Originally Posted by refusedchaos
oh and how do you do a complete wipe on a SSD
? i know you cant just format it regularly to get all the blocks back.
SSDs can suffer from fragmentation. It's low-level fragmentation, so OS filesystem level defrags won't help. But I hope that large, sequential writes will enable the SSD
controller to automatically defrag, and a compelete wipe is the biggest sequential write possible.
To wipe the drive before reinstalling, I plan to boot off a Linux LiveCD/USB, then run a command like "sudo dd if=/dev/zero of=/dev/sda". This will zero out the entire* first "hard" drive. I hope this helps performance.
On better SSDs than my 4GB STEC, there are other, superior options for wiping to restore performance, like manufacturer tools and utilities which perform ATA secure erase. I don't know what options you have on other Mini 9 SSDs.
* Technically, this command doesn't erase the entirety of a disk. But unless you're being targeted by a three letter agency or really bored hackers buy your used computers, it's pretty secure.