Hi,
I ran blktrace while reading a file on XFS partition and here's it's output.
8,17 3 1 22.065944956 5489 D R 20973896 + 8 [cat]
Using xfs_db, I dumped the inode for the same file and it shows the following as its data extents.
u.bmx[0] = [startoff,startblock,blockcount,extentflag] 0:[0,2621481,1,0]
I understand that blktrace reports in 512-byte sectors while xfs_db in filesystem block size (which is the default 4KB on my setup).
Converting blktrace offset to fs block = 2621737 which is close to the data extent startblock (2621481), but still off by 256 fs blocks.
Could someone please help understand the reason for this mismatch?
Thanks,
Sushma
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