Anthony,

I'm out here in cyberspace. My "raiding" these days is of the refigerator 
variety.

Isn't raid passe at this point? Nothing better out there? Sounds like a pain in 
the tuckus ;-)

Googling "raid is dead" brings up this gem: 
http://www.storagenewsletter.com/rubriques/market-reportsresearch/why-raid-dead-for-big-storage-cleversafe/
 and 6 million others.

Happy weekend.

On Fri, Oct 24, 2014 at 03:19:44PM -0400, Anthony Carrico wrote:
Wow, you guys are quiet today. To answer one of my own questions:

So take the advertized size:
 4000000000000

Divide it in to 1M chunks:
 4000000000000/1048576=3814697.265625M

Round down:
 3814697M

Subtract 2 for the reserved sectors at the front and back:
 3814695M

This equals
 3814695*2048 512byte logical sectors
or
 3814695*256 4096byte physical sectors

I would expect any drive with the same advertised size to be able to
create partitions totaling up to that value.

I surveyed eight GPT drives.
 * All are at least somewhat bigger than the advertised (decimal) size.
 * GPT normally does 1M (512*2048) partition alignment
 * GPT seems to reserve 34 logical 512 byte sectors at the beginning
and end of the disk (under 1M).

--
Anthony Carrico





--
Joe Golden /_\ www.Triangul.us /_\ Coding, Drupalism, Open Sourcery

Reply via email to