Changelog for ide cd¶
/* * 1.00 Oct 31, 1994 -- Initial version. * 1.01 Nov 2, 1994 -- Fixed problem with starting request in * cdrom_check_status. * 1.03 Nov 25, 1994 -- leaving unmask_intr[] as a user-setting (as for disks) * (from mlord) -- minor changes to cdrom_setup() * -- renamed ide_dev_s to ide_drive_t, enable irq on command * 2.00 Nov 27, 1994 -- Generalize packet command interface; * add audio ioctls. * 2.01 Dec 3, 1994 -- Rework packet command interface to handle devices * which send an interrupt when ready for a command. * 2.02 Dec 11, 1994 -- Cache the TOC in the driver. * Don't use SCMD_PLAYAUDIO_TI; it's not included * in the current version of ATAPI. * Try to use LBA instead of track or MSF addressing * when possible. * Don't wait for READY_STAT. * 2.03 Jan 10, 1995 -- Rewrite block read routines to handle block sizes * other than 2k and to move multiple sectors in a * single transaction. * 2.04 Apr 21, 1995 -- Add work-around for Creative Labs CD220E drives. * Thanks to Nick Saw <cwsaw@pts7.pts.mot.com> for * help in figuring this out. Ditto for Acer and * Aztech drives, which seem to have the same problem. * 2.04b May 30, 1995 -- Fix to match changes in ide.c version 3.16 -ml * 2.05 Jun 8, 1995 -- Don't attempt to retry after an illegal request * or data protect error. * Use HWIF and DEV_HWIF macros as in ide.c. * Always try to do a request_sense after * a failed command. * Include an option to give textual descriptions * of ATAPI errors. * Fix a bug in handling the sector cache which * showed up if the drive returned data in 512 byte * blocks (like Pioneer drives). Thanks to * Richard Hirst <srh@gpt.co.uk> for diagnosing this. * Properly supply the page number field in the * MODE_SELECT command. * PLAYAUDIO12 is broken on the Aztech; work around it. * 2.05x Aug 11, 1995 -- lots of data structure renaming/restructuring in ide.c * (my apologies to Scott, but now ide-cd.c is independent) * 3.00 Aug 22, 1995 -- Implement CDROMMULTISESSION ioctl. * Implement CDROMREADAUDIO ioctl (UNTESTED). * Use input_ide_data() and output_ide_data(). * Add door locking. * Fix usage count leak in cdrom_open, which happened * when a read-write mount was attempted. * Try to load the disk on open. * Implement CDROMEJECT_SW ioctl (off by default). * Read total cdrom capacity during open. * Rearrange logic in cdrom_decode_status. Issue * request sense commands for failed packet commands * from here instead of from cdrom_queue_packet_command. * Fix a race condition in retrieving error information. * Suppress printing normal unit attention errors and * some drive not ready errors. * Implement CDROMVOLREAD ioctl. * Implement CDROMREADMODE1/2 ioctls. * Fix race condition in setting up interrupt handlers * when the `serialize' option is used. * 3.01 Sep 2, 1995 -- Fix ordering of reenabling interrupts in * cdrom_queue_request. * Another try at using ide_[input,output]_data. * 3.02 Sep 16, 1995 -- Stick total disk capacity in partition table as well. * Make VERBOSE_IDE_CD_ERRORS dump failed command again. * Dump out more information for ILLEGAL REQUEST errs. * Fix handling of errors occurring before the * packet command is transferred. * Fix transfers with odd bytelengths. * 3.03 Oct 27, 1995 -- Some Creative drives have an id of just `CD'. * `DCI-2S10' drives are broken too. * 3.04 Nov 20, 1995 -- So are Vertos drives. * 3.05 Dec 1, 1995 -- Changes to go with overhaul of ide.c and ide-tape.c * 3.06 Dec 16, 1995 -- Add support needed for partitions. * More workarounds for Vertos bugs (based on patches * from Holger Dietze <dietze@aix520.informatik.uni-leipzig.de>). * Try to eliminate byteorder assumptions. * Use atapi_cdrom_subchnl struct definition. * Add STANDARD_ATAPI compilation option. * 3.07 Jan 29, 1996 -- More twiddling for broken drives: Sony 55D, * Vertos 300. * Add NO_DOOR_LOCKING configuration option. * Handle drive_cmd requests w/NULL args (for hdparm -t). * Work around sporadic Sony55e audio play problem. * 3.07a Feb 11, 1996 -- check drive->id for NULL before dereferencing, to fix * problem with "hde=cdrom" with no drive present. -ml * 3.08 Mar 6, 1996 -- More Vertos workarounds. * 3.09 Apr 5, 1996 -- Add CDROMCLOSETRAY ioctl. * Switch to using MSF addressing for audio commands. * Reformat to match kernel tabbing style. * Add CDROM_GET_UPC ioctl. * 3.10 Apr 10, 1996 -- Fix compilation error with STANDARD_ATAPI. * 3.11 Apr 29, 1996 -- Patch from Heiko Eißfeldt <heiko@colossus.escape.de> * to remove redundant verify_area calls. * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches * from Gerhard Zuber <zuber@berlin.snafu.de>. * Let open succeed even if there's no loaded disc. * 3.13 May 19, 1996 -- Fixes for changer code. * 3.14 May 29, 1996 -- Add work-around for Vertos 600. * (From Hennus Bergman <hennus@sky.ow.nl>.) * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers * from Ben Galliart <bgallia@luc.edu> with * special help from Jeff Lightfoot * <jeffml@pobox.com> * 3.15a July 9, 1996 -- Improved Sanyo 3 CD changer identification * 3.16 Jul 28, 1996 -- Fix from Gadi to reduce kernel stack usage for ioctl. * 3.17 Sep 17, 1996 -- Tweak audio reads for some drives. * Start changing CDROMLOADFROMSLOT to CDROM_SELECT_DISC. * 3.18 Oct 31, 1996 -- Added module and DMA support. * * 4.00 Nov 5, 1996 -- New ide-cd maintainer, * Erik B. Andersen <andersee@debian.org> * -- Newer Creative drives don't always set the error * register correctly. Make sure we see media changes * regardless. * -- Integrate with generic cdrom driver. * -- CDROMGETSPINDOWN and CDROMSETSPINDOWN ioctls, based on * a patch from Ciro Cattuto <>. * -- Call set_device_ro. * -- Implement CDROMMECHANISMSTATUS and CDROMSLOTTABLE * ioctls, based on patch by Erik Andersen * -- Add some probes of drive capability during setup. * * 4.01 Nov 11, 1996 -- Split into ide-cd.c and ide-cd.h * -- Removed CDROMMECHANISMSTATUS and CDROMSLOTTABLE * ioctls in favor of a generalized approach * using the generic cdrom driver. * -- Fully integrated with the 2.1.X kernel. * -- Other stuff that I forgot (lots of changes) * * 4.02 Dec 01, 1996 -- Applied patch from Gadi Oxman <gadio@netvision.net.il> * to fix the drive door locking problems. * * 4.03 Dec 04, 1996 -- Added DSC overlap support. * 4.04 Dec 29, 1996 -- Added CDROMREADRAW ioclt based on patch * by Ales Makarov (xmakarov@sun.felk.cvut.cz) * * 4.05 Nov 20, 1997 -- Modified to print more drive info on init * Minor other changes * Fix errors on CDROMSTOP (If you have a "Dolphin", * you must define IHAVEADOLPHIN) * Added identifier so new Sanyo CD-changer works * Better detection if door locking isn't supported * * 4.06 Dec 17, 1997 -- fixed endless "tray open" messages -ml * 4.07 Dec 17, 1997 -- fallback to set pc->stat on "tray open" * 4.08 Dec 18, 1997 -- spew less noise when tray is empty * -- fix speed display for ACER 24X, 18X * 4.09 Jan 04, 1998 -- fix handling of the last block so we return * an end of file instead of an I/O error (Gadi) * 4.10 Jan 24, 1998 -- fixed a bug so now changers can change to a new * slot when there is no disc in the current slot. * -- Fixed a memory leak where info->changer_info was * malloc'ed but never free'd when closing the device. * -- Cleaned up the global namespace a bit by making more * functions static that should already have been. * 4.11 Mar 12, 1998 -- Added support for the CDROM_SELECT_SPEED ioctl * based on a patch for 2.0.33 by Jelle Foks * <jelle@scintilla.utwente.nl>, a patch for 2.0.33 * by Toni Giorgino <toni@pcape2.pi.infn.it>, the SCSI * version, and my own efforts. -erik * -- Fixed a stupid bug which egcs was kind enough to * inform me of where "Illegal mode for this track" * was never returned due to a comparison on data * types of limited range. * 4.12 Mar 29, 1998 -- Fixed bug in CDROM_SELECT_SPEED so write speed is * now set ionly for CD-R and CD-RW drives. I had * removed this support because it produced errors. * It produced errors _only_ for non-writers. duh. * 4.13 May 05, 1998 -- Suppress useless "in progress of becoming ready" * messages, since this is not an error. * -- Change error messages to be const * -- Remove a "\t" which looks ugly in the syslogs * 4.14 July 17, 1998 -- Change to pointing to .ps version of ATAPI spec * since the .pdf version doesn't seem to work... * -- Updated the TODO list to something more current. * * 4.15 Aug 25, 1998 -- Updated ide-cd.h to respect machine endianness, * patch thanks to "Eddie C. Dost" <ecd@skynet.be> * * 4.50 Oct 19, 1998 -- New maintainers! * Jens Axboe <axboe@image.dk> * Chris Zwilling <chris@cloudnet.com> * * 4.51 Dec 23, 1998 -- Jens Axboe <axboe@image.dk> * - ide_cdrom_reset enabled since the ide subsystem * handles resets fine now. <axboe@image.dk> * - Transfer size fix for Samsung CD-ROMs, thanks to * "Ville Hallik" <ville.hallik@mail.ee>. * - other minor stuff. * * 4.52 Jan 19, 1999 -- Jens Axboe <axboe@image.dk> * - Detect