Re: LVM and XFS cannot set blocksize on block device

[Eric Sandeen <sandeen@sandeen.net>]

Shailendra Tripathi wrote:

> libxfs_device_open () seems to be working with the pre-conceived notion 
> of assuming block devices of only 512 bytes in size.
> 
> if (!readonly && setblksize && (statb.st_mode & S_IFMT) == S_IFBLK)
>     platform_set_blocksize(fd, path, statb.st_rdev, 512);
> 
> This eventually calls to set the blk sz to 512. Since, your volume does 
> not support less than 4k, it returns EINVAL. I think, libxfs_init should 
> be modified to take pass on the -s size option to this call so that it 
> does not happen.
>       However, I don't see any problem despite this failure. Everything 
> else should work fine.
> 

Yep, this looks to me like an oversight when the larger-sector-size
support was added.  Seems like if the device can't be set to a smaller
sector size than X, then the tools should run as if a sector size of X
had been specified?

-Eric