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Most programs will also give the option of recovering or fixing bad blocks by either a full erase / recertify option or sector reallocation. If a 2nd hand / older hd then its still a good idea to do a full scan to be sure its good.
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If you are talking a brand new hd then Id always reccomend doing a full manufacturer test to be certain you have a good drive. IBM's and hitatchis are DFT (drive fitness test).
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For example if you have a samsung hdd then you need HUTIL (v2.10 is current) and us that to do a full drive scan / test, for seagate and maxtors youd need Seatools and Western Digital you need DLGDiag. Hi, best and safest method is go to the manufacturers website and download the relevent test software that is usually in ISO format to burn to a bootable cd or to make a bootable fdd.
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