Structure of Information Storage

First, let us note the physical part of the storage system. From every storage device, hard disk, CD, DVD, Pen Drive, etc., we must be able to access at random any specific data stored there. Technical Data used in the field explained in  computer courses in Rawalpindi. This is done by random data access to the storage locations or spaces in the disk.

The other type is sequential data access which is done, say, as in the magnetic tape spooled for tape recorders, where the locations can be accessed only in sequence. Obviously for faster operation random access is required. For this purpose the space of every storage -disk is divided and marked as Tracks and Sectors. So, a track number and sector number identify every unit of storage space of the disk. The first track, called Track 0, is kept for recording an index (like the Contents in the first page of any book) of the information (specified b y a name called filename) stored in various locations of the disk. In computer terminology this is called File Allocation Table (FAT). In earlier architecture the unit of storage space divisions was 16 bit, and we used to have FAT-16 storage system. Now we have FAT-32 or even FAT-64 systems, which contain much higher volume of data. Windows often uses another system known as NTFS (New Technology File System). Some more details of computer courses in rawalpindi are as under.

All set of information must be stored or written in the disk by giving some unique filename to it. These filenames are to be given by us to the information, which we create and/or need to store, using some text or alphanumeric letters. Not e that there are some restrictions here, e.g. we cannot use symbols like, ? , > < * & etc. in the file name. Too long filenames are also not desirable (earlier there was a restriction of 8 letters). Secondly, to every filename further 3 -4 letters are attached after a period (.) sign, which is called the file extension. Usually you may not see these extensions (except when you examine the filename details), as they are automatically attached by the application programs by which you generate the information to be saved (stored) in the storage disk. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join computer courses in Islamabad.