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curmudgeon
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PostPosted: Thu Oct 02, 2014 8:12 pm    Post subject: How do I format this hard drive? Reply with quote

I am repurposing this post based on additional testing. :)

Have a ST3000DM001 (note to self - never buy anything from Seagate again - I should have learned that from past experience).

I am getting inconsistencies regarding this disk from very basic tools.

Let's take a look at some partitioning tools first:

Code:

# gdisk -l /dev/sdx

[...]

Disk /dev/sdx: 732566645 sectors, 2.7 TiB
Logical sector size: 4096 bytes

[...]


# parted -l

[...]

Model: Seagate Expansion Desk (scsi)                                     
Disk /dev/sdx: 3001GB
Sector size (logical/physical): 4096B/4096B

[...]


So I attempted (several times) to create a 256 GB partition (which all of the partitioning tools say that I successfully did).

The problem is that every other tool (like the ones that actually access and use the filesystem), claim that the partition is only 32 GB.

A quick look at two of the critical ones reveals that they believe that the logical sector size is 512 bytes (one-eighth of what the partitioning tools report).

Code:

# hdparm -I /dev/sdx

[...]

Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           16      16
        sectors/track   63      63
        --
        CHS current addressable sectors:   16514064
        LBA    user addressable sectors:  268435455
        LBA48  user addressable sectors: 5860533168
        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)

[...]


# smartctl -a -d sat /dev/sdx

[...]

User Capacity:    3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical

[...]


I found someone else whose partitioning tools report 512/4096, which points to the partitioning tools as the source of the problem, but that doesn't help me much.

How do I get the partitioning tools to see the correct number of sectors so I can access the last 7/8ths of the drive?


Last edited by curmudgeon on Mon Oct 06, 2014 12:43 am; edited 2 times in total
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Roman_Gruber
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Joined: 03 Oct 2006
Posts: 3806
Location: Austro Bavaria

PostPosted: Thu Oct 02, 2014 8:35 pm    Post subject: Reply with quote

http://wiki.gentoo.org/wiki/ZFS
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