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Fix for slow performance of WD15EARS WD10EARS WD20EARS

March 29th, 2010

Long story short – need to create partition which starts from sector dividable by 8 – 48,56,64 etc.

Here is linux how-to:

# parted /dev/sdX
# Set units to sectors (in this case 512B):
(parted) unit s

(parted) rm
Partition number? 1

(parted) print
Model: ATA WDC WD10EARS-00Y (scsi)
Disk /dev/sdb: 1953525168s
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number Start End Size File system Name Flags

(parted) mkpart
Partition name? []?
File system type? [ext2]?
Start? 64
End? -1
Warning: You requested a partition from 64s to 1953525134s.
The closest location we can manage is 64s to 1953525071s.
Is this still acceptable to you?
Yes/No? Yes

(parted) print
Model: ATA WDC WD15EARS-00Z (scsi)
Disk /dev/sdb: 1953525168s
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number Start End Size File system Name Flags
1 64s 1953525134s 1953525071s

(parted) quit
Information: You may need to update /etc/fstab.

Original – http://community.wdc.com/t5/Desktop/Problem-with-WD-Advanced-Format-drive-in-LINUX-WD15EARS/td-p/6395

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  1. Marcus Herou
    April 1st, 2010 at 01:17 | #1

    Hi.

    I have a fresh Kamic system with two of these beasts and the system is so god damn slow, even slower than my slow laptop. My three years old system at work is faster and have 25% less cpu capacity, half the GPU etc.

    What did this solution solve for you ?

    ————–Parted
    parted
    GNU Parted 1.8.8.1.159-1e0e
    Using /dev/sda
    Welcome to GNU Parted! Type ‘help’ to view a list of commands.
    (parted) unit s
    (parted) print
    Model: ATA WDC WD15EARS-00Z (scsi)
    Disk /dev/sda: 2930277168s
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos

    Number Start End Size Type File system Flags
    1 63s 2882253779s 2882253717s primary ext4 boot
    2 2882253780s 2930272064s 48018285s extended
    5 2882253843s 2898640079s 16386237s logical linux-swap(v1)

    Cheers

    //Marcus Herou

  2. April 1st, 2010 at 18:06 | #2

    my system went from “3.5″ diskette”-like performance to a normal sata 3gb/sec.

  3. sombatsombat
    June 14th, 2010 at 04:55 | #3

    At first the command print gave the result:
    Model: ATA WDC WD10EARS-00Y (scsi)
    But later result is:
    Model: ATA WDC WD15EARS-00Z (scsi)

    I think there should be some mistyped.

  4. June 14th, 2010 at 11:08 | #4

    yeah I think I copy and paste’d it from different places. Was verifying if it works for 1Tb, 1.5Tb and 2Tb drives

  5. eric
    October 21st, 2010 at 18:52 | #5

    thanks.
    transfer rates went from 7 to 47mb/s

  6. Chadguy2001
    November 22nd, 2010 at 14:52 | #6

    I’ve had a simular problem with the wd20ears 2tb drive. I had to change my bios setting to native IDE or Auto.

    These drive just don’t perform in ACHI or Raid. Transfer rates went for 6mb-15mb/s to 40mb-60mb/s.

    Much better.

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