maximumwindowsnt

windowsnt  时间:2021-03-29  阅读:()
WindowsOSFileSystemsMS-DOSandWindows95/98/NT/2000/XPallowuseofFAT-16orFAT-32.
WindowsNT/2000/XPusesNTFS(NTFileSystem)FileAllocationTable(FAT)Notusedsomuch,butlookatasacontrasttootherlesystems.
DiskLayoutSeeoldTanenbaumFig8-18.
Bootsector|Partition1|Partion2|.
.
.
Eachpartitioncanbeadierentlesystem(includingUnix).
Eachpartitionislaidoutas:SecondaryBootSector|FAT|OptionalDuplicateFAT|Rootdirectory|Datablocks.
.
.
CS45131week2-windowsfs.
texFileAllocationTable(FAT)Haveatablewithoneentryforeachblockonthedisk.
Directoryentryforalecontainstherstblockinthele.
TheFATentryforthisblockthenpointstothenextblockofthele.
UseEOFmarkforlastblock.
Blankentriesindicatefreeblocks(noneedforfreeblocklist).
Example(alsoseeoldTanenbaumFig8-19):BlockEntry0Bootsector1Bootsector23374Free5EOF610758Free9Bad10EOFThebootsectorcontainsbootinstructionsanddescriptiveinfolike:sizeofdisksector,numberofphysicalsectorsondiskperblock,sizeofrootdirectory.
Badentryindicatesblockisnotusable.
With16-bitblockshaveamaximumof216=64Kblocks.
Tousea2GBdiskonewouldneed32K-byteblocks(verylarge).
Canresultininternalfragmentationforsmallles.
FAT-32uses32-bitblocknumberssupporting4GBofblocknumbersanddisksupto2Terabytesinsize.
CS45132week2-windowsfs.
texFAT-16DirectoryEntryEachdirectoryentryis32bytes:FileName(8bytes)Extension(3bytes)Attributes(1byte)Reserved(10bytes)Time(2bytes)Date(2bytes)Blocknumberofrstleblock(2bytes)Filesizeinbytes(4bytes)Attributes(one-biteach):R:ReadOnlyA:Archive(setwhenlemodied,clearedwhenbackedup)S:SystemFile(lecannotbedeletedbythedelcommand)H:HiddenFile(leisnotlistedwithdircommand)D:DirectoryV:VolumeLabelNote:FATanddirectoryentrybothkeeptrackofhowmanyblocksinale—couldbeinconsistency.
FAT(versusUnix)keepsallinformationaboutaleinthedirectoryentryratherthananinode.
CS45133week2-windowsfs.
texFAT-32FileSystemBlocknumbersare32-bitslong.
FATitselfbecomeslargerandtwoofthereservedbytesindirectoryentryareusedtoextendblocknumberto4bytes.
FAT-32alsoabolishedtherestrictiononthesizeoftherootdirectory—therootdirectoryisnolongerstoredinaxedposition.
LikeFAT-16,hasnoaccessprotectionforles.
LongFileNamesVFAT(virtualleallocationtable)isusedinWindows95/98tohandlelonglenames.
UseareservedareaofVFATforlonglenameswithaninvalidcombinationofattributebitsindirectoryentries.
CS45134week2-windowsfs.
texNT/2000/XPFileSystem(NTFS)FileSystemAPICallsLookatTanenbaumFigures11-31and11-33—similartoUnix/Linux.
OrganizationFundamentalentityinNTFSisavolume.
LikeapartitioninFAT,butoccupypart,allormultipledisks.
Usesclusters(basicallysameasablock)astheunitofdiskallocation.
Aclusterconsistsofoneormorephysicalsectorsonthedisk.
Theyarenumberedbynumberscalledlogicalclusternumbers(LCNs).
InformationaboutNTFSlesstoredasattributes:lename(namesiftherearealiases),creationtime,securitydescriptor,unnameddataattribute(contentsofthele).
MasterFileTable(MFT)Speciallecontainingoneentryforeachleinavolume.
MFTentrycanbefrom1KBto4KB.
InfocontainedinanMFTentryaboutale:standardinfosuchastimestamps,lesizele'snameinUnicode(16-bitchars)andalsoan8.
3DOS-stylenamesecurityinfodataforthele.
IfasmalllethisattributecanbestoredintheMFTentry(residentattributevs.
non-residentattribute).
MoredetailsifleislargerinkeepingtrackofwhichLCNsareused.
SeeFig11-35forallattributesthatcanappearinMFTrecords.
Attributesareaccessedusingle-name:attributesyntax.
CS45135week2-windowsfs.
texDirectoryThecontentsofadirectoryarestoredasaleandcontainanindextothelesinthisdirectory.
TheindexisstoredasaB+treeforfastlookupoflenames.
Eachleentrystoresthelename,thenumberofitsMFTentry,itstimestampandlesize.
LattertwovaluesareduplicatedfromleMFTentryforfasterdirectorylistings.
NTFSVolumeMetadataNTFSvolumemetadataisstoredinles:MFTitselfcopyoftheMFTLoglerecordsallmetadatatransactionstoallowrecoveryfromcrashesattribute-denitiontableindicatingwhichattributetypesareusedinthevolumeandwhatoperationscanbeperformedonthem.
RootdirectoryBitmaptoshowwhichclustersareallocatedBootle(tobootthesystem)Badclusterle(clusterstoavoid)(TanenbaumFig.
11-34)OtherNTFSsupportstransparentlecompression.
Supportsleencryptionwithpublic-keyencryptionSupportsdierentRAIDlevels.
CS45136week2-windowsfs.
tex

