SMART reports for my 120GB Deskstar started to show about 1 new remapped\nsector a month 6 months ago. Today a suspicious crash led me to do a\nsurface scan (read only) after which I found two more sectors had been\nmapped out since I last did a SMART 4 days ago. A second surface scan\nimmediately after the first resulted in two more. (Scandisk reports no\nerrors and 0 bad sectors each time so all this is being done at drive\nlevel.)\n\nDuring the surface scans I noted that disk read rate falls from a steady\n24MB/sec to a hugely varying rate of around 5-10MB/sec for a few hundred\nthousand clusters (170,000-600,000) before settling back to the higher\nspeed (the partition has 1.3 million 4KB clusters). Some of this slowdown\nis clearly due to repeated attempts to read some poor sectors but I wonder\nif it's also partly the heads having to seek to access the already remapped\nsectors (of which there are now 14), since the slowdown continues for such\na long time. Surely there can't be a whole gigabyte or two of dodgy sectors\ncan there?\n\nAssuming the answer to that is no, is it worth running the surface scan\nrepeatedly to try and provoke the drive into remapping all the iffy sectors\n(maybe doing the slower read/write scan rather than just read), or might\nthis somehow make the drive fail quicker? The problem area seems to be only\non the primary 5GB boot partition of the 120GB drive, no other partitions\nexhibit the patchy disk read speeds that the boot partition shows. But\nmight the problem spead (e.g dust floating around or something?)\n\nIs a dozen or so remapped sectors a lot? The rate of decay is alarming me\nbut the fact that they are still under scandisk's radar and seemingly\nlocated in one area of the disk makes me wonder if there's still life left\nin the drive. I was going to get a new drive anyhow as this one's full, but\nI wanted to keep this one for backups at least, as it's under 3 years old\nand I don't really want to junk 120GB of storage if there's a chance I can\nkeep it alive.