《计算机导论》课程教学课件（英文讲稿）4-a- File mangement

File Mangement File Basic The rules for naming files Case Sensitive No Maximum lenght of file File name exetnsion name cannot exceed 255 characters Spaces allowed Yes Numbers allowed Yes Characters not allowed *|?10:<> File name not allowed Aux,Com1,Com2,Com4, (reserved word(保留字)for Con,Lpt1,Lpt2,Lpt3,Prn, windows) Nul

The rules for naming files File Mangement File Basic Case Sensitive No Maximum lenght of file name File name & exetnsion cannot exceed 255 characters Spaces allowed Yes Numbers allowed Yes Characters not allowed * | ? / “ : | File name not allowed (reserved word (保留字)for windows) Aux, Com1, Com2, Com4, Con, Lpt1, Lpt2, Lpt3, Prn, Nul

File Basic Partition: What is a disk partition? C:\D:\E:\ Is a partition neccessary? Directory: A lis t of files in operating system for each storage device. Main Directory: C: Path: Location of file is defined by a Path e.g.C:\MyMusic\Reggae|Marley One Love.mp3 File: File size,File date File formats (e.g.xIs,docx,ppt,pdf.etc)

File Basic

File Basic Vhat kind of file formats(文件格式)I can send to my friend? doc or docx,xls or xlsx,ppt or pptx. pdf(which software you need on your Computer) Convert(转换格式)： If you want to post the word document on the web. You have to convert the word document to HTML. Or convert bitmap(.bmp)to GIF or JPEG When you convert the DOC file to HTML the HTML page doesn't contain any of the page layout: Headers,footers,supscripts,pagenumbers,page breaks

What kind of file formats（文件格式） I can send to my friend? doc or docx, xls or xlsx, ppt or pptx. pdf (which software you need on your Computer) Convert（转换格式） : If you want to post the word document on the web. You have to convert the word document to HTML. Or convert bitmap(.bmp) to GIF or JPEG When you convert the DOC file to HTML the HTML page doesn’t contain any of the page layout: Headers, footers, supscripts, pagenumbers, page breaks. File Basic

File management: File management: An Application might also have file management capabilities, such as copying,deleting,and renaming. Word application.the students background about the word? Windows Mac provide file mangement utilities: Windows:Windows Explorer Mac:Finder F.M.Tips Page 218

File management: An Application might also have file management capabilities, such as copying, deleting, and renaming. Word application.the students background about the word? Windows & Mac provide file mangement utilities: Windows: Windows Explorer Mac: Finder F.M. Tips Page 218 File management:

File management: Physical file storage: Track Tracks Sector Cluster Sectors fg1.1 (c)helpwithpcs.com File system: Keep track of the name and location of files that reside on a storage medium,the file system maintain a list of clusters and keep track of which are empty and which hold data. e.g.HFS,Ext2fs,NTFS,FAT16,FAT32,and NTFS. File index: The above information stored in INDEX FILE. FAT32 file system >>index file called:File Allocation Table (FAT) NTFS file syatem >>index file called:Master File Table(MFT)

File management: Physical file storage: Tracks Sectors File system: Keep track of the name and location of files that reside on a storage medium, the file system maintain a list of clusters and keep track of which are empty and which hold data. e.g. HFS, Ext2fs, NTFS, FAT16, FAT32, and NTFS. File index: The above information stored in INDEX FILE. FAT32 file system >>> index file called: File Allocation Table (FAT) NTFS file syatem >>> index file called: Master File Table (MFT)

File management: Adjacent cluster: Afile doesn't fit into a single cluster spills over into the next contiguous(adjacent)cluster. Nonadjacent cluster: When the contiguous cluster not available the data wil be saved into noncontiguous cluster. This disk is fragmented disk Defragmented disk: To rerrange the files on a disk so that they stored in contiguous clustors

Adjacent cluster: Afile doesn’t fit into a single cluster spills over into the next contiguous( adjacent) cluster. Nonadjacent cluster: When the contiguous cluster not available the data wil be saved into noncontiguous cluster. This disk is fragmented disk Defragmented disk: To rerrange the files on a disk so that they stored in contiguous clustors. File management:

Backup Security Backup: To stores the files needed to recover data thats been wiped out by operator error,viruses,or hardware failures. Where you keep data? 1-Internal hard disk 2-External Tape dirve,CD,DVD,USB There is backup Restore utility in Windows: Start >Program files >Controle panel >Backup and restore Start >Program files >Accessories >System Tools >System restore

Backup: To stores the files needed to recover data that’s been wiped out by operator error, viruses, or hardware failures. Where you keep data? 1- Internal hard disk 2- External Tape dirve, CD, DVD, USB There is backup & Restore utility in Windows: Start >Program files >Controle panel >Backup and restore Start >Program files >Accessories >System Tools >System restore Backup Security

Backup Security There are a several kind of Back up: 1-Full backup: makes a fresh copy of every file in the folders you have specified for the backup. 2-Differential backup: makes a backup of only those files that were added or changed since your last full backup session. 3-Incremental backup: makes a backup of the files that were added or changed since the last backup-not naccessarily the files that changed from the last full backup. 4-Windows Registry backup: makes a backup of the Registry(is an important group files the windows OS uses to store configuration information about all devices and software installed on a computer system. Update when you install new software or hardware

There are a several kind of Back up: 1- Full backup: makes a fresh copy of every file in the folders you have specified for the backup. 2- Differential backup: makes a backup of only those files that were added or changed since your last full backup session. 3- Incremental backup: makes a backup of the files that were added or changed since the last backup-not naccessarily the files that changed from the last full backup. 4- Windows Registry backup: makes a backup of the Registry( is an important group files the windows OS uses to store configuration information about all devices and software installed on a computer system. Update when you install new software or hardware Backup Security

Backup Security Boot and Recovery disks Boot Disk: Is a removable storage meduim containing the operating system files needed to boot your computer without accessing the hard disk. Recovery disk: Is a bootable CD,DVD,or other media that contains a complete copy of your computer's hard disk as it existed when shipped from the manufacturer. On local computer D:Recovery Recovery software like Norton Ghost

Backup Security Boot and Recovery disks Boot Disk: Is a removable storage meduim containing the operating system files needed to boot your computer without accessing the hard disk. Recovery disk: Is a bootable CD, DVD, or other media that contains a complete copy of your computer’s hard disk as it existed when shipped from the manufacturer. On local computer D:\ Recovery Recovery software like Norton Ghost