I see no way to convert LBA to disk position

[Artem Kuchin]

31.03.2020 22:45, Kevin P. Neal пишет:
> On Tue, Mar 31, 2020 at 10:28:43PM +0300, Artem Kuchin wrote:
>
>> Then i wrote zeros to the bas sector
>> dd if=/dev/zero of=/dev/ada2 bs=512 oseek=5020507656 count=8
> Wait, does this mean that the two disks in your mirror have different
> data at the same block address? Is that safe? Does gmirror keep track
> of bad blocks and avoid reading from them "forever" when it hits one?
>
> If it was me I'd copy the block from the good drive to the bad drive
> instead of writing zeros.


I don't think it is important because those blocks are unallocated (i 
checked), but

eventually, when did so - copied from one disk to another.  I wrote 
zeros because

smart specs say that i need to write zeroes to resolve pending sector.