Re: How to improve db performance with $7K?

On Apr 15, 2005, at 11:58 AM, Joshua D. Drake wrote:

>> ALL disks have bad blocks, even when you receive them.  you honestly 
>> think that these large disks made today (18+ GB is the smallest now) 
>> that there are no defects on the surfaces?
>
> That is correct. It is just that the HD makers will mark the bad blocks
> so that the OS knows not to use them. You can also run the bad blocks
> command to try and find new bad blocks.
>

my point was that you cannot assume an linear correlation between block 
number and physical location, since the bad blocks will be mapped all 
over the place.

Vivek Khera, Ph.D.
+1-301-869-4449 x806