On Thu, Feb 09, 2012 at 10:27:05PM +0800, Jeff Liu wrote:
> Strange, I also tried to build XFS with 2k which shown as following:
>
> $ sudo mkfs.xfs -b size=2k -n size=2k -f /dev/sda7
>
> $ xfs_info /dev/sda7
> meta-data=/dev/sda7 isize=256 agcount=4, agsize=1418736 blks
> = sectsz=512 attr=2
> data = bsize=2048 blocks=5674944, imaxpct=25
^^^^^^^^^^
> = sunit=0 swidth=0 blks
> naming =version 2 bsize=2048 ascii-ci=0
^^^^^^^^^^
> log =internal bsize=2048 blocks=5120, version=2
^^^^^^^^^^
The block size for data, metadata, directories and the log is 2k,
just like you asked.
> = sectsz=512 sunit=0 blks, lazy-count=1
> realtime =none extsz=4096 blocks=0, rtextents=0
For the non-existent realtime device, the default is an extent size
of 4k. However, extent size for the real time device is separate
from the data/log device block size - it's more like the bigalloc
ext4 functionality in that it defines the default extent allocation
size and alignment for the RT device.
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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