QQ防红跳转短网址生成网站源码(91she完整源码)

使用此源码可以生成QQ自动跳转到浏览器的短链接,无视QQ报毒,任意网址均可生成。新版特色:全新界面,网站背景图采用Bing随机壁纸支持生成多种短链接兼容电脑和手机页面生成网址记录功能,域名黑名单功能网站后台可管理数据安装说明:由于此版本增加了记录和黑名单功能,所以用到了数据库。安装方法为修改config.php里面的数据库信息,导入install.sql到数据库。...

Virmach 3.23美元可用6个月的VPS主机

Virmach 商家算是比较久且一直在低价便宜VPS方案中玩的不亦乐乎的商家,有很多同时期的商家纷纷关闭转让,也有的转型到中高端用户。而前一段时间也有分享过一次Virmach商家推出所谓的一次性便宜VPS主机,比如很低的价格半年时间,时间到服务器也就关闭。这不今天又看到商家有提供这样的产品。这次的活动产品包括圣何塞和水牛城两个机房,为期六个月,一次性付费用完将会取消,就这么特别的产品,适合短期玩玩...

Sharktech鲨鱼服务器商提供洛杉矶独立服务器促销 不限流量月99美元

Sharktech(鲨鱼服务器商)我们还是比较懂的,有提供独立服务器和高防服务器,而且性价比都还算是不错,而且我们看到有一些主机商的服务器也是走这个商家渠道分销的。这不看到鲨鱼服务器商家洛杉矶独立服务器纷纷促销,不限制流量的独立服务器起步99美元,这个还未曾有过。第一、鲨鱼机房服务器方案洛杉矶机房,默认1Gbps带宽,不限流量,自带5个IPv4,免费60Gbps / 48Mpps DDoS防御。C...

windowsnt为你推荐
酒店回应名媛拼单泰国酒店写错入住人姓名有影响吗?酒店回应名媛拼单酒店分房时出现单男单女时,怎样处理?美国互联网瘫痪美国网络大瘫痪到底是怎么发生的特朗普取消访问丹麦特朗普首次出访为什么选择梵蒂冈嘀动网在炫动网买鞋怎么样,是真的吗蒋存祺蒋存祺的主要事迹www.119mm.com看电影上什么网站??www.gegeshe.com《我的电台fm》 she网址是多少?www.baitu.com我看电影网www.5ken.com为什么百度就不上关键字呢www.vtigu.com如图所示的RT三角形ABC中,角B=90°(初三二次根式)30 如图所示的RT三角形ABC中,角B=90°,点p从点B开始沿BA边以1厘米每秒的速度向A移动;同时,点Q也从点B开始沿BC边以2厘米每秒的速度向点C移动。问:几秒后三角形PBQ的面积为35平方厘米?PQ的距离是多少
花生壳免费域名申请 三级域名网站 免费cn域名 ipage jsp主机 42u标准机柜尺寸 网通代理服务器 一元域名 建立邮箱 网站cdn加速 100m空间 metalink 购买国外空间 域名dns 视频服务器是什么 西安服务器托管 百度云加速 德隆中文网 华为云建站 金主 更多