# [OmniOS-discuss] Advanced format disks – 512E

Richard Elling richard.elling at richardelling.com
Thu Aug 22 00:30:02 UTC 2013

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    On Aug 21, 2013, at 5:26 PM, Michael Rasmussen <mir at miras.org> wrote:

    > On Wed, 21 Aug 2013 17:17:56 -0700
    > Richard Elling <richard.elling at richardelling.com> wrote:
    >
    >>
    >> Broken parted? :-P
    >>
    > jep. Generic IDE from a SATA 3 disk looks weird;-)
    >>> Partition Table: gpt
    >>>
    >>> Number  Start   End     Size    File system  Name  Flags
    >>> 1      131kB   1000GB  1000GB               zfs
    >>> 9      1000GB  1000GB  8389kB
    >>
    >> The OmniOS equivalent "prtvtoc /dev/rdsk/c7t2d0p0" should should show
    >> something like:
    >> prtvtoc /dev/rdsk/c1t8d0p0
    >> * /dev/rdsk/c1t8d0p0 partition map
    >> *
    >> * Dimensions:
    >> *     512 bytes/sector
    >> * 27262976 sectors
    >> * 27262909 accessible sectors
    >> *
    >> * Flags:
    >> *   1: unmountable
    >> *  10: read-only
    >> *
    >> * Unallocated space:
    >> *       First     Sector    Last
    >> *       Sector     Count    Sector
    >> *          34       222       255
    >> *
    >> *                          First     Sector    Last
    >> * Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
    >>       0      4    00        256  27246303  27246558
    >>       8     11    00   27246559     16384  27262942
    >>
    >> Which is how the default ZFS partition is set. 256 sectors is a multiple of 1 and 8.
    >> Methinks something else is going on here.
    >> -- richard
    >>
    > prtvtoc /dev/rdsk/c7t2d0p0
    > * /dev/rdsk/c7t2d0p0 partition map
    > *
    > * Dimensions:
    > *     512 bytes/sector
    > * 1953525168 sectors
    > * 1953525101 accessible sectors
    > *
    > * Flags:
    > *   1: unmountable
    > *  10: read-only
    > *
    > * Unallocated space:
    > *	First     Sector    Last
    > *	Sector     Count    Sector
    > *          34       222       255
    > *
    > *                          First     Sector    Last
    > * Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
    >       0      4    00        256 1953508495 1953508750
    >       8     11    00  1953508751     16384 1953525134

    ok, so you're aligned :-) Problem is something else :-(
    Since this is a mirror, use "iostat -zxn 1" to see if the two sides of the mirror have
    different service times (asvc_t).
     -- richard

    --

    Richard.Elling at RichardElling.com
    +1-760-896-4422

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