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&nbsp;<BR>----------------------------------------------------------------------------&nbsp;<BR>&nbsp;<BR>6.14&nbsp;我&nbsp;如&nbsp;何&nbsp;测&nbsp;试&nbsp;我&nbsp;的&nbsp;CD-ROM&nbsp;是&nbsp;几&nbsp;倍&nbsp;速&nbsp;的&nbsp;呢&nbsp;?&nbsp;<BR>&nbsp;<BR>有&nbsp;一&nbsp;个&nbsp;办&nbsp;法&nbsp;,&nbsp;就&nbsp;是&nbsp;测&nbsp;试&nbsp;它&nbsp;要&nbsp;花&nbsp;多&nbsp;久&nbsp;读&nbsp;取&nbsp;1500K&nbsp;的&nbsp;资&nbsp;料:&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;%&nbsp;time&nbsp;-p&nbsp;dd&nbsp;if=/dev/cdrom&nbsp;of=/dev/null&nbsp;bs=1k&nbsp;count=1500&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1500+0&nbsp;records&nbsp;in&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1500+0&nbsp;records&nbsp;out&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;real&nbsp;5.24&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;user&nbsp;0.03&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sys&nbsp;5.07&nbsp;<BR>&nbsp;<BR>正&nbsp;常&nbsp;的&nbsp;单&nbsp;倍&nbsp;速&nbsp;CD-ROM&nbsp;每&nbsp;秒&nbsp;传&nbsp;送&nbsp;150KB,&nbsp;所&nbsp;以&nbsp;约&nbsp;要&nbsp;10&nbsp;秒&nbsp;钟.&nbsp;二&nbsp;倍&nbsp;速&nbsp;<BR>约&nbsp;要&nbsp;5&nbsp;秒&nbsp;钟&nbsp;,&nbsp;四&nbsp;倍&nbsp;速&nbsp;的&nbsp;约&nbsp;2.5&nbsp;秒&nbsp;钟&nbsp;等&nbsp;等...&nbsp;<BR>&nbsp;<BR>real&nbsp;时&nbsp;间&nbsp;也&nbsp;许&nbsp;是&nbsp;最&nbsp;好&nbsp;的&nbsp;值&nbsp;--&nbsp;在&nbsp;上&nbsp;面&nbsp;情&nbsp;形&nbsp;指&nbsp;出&nbsp;它&nbsp;是&nbsp;二&nbsp;倍&nbsp;速&nbsp;<BR>机&nbsp;器.&nbsp;你&nbsp;可&nbsp;以&nbsp;增&nbsp;加&nbsp;资&nbsp;料&nbsp;量&nbsp;得&nbsp;出&nbsp;更&nbsp;准&nbsp;确&nbsp;的&nbsp;值.&nbsp;(&nbsp;如&nbsp;果&nbsp;你&nbsp;担&nbsp;心&nbsp;受&nbsp;快&nbsp;<BR>取&nbsp;影&nbsp;响&nbsp;的&nbsp;话.)你&nbsp;也&nbsp;许&nbsp;应&nbsp;该&nbsp;多&nbsp;测&nbsp;几&nbsp;次,&nbsp;求&nbsp;平&nbsp;均&nbsp;值.&nbsp;<BR>&nbsp;<BR>6.15&nbsp;装&nbsp;好&nbsp;Linux&nbsp;後&nbsp;,&nbsp;我&nbsp;的&nbsp;CD-ROM&nbsp;不&nbsp;能&nbsp;用&nbsp;了&nbsp;<BR>&nbsp;<BR>最&nbsp;常&nbsp;见&nbsp;的&nbsp;症&nbsp;状&nbsp;是&nbsp;先&nbsp;用&nbsp;Linux&nbsp;安&nbsp;装&nbsp;时&nbsp;,&nbsp;Linux&nbsp;承&nbsp;认&nbsp;你&nbsp;的&nbsp;CD-ROM.