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

RackNerd:美国便宜VPS,洛杉矶DC-02/纽约/芝加哥机房,4TB月流量套餐16.55美元/年

racknerd怎么样?racknerd美国便宜vps又开启促销模式了,机房优秀,有洛杉矶DC-02、纽约、芝加哥机房可选,最低配置4TB月流量套餐16.55美元/年,此外商家之前推出的最便宜的9.49美元/年套餐也补货上架,同时RackNerd美国AMD VPS套餐最低才14.18美元/年,是全网最便宜的AMD VPS套餐!RackNerd主要经营美国圣何塞、洛杉矶、达拉斯、芝加哥、亚特兰大、新...

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...

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...

windowsnt为你推荐
微盟赔付方案微盟都有哪些优势?今日油条油条晚上炸好定型明天可再复炸吗?同ip网站查询服务器禁PING 是不是就可以解决同IP网站查询问题关键字数据库:什么是关键字?百度关键词价格查询百度关键词排名价格是多少百度关键词分析怎样对关键词进行分析和选择抓站工具仿站必备软件有哪些工具?最好好用的仿站工具是那个几个?kb123.net连网方式:wap和net到底有什么不一样的www.493333.comwww.xiaonei.comwww.qqq147.comhttp://www.qq
宿迁服务器租用 免费注册网站域名 directadmin 好玩的桌面 免费网站申请 hostker 谁的qq空间最好看 免费申请网站 空间租赁 双线asp空间 上海电信测速 免费asp空间申请 服务器论坛 网站加速 privatetracker 标准机柜 pptpvpn screen 文件传输 56折扣网 更多