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Re: formatting a 12.73 Tb disk on ROCKS 5.2



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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