Floppy disk format

The terms single-sided (SS) and double-sided (DS ) available in the digital storage technology application and have different meanings depending on the medium.

Storage media

Memory modules

In memory modules, the terms single-sided and double-sided indicate whether the modules are fitted only on one or both sides of the printed circuit board with memory chips. While in some series (for example SIMM) could be from on the electrical wiring, so the organization of the module is closed, this is not the case in general. Therefore designations were for better differentiation for the organization as single-rowed/double-rowed, single row / double row, single-banked/double-banked, single-ranked/double (dual) -ranked, etc., inserted.

To distinguish SDRAM modules following rule of thumb:

  • If only one side of the module chips soldered, so it is almost always a one- bank module.
  • Are soldered on both sides of the module of eight or more chips, so it is highly likely that a two-bank module.
  • Are soldered on both sides of the module of four or fewer chips, the organization is not recognizable. In this configuration, one-and two - bank modules occur equally.

During the assembly of the main circuit board with the main memory should be paid to the number of banks per memory module, because a motherboard can only manage a certain number of memory banks. A bank modules are supported in the normal case of each memory interface. Two bank modules, however, must be explicitly supported by the memory interface of the motherboard, which at current products is not always the case. Supports the motherboard no two bank modules or does not have enough free memory banks, is recognized and managed half the capacity of the module normally.

Magnetic

In the area of ​​disc media (english disk storage) such as floppy disks or hard disks describes whether the media contains one or both sides information. Previously, these media have only included on a page data almost exclusively on both.

3 ½ "floppy disk, double sided

Optical

DVDs are available in single -sided and double -sided version (not to be confused with single-layer and double-layer ) available. Double-sided DVDs have twice the capacity of single-sided DVDs, which can be used only with the disadvantage of re-engaging the medium but.

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