Write once read many

Write once read many (WORM) describes a <a href="/facts/Data_storage_device/uCvJ6nrq">data storage device</a> in which information, once written, cannot be modified. This <a href="/facts/Write_protection/TkBtcIEG">write protection</a> affords the assurance that the <a href="/facts/Data/AUBFN97o">data</a> cannot be tampered with once it is written to the device, excluding the possibility of <a href="/facts/Data_loss/oGGosFHt">data loss</a> from <a href="/facts/Human_error/DjcKhpy6">human error</a>, <a href="/facts/Computer_bugs/I1uSXySv">computer bugs</a>, or <a href="/facts/Malware/5ee7TLFR">malware</a>.
On ordinary (non-WORM) data storage devices, the number of times data can be modified is limited only by the lifespan of the device, as modification involves physical changes that may cause wear to the device. The "read many" aspect is unremarkable, as modern storage devices permit unlimited reading of data once written. Historical exceptions include time-limited discs such as <a href="/facts/Flexplay/sPD3mepW">Flexplay</a>, designed for short-term rental of movies; and early <a href="/facts/Non-volatile_memory/EN72wMD9">non-volatile memory</a> technologies such as <a href="/facts/Magnetic-core_memory/4TFIXSNd">magnetic-core memory</a> and <a href="/facts/Bubble_memory/gBYFcwJn">bubble memory</a>, from which reading data also erased it.
WORM protects the important files by keeping them safe and intact. It ensures the highest level of integrity and data security by eliminating the risk of important data from being deleted or modified. This way, the WORM helps to preserve the authenticity and safety of recorded data.

Write once read many open-in-new

Write once read many