sonicmario wrote:
What is the name of the technology that automatically allocates and isolates defective sectors of the HDD?
It's an integral part of how a hard drive works. Technique is called sector reallocation I guess. Simplified a hard drive keeps an address list of all sectors, in addition to a list of spare sectors and list of defects. Defects are subdivided in defects that were established during manufacturing and defects that have grown over time. If a sector is bad it's added to grown defect list. I don't know how this exactly works, this defect list could point to a spare or say main address table points to spare, dunno.
Basically it's lists of good bad and spare sectors. So if LBA 10000 goes bad drive will update it's internal bookkeeping so it will not use it anymore and looks up which spare was assigned to it so when you read or write to LBA 10000 you get to deal with the spare. You as an end user never get to see this other than the statistics in form of SMART data.
A PC3000 will probably get you access to those lists I assume, don't know for certain because I don't have one.
SSD takes this to the extreme as any LBA could be anywhere in the NAND, and once you edit a file it could be in a totally different block of NAND memory.
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Joep -
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