[clug] 3TB (4k sector) disk question [solved]

Eyal Lebedinsky eyal at eyal.emu.id.au
Mon Sep 3 16:03:46 MDT 2012

After much fiddling, I moved the disk from the 8way SATA card (IBM ServeRAID-MR10i)
to the mobo and now the full disk is visible :-)


On 09/01/12 18:49, Eyal Lebedinsky wrote:
> [This is up to date f16]
> Today I bought a 3TB disk, which originally was in a USB3 case (now out of it).
> When introduced linux (as bare SATA) it seems that a sector size of 512B is used,
> and the disk size is limited.
> 'hdparm -I' knows that this is a native 4k disk:
>      Model Number:       ST3000DM001-9YN166
>      Logical  Sector size:                   512 bytes
>      Physical Sector size:                  4096 bytes
>      Logical Sector-0 offset:                  0 bytes
>      device size with M = 1024*1024:     2861588 MBytes
>      device size with M = 1000*1000:     3000592 MBytes (3000 GB)
> However parted thinks otherwise (I created one large GPT partition):
> # parted /dev/sdi
> GNU Parted 3.0
> Using /dev/sdi
> Welcome to GNU Parted! Type 'help' to view a list of commands.
> (parted) print
> Model: ATA ST3000DM001-9YN1 (scsi)
> Disk /dev/sdi: 2199GB
> Sector size (logical/physical): 512B/512B
> Partition Table: gpt
> Number  Start   End     Size    File system  Name     Flags
>   1      1049kB  2199GB  2199GB  ext2         primary
> Note the line 'Sector size (logical/physical): 512B/512B'.
> How do I make linux use 4k sector size? Or is there a jumper
> on the disk? Or a special SATA command to configure the disk?
> Also, should GPT not be able to create very large disks even with 512B
> sectors, using the 64bit internal pointers/sizes/etc.? Where is the
> disk size limit coming from?
>      Eyal

Eyal Lebedinsky	(eyal at eyal.emu.id.au)

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