Poll Disk alignment..

Disk size, format and alignment

  • 500GB disk, Advanced format, properly aligned

    Votes: 0 0.0%
  • 500GB disk, Advanced format, not aligned

    Votes: 0 0.0%

  • Total voters
    43
Could you post the output of the hdinfo diagnostic?

Code:
>>> Beginning diagnostic hdinfo
Running: hdinfo
 
/dev/sda:
 
ATA device, with non-removable media
    Model Number:                                 
    Serial Number:                  5VX2H6ZE
    Firmware Revision:     
Standards:
    Supported: 8 7 6 5
    Likely used: 8
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: 1953525168
    device size with M = 1024*1024:      953869 MBytes
    device size with M = 1000*1000:    1000204 MBytes (1000 GB)
Capabilities:
    LBA, IORDY(can be disabled)
    Queue depth: 32
    Standby timer values: spec'd by Standard, no device specific minimum
    R/W multiple sector transfer: Max = 16    Current = ?
    AdvancedPM level: unknown setting (0xc0c0)
    Recommended acoustic management value: 254, current value: 0
    DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
        Cycle time: min=120ns recommended=120ns
    PIO: pio0 pio1 pio2 pio3 pio4
        Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
    Enabled    Supported:
      *    READ BUFFER cmd
      *    WRITE BUFFER cmd
      *    Host Protected Area feature set
      *    Look-ahead
      *    Write cache
      *    Power Management feature set
        Security Mode feature set
      *    SMART feature set
      *    FLUSH CACHE EXT cmd
      *    Mandatory FLUSH CACHE cmd
      *    Device Configuration Overlay feature set
      *    48-bit Address feature set
        SET MAX security extension
        SET FEATURES subcommand required to spinup after power up
        Power-Up In Standby feature set
      *    Adv. Power Management feature set
      *    DOWNLOAD MICROCODE cmd
      *    General Purpose Logging feature set
      *    SMART self-test
      *    SMART error logging
Security:
    Master password revision code = 65534
        supported
    not    enabled
    not    locked
    not    frozen
    not    expired: security count
        supported: enhanced erase
    182min for SECURITY ERASE UNIT. 182min for ENHANCED SECURITY ERASE UNIT.
Checksum: correct
 
>>> Ending diagnostic hdinfo

Looks like I have other worries though as webif told me that 'Disk realloc sector count is: 1' when I logged in - some idiot must have said that the box was behaving itself :oops:
 
A Disk realloc sector count of 1 isn't the end of the world, users get concerned if it goes above a 1000 or two
 
Thanks Ezra. I will keep an eye on it. Very useful to have it pointed out via web if and to be directed to the wiki also.
 
If you acknowledge it in the web interface then it won't trouble you with a warning until it rises again.


Posted on the move; please excuse any brevity.
 
Output from a unit purchased from Richer Sounds in October 2012

Code:
>>> Beginning diagnostic 4kalign
Running: 4kalign
 
--> This is an Advanced Format (AF) drive.
 
    Model Number:      ST1000VM002-1CT162                     
    Logical  Sector size:                  512 bytes
    Physical Sector size:                  4096 bytes
    Logical Sector-0 offset:                  0 bytes
    Nominal Media Rotation Rate: 5900
 
Disk /dev/sda: 1000 GB, 1000202273280 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953520065 sectors
Units = sectors of 1 * 512 = 512 bytes
 
  Device Boot      Start        End      Blocks  Id  System
/dev/sda1              2    2104514    1052226  83  Linux
/dev/sda2        2104515  1932539174  965209297  83  Linux
/dev/sda3      1932539175  1953520064    10482412  83  Linux
 
 
*WARNING* - partition /dev/sda1 is misaligned by 1024 bytes.
*WARNING* - partition /dev/sda2 is misaligned by 1536 bytes.
*WARNING* - partition /dev/sda3 is misaligned by 3584 bytes.
 
>>> Ending diagnostic 4kalign

Cheers,

Peter
 
Code:
>>> Beginning diagnostic 4kalign
Running: 4kalign
 
--> This is a Standard Format drive.
 
    Model Number:                  ST3500312CS
    Logical/Physical Sector size:  512 bytes
    Nominal Media Rotation Rate:   5900
 
Disk /dev/sdb: 500 GB, 500105249280 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976768065 sectors
Units = sectors of 1 * 512 = 512 bytes
 
  Device Boot      Start        End    Blocks  Id  System
/dev/sdb1              2    2104514    1052226  83  Linux
/dev/sdb2        2104515  955787174  476833297  83  Linux
/dev/sdb3      955787175  976768064  10482412  83  Linux
 
Standard format drive - partitions are always aligned.
 
>>> Ending diagnostic 4kalign
 
Box at least 3 years old, bought from Dixons in-store, and never opened up or changed the drive:

Code:
>>> Beginning diagnostic 4kalign
Running: 4kalign
 
--> This is a Standard Format drive.
 
    Model Number:      ST3500312CS                         
    Logical/Physical Sector size:          512 bytes
    Nominal Media Rotation Rate: 5900
 
Disk /dev/sda: 500 GB, 500105249280 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976768065 sectors
Units = sectors of 1 * 512 = 512 bytes
 
  Device Boot      Start        End      Blocks  Id  System
/dev/sda1              8    2104510    1052226  83  Linux
/dev/sda2        2104512  955787166  476841330  83  Linux
/dev/sda3      955787168  976768062    10490445  83  Linux
 
 
Standard format drive - partitions are always aligned.
 
>>> Ending diagnostic 4kalign
 
Bought sainsburys April 2012

Running: 4kalign

--> This is a Standard Format drive.

Model Number: ST3500312CS
Logical/Physical Sector size: 512 bytes
Nominal Media Rotation Rate: 5900

Disk /dev/sda: 500 GB, 500105249280 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976768065 sectors
Units = sectors of 1 * 512 = 512 bytes

Device Boot Start End Blocks Id System
/dev/sda1 8 2104510 1052226 83 Linux
/dev/sda2 2104512 955787166 476841330 83 Linux
/dev/sda3 955787168 976768062 10490445 83 Linux


Standard format drive - partitions are always aligned.

>>> Ending diagnostic 4kalign
 
Should I be concerned? This is my output:

>>> Beginning diagnostic 4kalign
Running: 4kalign

--> This is a Standard Format drive.

Model Number:




>>> Ending diagnostic 4kalign
 
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