&nbsp;但&nbsp;装&nbsp;<BR>完&nbsp;後&nbsp;,&nbsp;从&nbsp;软&nbsp;碟&nbsp;或&nbsp;硬&nbsp;碟&nbsp;开&nbsp;机&nbsp;却&nbsp;又&nbsp;不&nbsp;能&nbsp;用&nbsp;它&nbsp;了.&nbsp;<BR>&nbsp;<BR>最&nbsp;大&nbsp;的&nbsp;可&nbsp;能&nbsp;就&nbsp;是&nbsp;多&nbsp;数&nbsp;Linux&nbsp;套&nbsp;件&nbsp;中&nbsp;,&nbsp;装&nbsp;在&nbsp;硬&nbsp;碟&nbsp;的&nbsp;核&nbsp;心&nbsp;不&nbsp;一&nbsp;定&nbsp;就&nbsp;<BR>是&nbsp;和&nbsp;安&nbsp;装&nbsp;片&nbsp;用&nbsp;的&nbsp;一&nbsp;样.&nbsp;你&nbsp;选&nbsp;了&nbsp;支&nbsp;援&nbsp;你&nbsp;设&nbsp;备&nbsp;的&nbsp;安&nbsp;装&nbsp;片&nbsp;,&nbsp;它&nbsp;却&nbsp;给&nbsp;<BR>你&nbsp;在&nbsp;硬&nbsp;碟&nbsp;上&nbsp;装&nbsp;一&nbsp;个&nbsp;没&nbsp;有&nbsp;支&nbsp;援&nbsp;CD-ROM&nbsp;的&nbsp;&quot;通&nbsp;用&quot;&nbsp;核&nbsp;心.&nbsp;你&nbsp;可&nbsp;以&nbsp;照&nbsp;第&nbsp;<BR>四&nbsp;章&nbsp;所&nbsp;说&nbsp;的&nbsp;&quot;问&nbsp;题&nbsp;与&nbsp;解&nbsp;决&quot;&nbsp;去&nbsp;做.&nbsp;(从&nbsp;检&nbsp;查&nbsp;/proc/devices&nbsp;开&nbsp;始)&nbsp;<BR>&nbsp;<BR>解&nbsp;法&nbsp;是&nbsp;重&nbsp;编&nbsp;译&nbsp;核&nbsp;心&nbsp;,&nbsp;确&nbsp;定&nbsp;你&nbsp;需&nbsp;要&nbsp;的&nbsp;CD-ROM&nbsp;驱&nbsp;动&nbsp;程&nbsp;式&nbsp;及&nbsp;其&nbsp;它&nbsp;需&nbsp;<BR>要&nbsp;的&nbsp;部&nbsp;份&nbsp;(&nbsp;如&nbsp;SCSI&nbsp;卡&nbsp;,&nbsp;ISO-9660&nbsp;档&nbsp;案&nbsp;系&nbsp;统&nbsp;)&nbsp;都&nbsp;编&nbsp;进&nbsp;去&nbsp;了.&nbsp;如&nbsp;果&nbsp;你&nbsp;<BR>不&nbsp;知&nbsp;道&nbsp;怎&nbsp;麽&nbsp;做&nbsp;,&nbsp;看&nbsp;Kernel&nbsp;HOWTO&nbsp;<BR>&nbsp;<BR>如&nbsp;果&nbsp;你&nbsp;安&nbsp;装&nbsp;时&nbsp;用&nbsp;了&nbsp;命&nbsp;令&nbsp;列&nbsp;参&nbsp;数&nbsp;(如&quot;hdc=cdrom&quot;)&nbsp;你&nbsp;要&nbsp;把&nbsp;它&nbsp;加&nbsp;进&nbsp;开&nbsp;<BR>机&nbsp;载&nbsp;入&nbsp;程&nbsp;式&nbsp;的&nbsp;设&nbsp;定&nbsp;档&nbsp;中(&nbsp;通&nbsp;常&nbsp;是&nbsp;/etc/lilo.conf)&nbsp;<BR>&nbsp;<BR>6.16&nbsp;在&nbsp;CD&nbsp;上&nbsp;有&nbsp;隐&nbsp;藏&nbsp;档,&nbsp;我&nbsp;没&nbsp;办&nbsp;法&nbsp;读...&nbsp;<BR>&nbsp;<BR>有&nbsp;些&nbsp;CD&nbsp;的&nbsp;一&nbsp;些&nbsp;档&nbsp;案&nbsp;有&nbsp;设&nbsp;定&nbsp;隐&nbsp;藏&nbsp;位&nbsp;元.