Re: [gentoo-user] 1-Terabyte drives - 4K sector sizes? -> bar performance so far

[Stroller]

On 9 Feb 2010, at 00:05, Frank Steinmetzger wrote:
> ...
>> - probably about the worst value it could be.
>
> Hm.... what about those first 62 sectors?

If I'm understanding correctly, then the drive will *always* have to  
start at the 63rd sector, then swing back round and start reading a  
1st sector, for every read larger than 1 byte.

This will result in a minimum of one extra rotation of the disk's  
platter for every read, and instead of reading larger data  
contiguously the effect will be like a *completely*, least-optimally  
fragmented filesystem.

I may be mistaken on this - if that's the case I would love to be  
corrected.

The results shown by Valmor & Mark are *two orders of magnitude  
faster* when the partitions are correctly aligned.

Stroller.