first block in ext3 filesystem

Hi...

On Tue, Aug 7, 2012 at 1:04 AM, Prashant Shah [off-list ref] wrote:

Hi,

I came across this

$sudo dumpe2fs /dev/sda1

4KB Block Size
Group 0: (Blocks 0-32767)
  Primary superblock at 0, Group descriptors at 1-1

1KB Block Size
Group 0: (Blocks 1-8192)
  Primary superblock at 1, Group descriptors at 2-2

I think it has something to do with the alignment. At the first case,
your 4K block size formatted partition align perfectly, so it is
usable right from block 0.

OTOH, on 1K block size, block 0 must be skipped and starting from
block 1, it align perfectly.

Not sure which alignment size your disk use. Maybe it's 4K, since
nowadays 4K disk is becoming common ones

CMIIW people...

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
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