&nbsp;这&nbsp;些&nbsp;档&nbsp;案&nbsp;正&nbsp;常&nbsp;状&nbsp;态&nbsp;是&nbsp;看&nbsp;<BR>不&nbsp;到&nbsp;的.&nbsp;不&nbsp;过&nbsp;如&nbsp;果&nbsp;你&nbsp;挂&nbsp;上&nbsp;时&nbsp;用&nbsp;了&nbsp;&quot;unhide&quot;&nbsp;选&nbsp;项,&nbsp;那&nbsp;麽&nbsp;应&nbsp;该&nbsp;就&nbsp;可&nbsp;以&nbsp;<BR>读&nbsp;取&nbsp;了.(这&nbsp;个&nbsp;选&nbsp;项&nbsp;似&nbsp;乎&nbsp;没&nbsp;有&nbsp;文&nbsp;件&nbsp;记&nbsp;载&nbsp;过&nbsp;)&nbsp;<BR>&nbsp;<BR>6.17&nbsp;哪儿找得到CD-ROM&nbsp;API的文件资料?&nbsp;<BR>&nbsp;<BR>如果你想写自己的应用程式,&nbsp;诸如CD唱片播放程式等,&nbsp;你必须懂得Linux提供的&nbsp;应用程&nbsp;<BR>式介面(application&nbsp;programming&nbsp;interface,&nbsp;API)&nbsp;<BR>&nbsp;<BR>原本CD-ROM核心驱动程式都是用自定的ioctl以支援这类机器的功能.&nbsp;像&nbsp;<BR>/usr/include/linux/sbpcd.h&nbsp;这样的标头档就描述了这些.&nbsp;由於很多驱动程式都是由&nbsp;<BR>别的驱动程式发展而来,&nbsp;介面虽不完全相同,&nbsp;但类似之处颇多.&nbsp;<BR>&nbsp;<BR>最近,&nbsp;由David&nbsp;van&nbsp;Leeuwen(<A HREF="mailto:david@tm.tno.nl)">david@tm.tno.nl)</A>&nbsp;发起,&nbsp;建立一组CD-ROM用的共通&nbsp;API.&nbsp;<BR>这文件在/usr/src/linux/Documentation/cdrom/cdrom-standard.tex.&nbsp;已有几个核心&nbsp;<BR>驱动程式支援它了.&nbsp;我预计下一个主要版本核心&nbsp;(3.0?)&nbsp;里,&nbsp;所有&nbsp;CD-ROM驱动程式都&nbsp;<BR>会符合这API.&nbsp;<BR>&nbsp;<BR>我的书,&nbsp;Linux&nbsp;Multimedia&nbsp;Guide,&nbsp;也提到了如何写CD-ROM程式,&nbsp;特别是放音方面&nbsp;的.&nbsp;<BR>请看&quot;参考资料&quot;那节.&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>7.&nbsp;参考文献&nbsp;<BR>&nbsp;<BR>首&nbsp;先&nbsp;是&nbsp;我&nbsp;已&nbsp;提&nbsp;到&nbsp;过&nbsp;的&nbsp;README&nbsp;档.&nbsp;典&nbsp;型&nbsp;的&nbsp;位&nbsp;置&nbsp;在&nbsp;<BR>/usr/src/linux/Documentation/cdrom/里.&nbsp;它&nbsp;可&nbsp;算&nbsp;是&nbsp;有&nbsp;用&nbsp;资&nbsp;讯&nbsp;的&nbsp;宝&nbsp;山.&nbsp;<BR>&nbsp;<BR>底下的&nbsp;USENET&nbsp;FAQ&nbsp;定期在&nbsp;news.answers&nbsp;发出,并存放在如<A HREF="ftp://rtfm.mit.edu/的网">ftp://rtfm.mit.edu/的网</A>&nbsp;<BR>际网路&nbsp;档案库中.