linux-ext4 - Meta BGs and Flex BGs

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Date:	Wed, 17 Mar 2010 09:50:56 -0400
From:	"Wei, Zibiao" <zwei@...csort.com>
To:	<linux-ext4@...r.kernel.org>
Subject: Meta BGs and Flex BGs

Hi,

Can both EXT4_FEATURE_INCOMPAT_META_BG and EXT4_FEATURE_INCOMPAT_FLEX_BG
flags turn on the same time? If yes, I am wondering whether there is a
correlation between the numbers of block groups in META group and FLEX
group. Where are backups of superblock and group description table (GDT)
stored in this case?



Thanks.


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