Direct. Data can be accessed directly without going through all the preceding data to find what is required. An example of serial access would be tape.
Serial Access: • In serial access the data is accessed from the beginning and the searched through the entire bits of data until the required information is found. • Example of serial access can be found in daily life: The old film reel where the movie starts at the beginning and data is read in order till the end. Direct Access: • In this method the computer can calculate, and the search the file, for the given information, and the computer directly goes to the given in formation. • Example of this access in daily life: Pen drive, it is easily accessed it can store DVD movies
disk storage-> direct data access storage tape storage -> serial data access storage
Serial access storage refers to a type of data storage where information is read and written in a sequential manner, meaning that data must be accessed in a specific order. This contrasts with random access storage, where data can be retrieved in any order. Examples of serial access storage include magnetic tapes and some types of optical storage, which are often used for backups and archiving due to their high capacity and cost-effectiveness. However, accessing specific data can be slower since the storage medium must move to the correct position sequentially.
, Both terms "direct access" and "sequential access" as you must have guessed refer to accessing schemes in the file system. In broadest sense difference between these two can be stated like this -In sequential access data is stored at random locations. -In direct access data is stored at sequential locations. ( Ironically this is true No matter what kind of first impression we get when we hear it for the first time. ) -In sequential access addition of data is fast but retrieval of data is slow. -In direct access addition of data is slow as reordering of data blocks may be needed to put current data block after the last used data block for the file. But retrieval of data is fast. -Data structure implementing Sequential access is linked list. -Data structure implementing Direct access is an Array. Application areas:- A situation where rate of addition of data is much larger compared to retrieval of data Sequential access is preferred, in opposite situation Direct access is more suitable. Regards, Prime There are technical explanations as to how it works, but in simple terms, direct access means going straight to the record you want, whereas sequential access means going through all records one by one until you find the one you want.
Someone over at P38forum.com might have access to sn data.
Magnetic tape is considered a serial access medium because data is stored sequentially along the length of the tape. To access a specific piece of data, the tape must be wound forward or backward until the desired point is reached, making the retrieval process inherently linear. This contrasts with random access mediums, where data can be accessed directly without sequential movement. As a result, while magnetic tape is efficient for large volumes of data storage, it is slower for retrieval compared to random access systems.
Ruger has extensive sn data on their web site you can access.
serial chip
You will need to call Colt. That sn does not appear in any published data I have access to.
Someone over on the P38forum.com, in the PPK sub forum, might have access to the sn data.
Ruger has sn data on their site. Currently, my ISP won't let me access it.