DVD-ROM/RAM drives * * 4.53 Feb 22, 1999 - Include other model Samsung and one Goldstar * drive in transfer size limit. * - Fix the I/O error when doing eject without a medium * loaded on some drives. * - CDROMREADMODE2 is now implemented through * CDROMREADRAW, since many drives don't support * MODE2 (even though ATAPI 2.6 says they must). * - Added ignore parameter to ide-cd (as a module), eg * insmod ide-cd ignore='hda hdb' * Useful when using ide-cd in conjunction with * ide-scsi. TODO: non-modular way of doing the * same. * * 4.54 Aug 5, 1999 - Support for MMC2 class commands through the generic * packet interface to cdrom.c. * - Unified audio ioctl support, most of it. * - cleaned up various deprecated verify_area(). * - Added ide_cdrom_packet() as the interface for * the Uniform generic_packet(). * - bunch of other stuff, will fill in logs later. * - report 1 slot for non-changers, like the other * cd-rom drivers. don't report select disc for * non-changers as well. * - mask out audio playing, if the device can't do it. * * 4.55 Sep 1, 1999 - Eliminated the rest of the audio ioctls, except * for CDROMREADTOC[ENTRY|HEADER]. Some of the drivers * use this independently of the actual audio handling. * They will disappear later when I get the time to * do it cleanly. * - Minimize the TOC reading - only do it when we * know a media change has occurred. * - Moved all the CDROMREADx ioctls to the Uniform layer. * - Heiko Eißfeldt <heiko@colossus.escape.de> supplied * some fixes for CDI. * - CD-ROM leaving door locked fix from Andries * Brouwer <Andries.Brouwer@cwi.nl> * - Erik Andersen <andersen@xmission.com> unified * commands across the various drivers and how * sense errors are handled. * * 4.56 Sep 12, 1999 - Removed changer support - it is now in the * Uniform layer. * - Added partition based multisession handling. * - Mode sense and mode select moved to the * Uniform layer. * - Fixed a problem with WPI CDS-32X drive - it * failed the capabilities * * 4.57 Apr 7, 2000 - Fixed sense reporting. * - Fixed possible oops in ide_cdrom_get_last_session() * - Fix locking mania and make ide_cdrom_reset relock * - Stop spewing errors to log when magicdev polls with * TEST_UNIT_READY on some drives. * - Various fixes from Tobias Ringstrom: * tray if it was locked prior to the reset. * - cdrom_read_capacity returns one frame too little. * - Fix real capacity reporting. * * 4.58 May 1, 2000 - Clean up ACER50 stuff. * - Fix small problem with ide_cdrom_capacity * * 4.59 Aug 11, 2000 - Fix changer problem in cdrom_read_toc, we weren't * correctly sensing a disc change. * - Rearranged some code * - Use extended sense on drives that support it for * correctly reporting tray status -- from * Michael D Johnson <johnsom@orst.edu> * 4.60 Dec 17, 2003 - Add mt rainier support * - Bump timeout for packet commands, matches sr * - Odd stuff * 4.61 Jan 22, 2004 - support hardware sector sizes other than 2kB, * Pascal Schmidt <der.eremit@email.de> */
Changelog for ide floppy¶
/* * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive. * * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c. * Ver 0.2 Oct 31 96 Minor changes. * Ver 0.3 Dec 2 96 Fixed error recovery bug. * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl. * Ver 0.5 Feb 21 97 Add partitions support. * Use the minimum of the LBA and CHS capacities. * Avoid hwgroup->rq == NULL on the last irq. * Fix potential null dereferencing with DEBUG_LOG. * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds. * Add media write-protect detection. * Issue START command only if TEST UNIT READY fails. * Add work-around for IOMEGA ZIP revision 21.D. * Remove idefloppy_get_capabilities(). * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of * bytes requested on each interrupt to be zero. * Thanks to <shanos@es.co.nz> for pointing this out. * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> * Implement low level formatting. Reimplemented * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp * bit. My LS-120 drive barfs on * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. * Compromise by not reporting a failure to get this * mode page. Implemented four IOCTLs in order to * implement formatting. IOCTls begin with 0x4600, * 0x46 is 'F' as in Format. * Jan 9 01 Userland option to select format verify. * Added PC_SUPPRESS_ERROR flag - some idefloppy drives * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and * return a sense error. Suppress error reporting in * this particular case in order to avoid spurious * errors in syslog. The culprit is * idefloppy_get_capability_page(), so move it to * idefloppy_begin_format() so that it's not used * unless absolutely necessary. * If drive does not support format progress indication * monitor the dsc bit in the status register. * Also, O_NDELAY on open will allow the device to be * opened without a disk available. This can be used to * open an unformatted disk, or get the device capacity. * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by * <paul@paulbristow.net> * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this * driver. Included Powerbook internal zip kludge. * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive * no disk on insert and disk change now works * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere * Ver 0.95 Nov 7 00 Brought across to kernel 2.4 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0 * including set_bit patch from Rusty Russell * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to * fix a lost interrupt problem. It appears the busy * bit was being deasserted by my IOMEGA ATAPI ZIP 100 * drive before the drive was actually ready. * Ver 0.98a Oct 29 01 Expose delay value so we can play. * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code * to support new PocketZip drives */
Changelog for ide tape¶
/* * Ver 0.1 Nov 1 95 Pre-working code :-) * Ver 0.2 Nov 23 95 A short backup (few megabytes) and restore procedure * was successful ! (Using tar cvf ... on the block * device interface). * A longer backup resulted in major swapping, bad * overall Linux performance and eventually failed as * we received non serial read-ahead requests from the * buffer cache. * Ver 0.3 Nov 28 95 Long backups are now possible, thanks to the * character device interface. Linux's responsiveness * and performance doesn't seem to be much affected * from the background backup procedure. * Some general mtio.h magnetic tape operations are * now supported by our character device. As a result, * popular tape utilities are starting to work with * ide tapes :-) * The following configurations were tested: * 1. An IDE ATAPI TAPE shares the same interface * and irq with an IDE ATAPI CDROM. * 2. An IDE ATAPI TAPE shares the same interface * and irq with a normal IDE disk. * Both configurations seemed to work just fine ! * However, to be on the safe side, it is meanwhile * recommended to give the IDE TAPE its own interface * and irq. * The one thing which needs to be done here is to * add a "request postpone" feature to ide.c, * so that we won't have to wait for the tape to finish * performing a long media access (DSC) request (such * as a rewind) before we can access the other device * on the same interface. This effect doesn't disturb * normal operation most of the time because read/write * requests are relatively fast, and once we are * performing one tape r/w request, a lot of requests * from the other device can be queued and ide.c will * service all of them after this single tape request. * Ver 1.0 Dec 11 95 Integrated into Linux 1.3.46 development tree. * On each read / write request, we now ask the drive * if we can transfer a constant number of bytes * (a parameter of the drive) only to its buffers, * without causing actual media access. If we can't, * we just wait until we can by polling the DSC bit. * This ensures that while we are not transferring * more bytes than the constant referred to above, the * interrupt latency will not become too high and * we won't cause an interrupt timeout, as happened * occasionally in the previous version. * While polling for DSC, the current request is * postponed and ide.c is free to handle requests from * the other device. This is handled transparently to * ide.c. The hwgroup locking method which was used * in the previous version was removed. * Use of new general features which are provided by * ide.c for use with atapi devices. * (Programming done by Mark Lord) * Few potential bug fixes (Again, suggested by Mark) * Single character device data transfers are now * not limited in size, as they were before. * We are asking the tape about its recommended * transfer unit and send a larger data transfer * as several transfers of the above size. * For best results, use an integral number of this * basic unit (which is shown during driver * initialization). I will soon add