# [OmniOS-discuss] Warning that partition is too large when mirroring identical disks in root pool

Willard Korfhage omniti at familyk.org
Fri Feb 7 17:14:07 UTC 2014

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    I just installed OmniOS r151008j last night, and today I wanted to
    mirror rpool, but have a warning about the disk size. I have 2 Seagate
    1TB disks (model ST1000LM024HN), and my OmniOS install is on one of
    them. I told the install to use the whole disk. Some version of
    OpenIndiana was previously installed on the disk. The install went
    without any problem.

    c2t0d0 is the disk with OmniOS
    c2t1d0 is supposed to be its mirror

    To do the mirroring, following the directions in the wiki, I did

    root at s1:~# pfexec fdisk -B c2t1d0p0
    root at s1:~# pfexec prtvtoc /dev/rdsk/c2t0d0s2 | pfexec fmthard -s -
    /dev/rdsk/c2t1d0s2
    fmthard: Partition 2 specifies the full disk and is not equal
    full size of disk. The full disk capacity is 1953407610 sectors.
    fmthard: Partition 2 specified as 1953471870 sectors starting at 0
      does not fit. The full disk contains 1953407610 sectors.
    fmthard: New volume table of contents now in place.

    At this point I stopped, and haven't done the mirror.

    For the disk with the install, format reports

    Current Disk = c2t0d0
    <ATA-ST1000LM024HN-M-0001 cyl 60797 alt 2 hd 255 sec 126>
    /pci at 0,0/pci8086,1c02 at 1f,2/disk at 0,0

    and further information is

    root at s1:~# pfexec prtvtoc /dev/rdsk/c2t0d0s2
    * /dev/rdsk/c2t0d0s2 partition map
    *
    * Dimensions:
    *     512 bytes/sector
    *     126 sectors/track
    *     255 tracks/cylinder
    *   32130 sectors/cylinder
    *   60799 cylinders
    *   60797 accessible cylinders
    *
    * Flags:
    *   1: unmountable
    *  10: read-only
    *
    * Unallocated space:
    *       First     Sector    Last
    *       Sector     Count    Sector
    *           0     32130     32129
    *
    *                          First     Sector    Last
    * Partition  Tag  Flags    Sector     Count    Sector  Mount Directory
            0      2    00      32130 1953375480 1953407609
            2      5    01          0 1953471870 1953471869
            8      1    01          0     32130     32129

    Any idea what is going on?

    I tried to format the disk without the install (c2t1d0), just to start
    with a completely fresh disk, but it doesn't work. This appears to be a
    long-standing (11-month old) Illumos bug
    (https://www.illumos.org/issues/3610)

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