>> >> smartctl -i /dev/sdb; blockdev --getbsz --getpbsz /dev/sdb >> Device Model: HGST HUS722T2TALA604 >> User Capacity: 2,000,398,934,016 bytes [2.00 TB] >> Sector Size: 512 bytes logical/physical >> Rotation Rate: 7200 rpm >> Form Factor: 3.5 inches >> 4096 >> 512 >> >> As you see “–getbsz” forever 4096. > I also see logical block size to be 4096 for all devices on my system. >> But I think it must be forever 512. >> What does it mean? > I have seen the following description about logical and physical block sizes > somewhere in the internet: > "Logical block sizes are the units used by the 'kernel' for read/write > operations.
Kernel can but usually does not want, because reduce performance. > Physical block sizes are the units which 'disk controllers' use for > read/write operations." Not disk controller on the motherboard, but controller inside disk. We don't have access to it. > > For the problem mentioned in this thread, the physical block size is what you > are looking for. >> I think it is BUG in the "blockdev(util-linux)". My question was: Can this error(or similar) be related to a problem in pvmove?
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