Quick question about parted/fdisk for 2TB disks.

Quick question about parted/fdisk for 2TB disks.

[Justin Piszcz]

Hi,


    Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        3891    31250000   fd  Linux raid autodetect
Partition 1 does not end on cylinder boundary.
/dev/sda2   *        3891        3907      131072   fd  Linux raid autodetect
Partition 2 does not end on cylinder boundary.
/dev/sda3            3907      243202  1922132488   fd  Linux raid autodetect
Partition 3 does not end on cylinder boundary.

But with parted, no issues:

(parted) print 
Model: ATA WDC WD2001FASS-0 (scsi)
Disk /dev/sda: 2000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system     Flags
  1      1049kB  32.0GB  32.0GB  primary  linux-swap(v1)  raid
  2      32.0GB  32.1GB  134MB   primary  ext3            boot, raid
  3      32.1GB  2000GB  1968GB  primary  ext4            raid

(parted)

Only use parted for 2TB+?

Justin.

Re: Quick question about parted/fdisk for 2TB disks.

[Jérôme Poulin]

The problem with fdisk is probably that you have DOS compatibility
mode (when not using -c), it should also be set in sector mode (-u
option) which will eliminate those useless warning.

You could always use gdisk for GPT partition table instead, which
above 2TB is a most anyway.

On Fri, Jan 14, 2011 at 8:52 PM, Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
> Hi,
>
>
>   Device Boot      Start         End      Blocks   Id  System
> /dev/sda1               1        3891    31250000   fd  Linux raid
> autodetect
> Partition 1 does not end on cylinder boundary.
> /dev/sda2   *        3891        3907      131072   fd  Linux raid
> autodetect
> Partition 2 does not end on cylinder boundary.
> /dev/sda3            3907      243202  1922132488   fd  Linux raid
> autodetect
> Partition 3 does not end on cylinder boundary.
>
> But with parted, no issues:
>
> (parted) print Model: ATA WDC WD2001FASS-0 (scsi)
> Disk /dev/sda: 2000GB
> Sector size (logical/physical): 512B/512B
> Partition Table: msdos
>
> Number  Start   End     Size    Type     File system     Flags
>  1      1049kB  32.0GB  32.0GB  primary  linux-swap(v1)  raid
>  2      32.0GB  32.1GB  134MB   primary  ext3            boot, raid
>  3      32.1GB  2000GB  1968GB  primary  ext4            raid
>
> (parted)
>
> Only use parted for 2TB+?
>
> Justin.
>
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Re: Quick question about parted/fdisk for 2TB disks.

[Justin Piszcz]

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On Fri, 14 Jan 2011, Jérôme Poulin wrote:

> The problem with fdisk is probably that you have DOS compatibility
> mode (when not using -c), it should also be set in sector mode (-u
> option) which will eliminate those useless warning.
>
> You could always use gdisk for GPT partition table instead, which
> above 2TB is a most anyway.
>
> On Fri, Jan 14, 2011 at 8:52 PM, Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
>> Hi,
>>
>>
>>   Device Boot      Start         End      Blocks   Id  System
>> /dev/sda1               1        3891    31250000   fd  Linux raid
>> autodetect
>> Partition 1 does not end on cylinder boundary.
>> /dev/sda2   *        3891        3907      131072   fd  Linux raid
>> autodetect
>> Partition 2 does not end on cylinder boundary.
>> /dev/sda3            3907      243202  1922132488   fd  Linux raid
>> autodetect
>> Partition 3 does not end on cylinder boundary.
>>
>> But with parted, no issues:
>>
>> (parted) print Model: ATA WDC WD2001FASS-0 (scsi)
>> Disk /dev/sda: 2000GB
>> Sector size (logical/physical): 512B/512B
>> Partition Table: msdos
>>
>> Number  Start   End     Size    Type     File system     Flags
>>  1      1049kB  32.0GB  32.0GB  primary  linux-swap(v1)  raid
>>  2      32.0GB  32.1GB  134MB   primary  ext3            boot, raid
>>  3      32.1GB  2000GB  1968GB  primary  ext4            raid
>>
>> (parted)
>>
>> Only use parted for 2TB+?
>>
>> Justin.

Hi,

It looks good!

# fdisk -l /dev/sda -c

Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x50b2166c

    Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        3891    31250000   fd  Linux raid autodetect
/dev/sda2   *        3891        3907      131072   fd  Linux raid autodetect
/dev/sda3            3907      243202  1922132488   fd  Linux raid autodetect

Thanks!

Justin.