an ioctl to get * this important parameter. * Our data transfer buffer is allocated on startup, * rather than before each data transfer. This should * ensure that we will indeed have a data buffer. * Ver 1.1 Dec 14 95 Fixed random problems which occurred when the tape * shared an interface with another device. * (poll_for_dsc was a complete mess). * Removed some old (non-active) code which had * to do with supporting buffer cache originated * requests. * The block device interface can now be opened, so * that general ide driver features like the unmask * interrupts flag can be selected with an ioctl. * This is the only use of the block device interface. * New fast pipelined operation mode (currently only on * writes). When using the pipelined mode, the * throughput can potentially reach the maximum * tape supported throughput, regardless of the * user backup program. On my tape drive, it sometimes * boosted performance by a factor of 2. Pipelined * mode is enabled by default, but since it has a few * downfalls as well, you may want to disable it. * A short explanation of the pipelined operation mode * is available below. * Ver 1.2 Jan 1 96 Eliminated pipelined mode race condition. * Added pipeline read mode. As a result, restores * are now as fast as backups. * Optimized shared interface behavior. The new behavior * typically results in better IDE bus efficiency and * higher tape throughput. * Pre-calculation of the expected read/write request * service time, based on the tape's parameters. In * the pipelined operation mode, this allows us to * adjust our polling frequency to a much lower value, * and thus to dramatically reduce our load on Linux, * without any decrease in performance. * Implemented additional mtio.h operations. * The recommended user block size is returned by * the MTIOCGET ioctl. * Additional minor changes. * Ver 1.3 Feb 9 96 Fixed pipelined read mode bug which prevented the * use of some block sizes during a restore procedure. * The character device interface will now present a * continuous view of the media - any mix of block sizes * during a backup/restore procedure is supported. The * driver will buffer the requests internally and * convert them to the tape's recommended transfer * unit, making performance almost independent of the * chosen user block size. * Some improvements in error recovery. * By cooperating with ide-dma.c, bus mastering DMA can * now sometimes be used with IDE tape drives as well. * Bus mastering DMA has the potential to dramatically * reduce the CPU's overhead when accessing the device, * and can be enabled by using hdparm -d1 on the tape's * block device interface. For more info, read the * comments in ide-dma.c. * Ver 1.4 Mar 13 96 Fixed serialize support. * Ver 1.5 Apr 12 96 Fixed shared interface operation, broken in 1.3.85. * Fixed pipelined read mode inefficiency. * Fixed nasty null dereferencing bug. * Ver 1.6 Aug 16 96 Fixed FPU usage in the driver. * Fixed end of media bug. * Ver 1.7 Sep 10 96 Minor changes for the CONNER CTT8000-A model. * Ver 1.8 Sep 26 96 Attempt to find a better balance between good * interactive response and high system throughput. * Ver 1.9 Nov 5 96 Automatically cross encountered filemarks rather * than requiring an explicit FSF command. * Abort pending requests at end of media. * MTTELL was sometimes returning incorrect results. * Return the real block size in the MTIOCGET ioctl. * Some error recovery bug fixes. * Ver 1.10 Nov 5 96 Major reorganization. * Reduced CPU overhead a bit by eliminating internal * bounce buffers. * Added module support. * Added multiple tape drives support. * Added partition support. * Rewrote DSC handling. * Some portability fixes. * Removed ide-tape.h. * Additional minor changes. * Ver 1.11 Dec 2 96 Bug fix in previous DSC timeout handling. * Use ide_stall_queue() for DSC overlap. * Use the maximum speed rather than the current speed * to compute the request service time. * Ver 1.12 Dec 7 97 Fix random memory overwriting and/or last block data * corruption, which could occur if the total number * of bytes written to the tape was not an integral * number of tape blocks. * Add support for INTERRUPT DRQ devices. * Ver 1.13 Jan 2 98 Add "speed == 0" work-around for HP COLORADO 5GB * Ver 1.14 Dec 30 98 Partial fixes for the Sony/AIWA tape drives. * Replace cli()/sti() with hwgroup spinlocks. * Ver 1.15 Mar 25 99 Fix SMP race condition by replacing hwgroup * spinlock with