&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;alt.cd-rom&nbsp;FAQ&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;comp.periphs.scsi&nbsp;FAQ&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;Enhanced&nbsp;IDE/Fast-ATA/ATA-2&nbsp;FAQ&nbsp;<BR>&nbsp;<BR>一&nbsp;些&nbsp;其&nbsp;它&nbsp;Linux&nbsp;HOWTO&nbsp;也&nbsp;提&nbsp;供&nbsp;和&nbsp;CD-ROM&nbsp;相&nbsp;关&nbsp;的&nbsp;有&nbsp;用&nbsp;资&nbsp;讯:&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;SCSI&nbsp;HOWTO&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;Hardware&nbsp;Compatibility&nbsp;HOWTO&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;Sound&nbsp;HOWTO&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;Kernel&nbsp;HOWTO&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;Distribution&nbsp;HOWTO&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;CD&nbsp;Writing&nbsp;mini-HOWTO&nbsp;<BR>&nbsp;<BR>至&nbsp;少&nbsp;有&nbsp;好&nbsp;几&nbsp;家&nbsp;公&nbsp;司&nbsp;卖&nbsp;在&nbsp;CD-ROM&nbsp;上&nbsp;的&nbsp;Linux&nbsp;套&nbsp;件&nbsp;;&nbsp;多&nbsp;数&nbsp;在&nbsp;<BR>Distribution&nbsp;HOWTO&nbsp;里&nbsp;都&nbsp;有&nbsp;记&nbsp;载.&nbsp;<BR>&nbsp;<BR>以&nbsp;下&nbsp;是&nbsp;和&nbsp;CD-ROM&nbsp;有&nbsp;关&nbsp;的&nbsp;USENET&nbsp;网&nbsp;路&nbsp;新&nbsp;闻&nbsp;组:&nbsp;<BR>&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;comp.publish.cdrom.hardware&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;comp.publish.cdrom.multimedia&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;comp.publish.cdrom.software&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;comp.sys.ibm.pc.hardware.cd-rom&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;alt.cd-rom&nbsp;<BR>&nbsp;&nbsp;&nbsp;*&nbsp;alt.cd-rom.reviews&nbsp;<BR>&nbsp;<BR>comp.os.linux&nbsp;网&nbsp;路&nbsp;新&nbsp;闻&nbsp;组&nbsp;也&nbsp;是&nbsp;Linux&nbsp;相&nbsp;关&nbsp;资&nbsp;讯&nbsp;的&nbsp;好&nbsp;来&nbsp;源.&nbsp;<BR>&nbsp;<BR>在&nbsp;<A HREF="ftp://ftp.cdrom.com/pub/cdrom/">ftp://ftp.cdrom.com/pub/cdrom/</A>&nbsp;里&nbsp;有&nbsp;一&nbsp;大&nbsp;堆&nbsp;的&nbsp;CD-ROM&nbsp;资&nbsp;讯&nbsp;及&nbsp;软&nbsp;体.