search for: blkpbszget

...ed. I think we need to ask an expert > or look at the qemu / kernel code to find out exactly what > each setting really does. Here are what they do stand for: physical_block_size: The physical block size the disk will report to the guest OS. For Linux this would be the value returned by the BLKPBSZGET ioctl and describes the disk's hardware sector size which can be relevant for the alignment of disk data. We don't have an API to get this one. logical_block_size: The logical block size the disk will report to the guest OS. For Linux this would be the value returned by the BLKSSZGET ioctl...

On Mon, Feb 10, 2020 at 02:22:01PM +0200, Nikolay Ivanets wrote: > Here are what they do stand for: > physical_block_size: The physical block size the disk will report to > the guest OS. For Linux this would be the value returned by the > BLKPBSZGET ioctl and describes the disk's hardware sector size which > can be relevant for the alignment of disk data. We don't have an API > to get this one. > > logical_block_size: The logical block size the disk will report to the > guest OS. For Linux this would be the value return...

...9,28 @@ of the same area of disk. The default is false. +=item C<blocksize> + +The integer parameter C<blocksize> allows specifying both physical and logical +block size the disk will report to the libguestfs appliance. + +Physical block size would be the value returned by the C<BLKPBSZGET> ioctl and +describes the disk's hardware sector size which can be relevant for the +alignment of disk data. + +Logical block size would be the value returned by the C<BLKSSZGET> ioctl and +describes the smallest units for disk I/O. (C<guestfs_blockdev_getss> API call +will retu...

From: Nikolay Ivanets <stenavin@gmail.com> I faced with situation where libguestfs cannot recognize partitions on a disk image which was partitioned on a system with "4K native" sector size support. In order to fix the issue we need to allow users to specify desired physical and/or logical block size per drive basis. It is definitely not a complete patch but rather a way to