Re: ATA 4 KiB sector issues.

From: H. Peter Anvin
Date: Mon Mar 08 2010 - 02:57:13 EST


On 03/07/2010 11:00 PM, James Bottomley wrote:

The 2TB size for msdos partitions is a problem independent of the 4k
sector issue. Traditional 512 byte sector drives are now available in
those sizes. It looks like we're going to have to move to a new
partitioning label to solve this.

There's actually another barrier at 8 or 16TB, which is where a 4k
logical sector filesystem tops out using 32 bit block offsets (it's 8TB
if the fs hasn't been proof checked against sign extension problems).


The limit for the MS-DOS partition tables is 2^32 sectors. The patch that Daniel posted was for a Linux kernel internal limit that set the limit to 2 TB.

-hpa
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