private per-tape spinlock. * Ver 1.16 Sep 1 99 Add OnStream tape support. * Abort read pipeline on EOD. * Wait for the tape to become ready in case it returns * "in the process of becoming ready" on open(). * Fix zero padding of the last written block in * case the tape block size is larger than PAGE_SIZE. * Decrease the default disconnection time to tn. * Ver 1.16e Oct 3 99 Minor fixes. * Ver 1.16e1 Oct 13 99 Patches by Arnold Niessen, * niessen@iae.nl / arnold.niessen@philips.com * GO-1) Undefined code in idetape_read_position * according to Gadi's email * AJN-1) Minor fix asc == 11 should be asc == 0x11 * in idetape_issue_packet_command (did effect * debugging output only) * AJN-2) Added more debugging output, and * added ide-tape: where missing. I would also * like to add tape->name where possible * AJN-3) Added different debug_level's * via /proc/ide/hdc/settings * "debug_level" determines amount of debugging output; * can be changed using /proc/ide/hdx/settings * 0 : almost no debugging output * 1 : 0+output errors only * 2 : 1+output all sensekey/asc * 3 : 2+follow all chrdev related procedures * 4 : 3+follow all procedures * 5 : 4+include pc_stack rq_stack info * 6 : 5+USE_COUNT updates * AJN-4) Fixed timeout for retension in idetape_queue_pc_tail * from 5 to 10 minutes * AJN-5) Changed maximum number of blocks to skip when * reading tapes with multiple consecutive write * errors from 100 to 1000 in idetape_get_logical_blk * Proposed changes to code: * 1) output "logical_blk_num" via /proc * 2) output "current_operation" via /proc * 3) Either solve or document the fact that `mt rewind' is * required after reading from /dev/nhtx to be * able to rmmod the idetape module; * Also, sometimes an application finishes but the * device remains `busy' for some time. Same cause ? * Proposed changes to release-notes: * 4) write a simple `quickstart' section in the * release notes; I volunteer if you don't want to * 5) include a pointer to video4linux in the doc * to stimulate video applications * 6) release notes lines 331 and 362: explain what happens * if the application data rate is higher than 1100 KB/s; * similar approach to lower-than-500 kB/s ? * 7) 6.6 Comparison; wouldn't it be better to allow different * strategies for read and write ? * Wouldn't it be better to control the tape buffer * contents instead of the bandwidth ? * 8) line 536: replace will by would (if I understand * this section correctly, a hypothetical and unwanted situation * is being described) * Ver 1.16f Dec 15 99 Change place of the secondary OnStream header frames. * Ver 1.17 Nov 2000 / Jan 2001 Marcel Mol, marcel@mesa.nl * - Add idetape_onstream_mode_sense_tape_parameter_page * function to get tape capacity in frames: tape->capacity. * - Add support for DI-50 drives( or any DI- drive). * - 'workaround' for read error/blank block around block 3000. * - Implement Early warning for end of media for Onstream. * - Cosmetic code changes for readability. * - Idetape_position_tape should not use SKIP bit during * Onstream read recovery. * - Add capacity, logical_blk_num and first/last_frame_position * to /proc/ide/hd?/settings. * - Module use count was gone in the Linux 2.4 driver. * Ver 1.17a Apr 2001 Willem Riede osst@riede.org * - Get drive's actual block size from mode sense block descriptor * - Limit size of pipeline * Ver 1.17b Oct 2002 Alan Stern <stern@rowland.harvard.edu> * Changed IDETAPE_MIN_PIPELINE_STAGES to 1 and actually used * it in the code! * Actually removed aborted stages in idetape_abort_pipeline * instead of just changing the command code. * Made the transfer byte count for Request Sense equal to the * actual length of the data transfer. * Changed handling of partial data transfers: they do not * cause DMA errors. * Moved initiation of DMA transfers to the correct place. * Removed reference to unallocated memory. * Made __idetape_discard_read_pipeline return the number of * sectors skipped, not the number of stages. * Replaced errant kfree() calls with __idetape_kfree_stage(). * Fixed off-by-one error in testing the pipeline length. * Fixed handling of filemarks in the read pipeline. * Small code optimization for MTBSF and MTBSFM ioctls. * Don't try to unlock the door during device close if is * already unlocked! * Cosmetic fixes to miscellaneous debugging output messages. * Set the minimum /proc/ide/hd?/settings values for "pipeline", * "pipeline_min", and "pipeline_max" to 1. */