Bug 296915 – <=kernel-2.6.32: use wrong (static) sector size for EFI GPT -> unknown partition table

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Kevin Zuber 2009-12-14 18:08:41 UTC]

The kernel (gentoo and vanilla) is using the wrong sector size for EFI GPT.
It uses strictly 512-byte sectors but it should be based on the logical block size.

Reproducible: Always

Steps to Reproduce:
1. Make a GPT with a non 512 Sector size
2. Attach the drive to a gentoo based system
3. dmesg

Actual Results:  
unknown partition table

Expected Results:  
use it as /dev/sdXY

You can get more information on this problem and a fix on linus' repo:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7d13af3279985f554784a45cc961f706dbcdbdd1
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=87038c2d5bda2418fda8b1456a0ae81cc3ff5bd8

[Comment 1 Mike Pagano 2009-12-19 18:58:34 UTC]

Can you/Have you applied those two patches referenced in your decription and determined if they fix the issue?

[Comment 2 Mike Pagano 2009-12-19 19:12:04 UTC]

I added this to our SVN but I don't want to release a new kernel with it until I hear from your it works.

Thanks

[Comment 3 Mike Pagano 2009-12-27 18:16:02 UTC]

Released in gentoo-sources-2.6.32-r1