts at www.t10.org which is the home site of SCSI (draft) standards. Since almost all of the utilities use these files, a shared library called "libsgutils.so" is built. Use of this library cuts down the size of the binary distributions of sg3_utils significantly. The "Makefile" provided in the main directory builds libsgutils.so and then builds each utility to use that shared library. Alternatively there is a script called "make_no_lib.sh" that will build utilities without depending on libsgutils.so . For example "./make_no_lib.sh sg_dd" builds a version of the sg_dd utility that does not depend on libsgutils.so . All the utilities in the main directory have "man" pages. Additional information (including a version number) can be found towards the top of each ".c" file corresponding to each utility. The sg driver in Linux can be seen as having 3 distinct versions: v1 lk < 2.2.6 sg_header based relatively unchanged since 1992 v2 lk >= 2.2.6 enhanced sg_header interface structure [1999/4/16] v3 lk >= 2.4 additional sg_io_hdr interface structure [2001/1/4] v3 lk >= 2.6 same interface as found in lk 2.4 [2004/1/??] This package is targeted as "v3" only. Another package called "sg_utils" is targeted at "v2" and to a lesser extent "v1". The "sg_utils" package has a subset of the utilities found in this package. Some sg ioctls (notably SG_IO) are defined for many block devices in lk 2.6 . In practice this means all SCSI block devices, ATAPI block devices (mainly CD and DVD players) but _not_ ATA disks (currently). SATA disks that use the libata kernel library accept SCSI commands and thus are supported. Support for the SG_IO as been added to the scsi tape driver (st) in lk 2.6.6 (and support for osst and ch (medium changer) may soon follow). No utilities in the main directory use the sg driver's older "sg_header" interface; instead they use the newer "sg_io_hdr" interface. The "sg_io_hdr" interface can be accessed two ways: - using the SG_IO ioctl [for synchronous access] - using a write()/read() sequence that convey instances of "sg_io_hdr" All utilities in the main directory that issue SCSI commands use the SG_IO ioctl except for sgp_dd. This is due to the asynchronous nature of sgp_dd. Note that sgp_dd does _not_ support the "blk_sgio" switch found in sg_dd. This is important since block devices often identify themselves (programmatically) as sg devices in lk 2.6 and it would cause serious damage to do a write() of the sg driver's "sg_io_hdr" meta data (i.e. disk corruption). Warning ======= Many devices use SCSI command sets over transport protocols not normally associated with SCSI (as defined at http://www.t10.org ). Some of these devices react poorly (e.g. lock up) when sent SCSI commands that they don't support. Even sending a supported SCSI command with a field set to an unexpected value can cause problems. For example, all "SCSI" devices must support the INQUIRY command which the SCSI-2 standard says should request a 36 byte response. However later SCSI standards (e.g. SPC-2) have increased that length but some SCSI devices lock up when they receive a request for anything other than a 36 byte response. Any well implemented "SCSI" device should react sensibly when a utility in sg3_utils sends a SCSI command that it doesn't support. Unfortunately this cannot be guaranteed. Utilities ========= Here is list in alphabetical order of utilities found in the main directory of the sg3_utils directory: - sginfo, sgm_dd, sgp_dd, sg_dd, sg_emc_trespass, sg_get_config, sg_format, sg_ident, sg_inq, sg_logs, sg_luns, sg_map, sg_modes, sg_opcodes, sg_persist, sg_prevent, sg_rbuf, sg_read, sg_readcap, sg_read_long, sg_reassign, sg_request, sg_reset, sg_rmsn, sg_rtpg, sg_scan, sg_senddiag, sg_ses, sg_start, sg_sync, sg_test_rwbuff, sg_turs, sg_verify, sg_write_long, sg_wr_mode These utilities and the libsgutils.so library which they depend on are built by the Makefile in the main directory. This Makefile does not invoke the Makefile's in the subdirectories. Each utility in the main directory has a "man" page in section 8 (system administration commands). Binary distributions of the sg3_utils package (e.g. "rpm" and debian packages) typically contains the shared library, the utilities in the main directory, their associated man pages and some documentation files (e.g. README, INSTALL, CREDITS and COVERAGE). See the INSTALL file for instructions about building and installing from a "tarball". Man pages can be read (without building and installing the package) by going to the main directory and executing something like this: $ man ./sg_dd.8 To see which SCSI commands (and ATA commands) are used by these utilities see the COVERAGE file. Here is a list in alphabetical order of utilities found in the archive subdirectory: - isosize, scsi_devfs_scan, sg_debug, sgq_dd Some of these utilities have man pages. Here is a list in alphabetical order of utilities found in the examples subdirectory: - scsi_inquiry, sg_simple1, sg_simple2, sg_simple3, sg_simple4, sg_simple16.c Also in that subdirectory is a script to test sg_persist, an example data file for sg_persist (called "transport_ids.txt") and an example data file for sg_reassign (called "reassign_addr.txt"). The "utils" subdirectory contains source and a Makefile to build "hxascdmp" which accepts binary data from stdin (or a file on the command line) and outputs an ASCII-HEX and ASCII representation of it. It is similar to the Unix od command. The "html" subdirectory contains copies of web pages relevant to the sg3_utils package. Currently it contains: - u_index.html : a description of the sg3_utils package contents - sg_dd.html : describes the sg_dd utility and compares it with the Unix dd command Notes for utilities without man pages ===================================== The "scsi_inquiry" program shows the use of the SCSI_IOCTL_SEND_COMMAND ioctl to send a SCSI INQUIRY command. That ioctl() is supported by the SCSI sub system mid level and so is common to all sd, sr, st and sg devices. This program has been placed in the "examples" subdirectory. "sgq_dd" is yet another variant of dd found in the archive directory. From the user's point of view it is very similar to sgp_dd but uses a non-blocking state machine rather then POSIX threads for parallelism. "sg_debug" is effectively defunct now. The user can instead do: $ cat /proc/scsi/sg/debug . This command has been placed in the archive directory. "sg_simple1" and "sg_simple2" are simple example programs demonstrating calls to the SCSI INQUIRY and TEST UNIT READY commands. They only differ in their error processing: sg_simple1 uses sg_lib.[hc] for error processing while sg_simple2 does its own more primitive checks. "sg_simple3" tests out user space scatter gather added to the version 3 sg driver. "sg_simple4" shows the INQUIRY command using mmap-ed IO to obtain its response buffer. "sg_simple16" attempts to send a 16 byte SCSI command, READ_16, to the scsi device. This is only supported for lk >= 2.4.15 and for adapter drivers that indicate that they have 16 byte CDB capability (otherwise DID_ABORT will appear in the host_status). Header file problems ==================== These utilities include 2 special Linux header files: #include #include These files are typically found in the directory /usr/include/scsi which is maintained by the GNU glibc team. Unfortunately these GNU supplied headers may not be (functionally) the same as those found in the kernel source: /usr/src/linux/include/scsi/sg.h and /usr/src/linux/include/scsi/scsi.h If glibc and the kernel on a machine are of the same vintage then it is probably sufficient to use the simple includes listed at the start of this section. Another technique that used to work was to rely on /usr/include/linux being a symbolic link to /usr/src/linux/include/linux . That caused the following: #include #include to find the kernel supplied header files. However recent versions of glibc have removed this symlink. Hence this technique is no longer recommended. The include file path issues are now all addressed in one file called "sg_include.h". Please read that file. This fetching of the scsi.h and sg.h header files has not been a problem in the latter lk 2.4 and lk 2.6 series. scsirastools ============ This package found at http://scsirastools.sourceforge.net contains utilities which overlap with the functionality offered in sg3_utils. Utilities of note in scsirastools are: - sgdskfl: for loading firmware into SCSI disks - sgmode: get and set mode pages - sgdefects: list primary and grown defect lists - sgdiag to perform format and other test functions plscsi ====== This is a utility which can issue arbitrary SCSI commands (i.e. supplied by user). It is available for Linux and other operating systems. See http://members.aol.com/plscsi . Doug Gilbert 10th August 2005

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