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Re: formatting a 12.73 Tb disk on ROCKS 5.2



This nas is on a ROCKS cluster and I make as few changes as possible as
active research and classes keep it in constant use.

On Thu, May 9, 2013 at 4:02 PM, <m roth 5-cent us> wrote:

> Doll, Margaret Ann wrote:
> > On Thu, May 9, 2013 at 3:45 PM, Jonathan Billings
> > <jsbillin umich edu>wrote:
> >
> >> align-check is not supported on the old version of parted in EL5.2.
> >>
> > I am running CentOS release 5.6 on this system.
>
> Why have you not updated? RHEL 5.x is at 5.9, and there are a lot of bug
> and security fixes....
>
>      mark
> >>
> >> On Thu, May 9, 2013 at 3:37 PM, Doll, Margaret Ann
> >> <margaret_doll brown edu>wrote:
> >>
> >> > parted align-check optimal /dev/sda1
> >> > Error: Could not stat device align-check - No such file or directory.
> >> > Retry/Cancel? cancel
> >> >
> >> > On Thu, May 9, 2013 at 3:26 PM, Doll, Margaret Ann
> >> > <margaret_doll brown edu>wrote:
> >> >
> >> > > 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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> >> > >>
> >> > >
> >> > >
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> >>
> >>
> >>
> >> --
> >> Jonathan Billings <jsbillin umich edu>
> >> College of Engineering - CAEN - Unix and Linux Support
> >> --
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