What is the best (that you know of) commercial data recovery software? If a hard drive fails (SATA/ATA/SCSI), what is the best software to use to recover data from it?
edit: the reason I specified "commercial" is because I wanted to illustrate that I'm not the one in need of any kind of backup for myself. I'm looking for a software that's great that commercial data-recovery centers use. Yes, I know they use hardware as well as software...but if anyone could point me in the direction of which commercial software they use, then that's what I'm looking for.