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Re: formatting a 12.73 Tb disk on ROCKS 5.2



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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