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

[Warren Marts]

This may be a genuine mismatch between the disks.

A few weeks ago I was trying to image between two apparently identical
Western Digital RE2 400GB drives. They were produced on the same day and
their serial numbers were only ~200 apart, but the disk utility reported
block counts that differed by about 20,000 (10 MB) and neither count
matched the one on the disk label.

I was surprised, to say the least.


On Fri, Feb 7, 2014 at 10:14 AM, Willard Korfhage <omniti at familyk.org>wrote:

> 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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>
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