Tuesday, November 17, 2009
Dos commands
check disk Options
fsutil dirty query c: This command is used to view the disk (Dirty disk) Status
Ans: Volume - is NOT Dirty
chkdsk c:/f /r
f - f is used to automatically correcting the Disk erroring data
r - r command is used to automatically corrected the bad sectors ( hard disk critical disk areas data will be automatically recoverd )
chkdsk [volume:][[path]filename] [/f] [/v] [/r] [/x] [/i] [/c] [/l[:size]]
/v - one by one check the directorys and the directory including file will be diplayed the check disk processing time
/x - this command is used in only supportd NTFS file format /x command is used to //f command works will be processed. so /f command you dont used in NTFS format file systems
/i - (NTFS) this commad is only used to Index file types (slowing this checking process)
/c - (NTFS)This command is used to cycle's only checked in floder Structures(this process faster then normal checking. so this is processing time is saved)
/l - This command is used to create the log file with in your typeing size.
you will be not type the size of parameter, so /i command is display the log file original size
check disk command websites
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/enus/chkdsk.mspx
http://support.microsoft.com/default.aspx?scid=kb;187941
Friday, August 28, 2009
Internet
wireless histry
AM = (amplitude modulation)1906
SW =(shortwave) Radio 1921
FM = (Frequency Modulation) 1931
GSM= Groupe special Mobile 1982
wifi(Wireless Fidelity) = 1997
Wi-Fi uses both single carrier direct-sequence spread spectrum radio technology
(Part of the larger family of spread spectrum systems) and multi-carrier
OFDM (Orthogonal Frequency Division Multiplexing) radio technology.
The regulations for unlicensed spread spectrum enabled the
Development of Wi-Fi, its onetime competitor HomeRF, Bluetooth,
And many other products such as some types of cordless telephones
Half-size ISA 2.4 GHz Wave LAN card by AT&T
A Wi-Fi antenna
A roof mounted Wi-Fi antenna
Advantages and challenges [edit] Operational advantages
A keychain size Wi-Fi detector.
Bluetooth =1998
Bluetooth 1.0 =1999
UMTS = 2002
EDGE = 2003
Bluetooth2.0=2004
wifi new technology = 2009
And Informations By
GLOBAL SYSTEMS & NETCAFE
gitsnet@live.com
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