Comment 162 for bug 438136

> 29.000 bad blocks does sound like something you should start being concerned about, though.

The problem is that 29000 is the RAW value of the re-allocated sector count, not the actual count of bad sectors.

I have a failing Seagate drive that I have been monitoring for several weeks and I have established that on this particular drive, the lower four bits of the RAW value are not part of the count. Palimpsest tells me this drive has 893 bad sectors, but I calculate that it only has 55. Seagate will only replace the drive when it has around 160 bad sectors.