>About a partition one wants to know start and length.
>About a full disk one wants to know size, and perhaps a (fake) geometry.
>
>The vital partition data cannot depend on obscure hardware info.
>So, the units used must be well-known. Earlier, everything was in
>512-byte sectors, but there are a few places where that is inconvenient
>or unnatural, and now that one has more than 2^32 sectors and 64 bits
>are needed anyway, things are measured in bytes.
>
>That the start field comes with the HDIO_GETGEO ioctl and the size with
>the BLKGETSIZE ioctl is due to history. Both are given in 512-byte sectors.
>BLKGETSIZE64 gives bytes.
Just to make sure I got that right, HDIO_GETGEO delivers a FAKE geometry
based on the assumption that the sector size is 512 bytes ?
blue skies,
Martin
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This archive was generated by hypermail 2b29 : Sun Jul 07 2002 - 22:00:09 EST