&nbsp;<BR>&nbsp;<BR>在&nbsp;<A HREF="ftp://rtfm.mit.edu/pub/usenet/news.answers/pc-hardware-faq/enhanced-IDE/">ftp://rtfm.mit.edu/pub/usenet/news.answers/pc-hardware-faq/enhanced-IDE/</A>&nbsp;<BR>以&nbsp;及&nbsp;<A HREF="http://www.seagate.com/techsuppt/faq/faqlist.html.">http://www.seagate.com/techsuppt/faq/faqlist.html.</A>&nbsp;可&nbsp;找&nbsp;到&nbsp;IDE&nbsp;及&nbsp;ATA&nbsp;<BR>设&nbsp;备&nbsp;的&nbsp;FAQ&nbsp;文&nbsp;件.&nbsp;<BR>&nbsp;<BR>制&nbsp;定&nbsp;IDE&nbsp;协&nbsp;定&nbsp;的&nbsp;Western&nbsp;Digital&nbsp;公&nbsp;司&nbsp;,&nbsp;在&nbsp;其&nbsp;FTP&nbsp;站&nbsp;也&nbsp;有&nbsp;关&nbsp;於&nbsp;IDE&nbsp;协&nbsp;<BR>定&nbsp;的&nbsp;文&nbsp;件&nbsp;,&nbsp;在:&nbsp;<A HREF="ftp://fission.dt.wdc.com/pub/standards/atapi">ftp://fission.dt.wdc.com/pub/standards/atapi</A>&nbsp;<BR>&nbsp;<BR>有&nbsp;一&nbsp;个&nbsp;关&nbsp;於&nbsp;多&nbsp;媒&nbsp;体&nbsp;的&nbsp;首&nbsp;页&nbsp;可&nbsp;在&nbsp;<A HREF="http://viswiz.gmd.de/MultimediaInfo/">http://viswiz.gmd.de/MultimediaInfo/</A>&nbsp;<BR>中&nbsp;找&nbsp;到.&nbsp;Creative&nbsp;Labs&nbsp;的&nbsp;首&nbsp;页&nbsp;在&nbsp;<A HREF="http://www.creaf.com/.">http://www.creaf.com/.</A>&nbsp;<BR>&nbsp;<BR>Linux&nbsp;文&nbsp;件&nbsp;计&nbsp;画&nbsp;(LDP)&nbsp;制&nbsp;作&nbsp;了&nbsp;好&nbsp;几&nbsp;本&nbsp;Linux&nbsp;的&nbsp;书&nbsp;,&nbsp;包&nbsp;括&nbsp;Linux&nbsp;<BR>Installation&nbsp;and&nbsp;Getting&nbsp;Started.&nbsp;这&nbsp;些&nbsp;可&nbsp;从&nbsp;主&nbsp;要&nbsp;的&nbsp;Linux&nbsp;FTP&nbsp;档&nbsp;案&nbsp;库&nbsp;免&nbsp;<BR>费&nbsp;取&nbsp;得&nbsp;,&nbsp;或&nbsp;是&nbsp;花&nbsp;钱&nbsp;买&nbsp;硬&nbsp;拷&nbsp;贝&nbsp;型&nbsp;式&nbsp;的&nbsp;文&nbsp;件.&nbsp;<BR>&nbsp;<BR>Linux软体大地图(LSM)&nbsp;是&nbsp;标&nbsp;定&nbsp;Linux&nbsp;软&nbsp;体&nbsp;的&nbsp;无&nbsp;价&nbsp;参&nbsp;考&nbsp;资&nbsp;料.&nbsp;LSM&nbsp;在&nbsp;很&nbsp;多&nbsp;<BR>FTP&nbsp;档&nbsp;案&nbsp;库&nbsp;,&nbsp;包&nbsp;括&nbsp;<A HREF="ftp://sunsite.unc.edu/pub/Linux/docs/LSM.gz/">ftp://sunsite.unc.edu/pub/Linux/docs/LSM.gz/</A>&nbsp;中.&nbsp;<BR>&nbsp;<BR>Linux&nbsp;通&nbsp;信&nbsp;论&nbsp;坛&nbsp;有&nbsp;几&nbsp;个&nbsp;不&nbsp;同&nbsp;主&nbsp;题&nbsp;的&nbsp;讨&nbsp;论&nbsp;频&nbsp;道.