Manytimes TRIM is enabled to write the zero's over deleted areas. When your sytemdisk is a SSD-drive you want it to be quick and performing. While you win in security and performance by doing so, the wear and tear on that flash-media will be significantly increased and shorten its life. For securiity reasons you might not want that (not enabling others using an application like todays GOTD whenever they can work on one of your USB-sticks) or for performance reasons you might like those areas filled with zero's makinig it faster to write there something new again.įilling previously written areas on flash-media with zero's is called in a more modern way Low Level formatting (but is in no way the same as the classical meaning). Areas previously used are still written upon with "old" bits and bytes. Deleting something on flash-media does not erase any bits, only the index. And now it is mostly connected to flash-media.įlash media have the weird habbit that it is easier to write something over a "0" then writing somthing over something else. That's why this term gets a little outdated as typical users are not to Low Level format anymore, only the manufacturer does and should.īut a more modern re-use of the term Low Level formatting gets to be popular these days (and more confusing aswell). No need to Low Level format a HD yourself anymore.
Nowadays a diskcontroller is integrated in your HD-module (many don't even know that it's there) and Low level formatting is done while manufacturing the HD for sale. This was done to ensure your typical diskcontroller could handle your HD while using it (the reading and writing was in tune using the diskcontrollers particular "dialect" on the very HD). Because your disk controller (chip) could differ significantly from the one someone else was using ('speaking' a slightly different dialect about how things are magnetically arranged), it was important to Low Level format your HD before using it. In the early days HD's came without integrated diskcontrollers. It has everything to do with spinning HD-platters and moving read/write heads, which are simply not there in Flash-media (just an electronic chip). It's classical meaning was never intended to be used on Flash-media. This is a somewhat outdated term nowadays.
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