| 1 |
On Sun, Feb 07, 2010 at 01:42:18PM -0800, Mark Knecht wrote: |
| 2 |
> OK - it turns out if I start fdisk using the -u option it show me |
| 3 |
> sector numbers. Looking at the original partition put on just using |
| 4 |
> default values it had the starting sector was 63 - probably about the |
| 5 |
> worst value it could be. As a test I blew away that partition and |
| 6 |
> created a new one starting at 64 instead and the untar results are |
| 7 |
> vastly improved - down to roughly 20 seconds from 8-10 minutes. That's |
| 8 |
> roughly twice as fast as the old 120GB SATA2 drive I was using to test |
| 9 |
> the system out while I debugged this issue. |
| 10 |
|
| 11 |
That's good to hear. |
| 12 |
|
| 13 |
> I'm still a little fuzzy about what happens to the extra sectors at |
| 14 |
> the end of a track. Are they used and I pay for a little bit of |
| 15 |
> overhead reading data off of them or are they ignored and I lose |
| 16 |
> capacity? I think it must be the former as my partition isn't all that |
| 17 |
> much less than 1TB. |
| 18 |
|
| 19 |
As far as I know, you shouldn't worry about it. The |
| 20 |
head/track/cylinder addressing is a relic of an older day. Almost all |
| 21 |
modern drives should be accessed via LBA. If interested, take a look |
| 22 |
at the wikipedia entry on Cylinder-Head-Sector and Logical Block |
| 23 |
Addressing. |
| 24 |
|
| 25 |
Basically, you are not losing anything. |
| 26 |
|
| 27 |
Cheers, |
| 28 |
|
| 29 |
W |
| 30 |
-- |
| 31 |
Willie W. Wong wwong@××××××××××××××.edu |
| 32 |
Data aequatione quotcunque fluentes quantitae involvente fluxiones invenire |
| 33 |
et vice versa ~~~ I. Newton |
Archives