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Re: formatting a 12.73 Tb disk on ROCKS 5.2



The drives are Seagate Constellation disks, 1 Tb apiece.  I have 15 of them
in the array.

On Thu, May 9, 2013 at 3:25 PM, <m roth 5-cent us> wrote:

> Doll, Margaret Ann wrote:
> > On Thu, May 9, 2013 at 3:09 PM, <m roth 5-cent us> wrote:
> >
> >> Doll, Margaret Ann wrote:
> >> > The answer came from my vendor at Atipa.
> >> >
> >> > You will need to change the partitioning scheme to use GPT in order to
> >> > enable greater than 2TB support.
> >>
> >> Which is what I was saying.
> >> >
> >> > # parted -s /dev/sda mklabel gpt
> >>
> >> This is command-line version of what I said - I was giving you the
> >> interactive version. I do not understand why the above would work, and
> >> what I suggested you do gave you "invalid token".
> >> >
> >> > # parted –s /dev/sda rm 1
> >>
> >> The above removes partition 1.
> >> >
> >> > # parted –s /dev/sda “mkpart primary xfs 1 -1”
> >> >
> >> You've decided to use xfs, yes? And the 1 bothers me, a lot. That's
> >> either sector or cylinder... and they did *not* tell you to use -a
> optimal for
> >> aligning the partition. If you do parted -l, what do you see?
> >>
> > [root nas-0-0 ~]# parted -l
> >
> > Model: AMCC 9650SE-16M DISK (scsi)
> > Disk /dev/sda: 14.0TB
> > Sector size (logical/physical): 512B/512B
> > Partition Table: gpt
> >
> > Number  Start   End     Size    File system  Name     Flags
> >  1      17.4kB  14.0TB  14.0TB  xfs          primary
> >
> > df -h
> >
> > /dev/sda1              13T  8.4G   13T   1% /bigdisk1
>
> Yup - if this were a single disk, that would not be a good place to start,
> esp. if it was a large disk. I don't know how big the drives in the array
> are, and even though parted says it's 512/512 sector size, most new large
> drives are, in reality, 4k in hardware/firmware. You *might* consider
> repartitioning, but start at 2048k, rather than 1. I suspect that if you
> did
>       parted align-check optimal /dev/sda1
> that it would tell you it was not aligned properly.
>
>        mark
>
>
>
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