&nbsp;若&nbsp;想&nbsp;知&nbsp;道&nbsp;如&nbsp;何&nbsp;参&nbsp;<BR>加&nbsp;,&nbsp;寄&nbsp;一&nbsp;封&nbsp;内&nbsp;容&nbsp;为&nbsp;&quot;help&quot;&nbsp;的&nbsp;信&nbsp;到&nbsp;<A HREF="mailto:majordomo@vger.rutgers.edu">majordomo@vger.rutgers.edu</A>&nbsp;(注&nbsp;意:&nbsp;在&nbsp;<BR>写&nbsp;这&nbsp;篇&nbsp;时&nbsp;,&nbsp;这&nbsp;些&nbsp;信&nbsp;件&nbsp;讨&nbsp;论&nbsp;区&nbsp;正&nbsp;严&nbsp;重&nbsp;超&nbsp;载&nbsp;,&nbsp;现&nbsp;在&nbsp;还&nbsp;在&nbsp;找&nbsp;替&nbsp;代&nbsp;的&nbsp;<BR>机&nbsp;器.)&nbsp;<BR>&nbsp;<BR>最&nbsp;後&nbsp;呢&nbsp;,&nbsp;虽&nbsp;然&nbsp;有&nbsp;点&nbsp;无&nbsp;耻&nbsp;,&nbsp;不&nbsp;过&nbsp;还&nbsp;是&nbsp;容&nbsp;我&nbsp;在&nbsp;此&nbsp;打&nbsp;打&nbsp;小&nbsp;广&nbsp;告:&nbsp;如&nbsp;果&nbsp;<BR>你&nbsp;想&nbsp;学&nbsp;学&nbsp;更&nbsp;多&nbsp;关&nbsp;於&nbsp;在&nbsp;Linux&nbsp;下&nbsp;的&nbsp;多&nbsp;媒&nbsp;体&nbsp;(&nbsp;特&nbsp;别&nbsp;是&nbsp;关&nbsp;於&nbsp;CD-ROM&nbsp;及&nbsp;<BR>音&nbsp;效&nbsp;卡&nbsp;应&nbsp;用&nbsp;及&nbsp;程&nbsp;式&nbsp;设&nbsp;计&nbsp;的)&nbsp;,&nbsp;到&nbsp;书&nbsp;店&nbsp;找&nbsp;找&nbsp;我&nbsp;编&nbsp;著&nbsp;的&nbsp;Linux&nbsp;<BR>Multimedia&nbsp;Guide,ISBN&nbsp;1-56592-219-0,&nbsp;由&nbsp;O'Reilly&nbsp;and&nbsp;Associates&nbsp;公&nbsp;司&nbsp;出&nbsp;版.&nbsp;<BR>除&nbsp;了&nbsp;原&nbsp;始&nbsp;的&nbsp;英&nbsp;文&nbsp;版&nbsp;外,&nbsp;法&nbsp;文&nbsp;版&nbsp;和&nbsp;日&nbsp;文&nbsp;版&nbsp;也&nbsp;正&nbsp;付&nbsp;印&nbsp;中.&nbsp;若&nbsp;在&nbsp;北&nbsp;美&nbsp;<BR>洲,&nbsp;请&nbsp;电&nbsp;800-998-9938.&nbsp;或&nbsp;是&nbsp;光&nbsp;顾&nbsp;以&nbsp;下&nbsp;站&nbsp;台:&nbsp;<BR><A HREF="http://www.ora.com/catalog/multilinux/noframes.html或">http://www.ora.com/catalog/multilinux/noframes.html或</A>&nbsp;本&nbsp;人&nbsp;的&nbsp;网&nbsp;址&nbsp;<BR><A HREF="http://www.pobox.com/~tranter/">http://www.pobox.com/~tranter/</A>&nbsp;<BR>&nbsp;<BR>&nbsp;<BR>--&nbsp;<BR>	o=|====&gt;			<A HREF="mailto:yorkwu@ms4.hinet.net">yorkwu@ms4.hinet.net</A>&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>

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