3 ms·
> There are different techniques for implementing OP (Over provisioning) yourself. You can simply leave a portion of the drive unpartitioned This doesn't sound
by hawk_ 3y ago
> There are different techniques for implementing OP (Over provisioning) yourself. You can simply leave a portion of the drive unpartitioned
This doesn't sound right. Does this mean that the drive decides to arbitrarily move blocks between your partition and unpartioned spaces to manage GC?
- deleted 3y ago[deleted]
- Dalewyn 3y agoUnlike hard drives of yore where ordering the drive to write a bit at a given location results in the drive writing a bit at a given location, SSDs abstract it away as a matter of their design. An SSD will still provide a virtual bitmap so file systems can still order it to write a bit at a given location like ye olde days, but the SSD controller ultimately decides where to actually write that bit which more than likely has no relation to the specified location. Incidentally, yes: This also means defragmenting an SSD is not only harmful, it is outright misleading because the state of the file system is not related to the state of the bits on the drive.
- rasz 3y agoMechanical HDDs have same mechanisms available, its just used for defects https://www.dataclinic.co.uk/hard-drive-defects-table/ https://www.dataclinic.co.uk/hard-drive-defects-table/
- Dalewyn 3y agoIndeed! HDDs remap sectors to reserve sectors if their controller detects the original sectors have become unwritable. The result is quite similar to what SSDs do more broadly; the file system remains as-is, but the workings behind the scene differ from it.