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 fdisk /dev/sda
Disk /dev/sda: 640.1 GB, 640133946880 bytes, 1250261615 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x13df13de
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      411647      204800   83  Linux
/dev/sda2          411648    31868927    15728640   83  Linux
/dev/sda3        31868928    65423359    16777216   83  Linux
/dev/sda4        65423360  1250261614   592419127+   5  Extended
/dev/sda5        65425408   101076991    17825792   82  Linux swap / Solaris
/dev/sda6       101079040   105584639     2252800   83  Linux
/dev/sda7       105586688   116072447     5242880   83  Linux
/dev/sda8       116074496   145434623    14680064   83  Linux
/dev/sda9       145436672   146255871      409600   83  Linux
/dev/sda10      146257920   147281919      512000   83  Linux
/dev/sda11      147283968   252141567    52428800   83  Linux
/dev/sda12      252143616  1250261614   499058999+  83  Linux

fdisk -u=cylinders /dev/sda
WARNING: cylinders as display units are deprecated. Use command 'u' to
         change units to sectors.
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          26      204800   83  Linux
/dev/sda2              26        1984    15728640   83  Linux
/dev/sda3            1984        4073    16777216   83  Linux
/dev/sda4            4073       77826   592419127+   5  Extended
/dev/sda5            4073        6292    17825792   82  Linux swap / Solaris
/dev/sda6            6292        6573     2252800   83  Linux
/dev/sda7            6573        7226     5242880   83  Linux
/dev/sda8            7226        9053    14680064   83  Linux
/dev/sda9            9054        9105      409600   83  Linux
/dev/sda10           9105        9168      512000   83  Linux
/dev/sda11           9169       15696    52428800   83  Linux
/dev/sda12          15696       77826   499058999+  83  Linux

 sfdisk -d /dev/sda
sfdisk: Warning: extended partition does not start at a cylinder boundary.
DOS and Linux will interpret the contents differently.
# partition table of /dev/sda
unit: sectors
/dev/sda1 : start=     2048, size=   409600, Id=83, bootable
/dev/sda2 : start=   411648, size= 31457280, Id=83
/dev/sda3 : start= 31868928, size= 33554432, Id=83
/dev/sda4 : start= 65423360, size=1184838255, Id= 5
/dev/sda5 : start= 65425408, size= 35651584, Id=82
/dev/sda6 : start=101079040, size=  4505600, Id=83
/dev/sda7 : start=105586688, size= 10485760, Id=83
/dev/sda8 : start=116074496, size= 29360128, Id=83
/dev/sda9 : start=145436672, size=   819200, Id=83
/dev/sda10: start=146257920, size=  1024000, Id=83
/dev/sda11: start=147283968, size=104857600, Id=83
/dev/sda12: start=252143616, size=998117999, Id=83

parted /dev/sda
GNU Parted 3.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
Model: ATA WDC WD6402AAEX-0 (scsi)
Disk /dev/sda: 640GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start   End     Size    Type      File system  Flags
 1      1049kB  211MB   210MB   primary                boot
 2      211MB   16.3GB  16.1GB  primary
 3      16.3GB  33.5GB  17.2GB  primary
 4      33.5GB  640GB   607GB   extended
 5      33.5GB  51.8GB  18.3GB  logical
 6      51.8GB  54.1GB  2307MB  logical
 7      54.1GB  59.4GB  5369MB  logical
 8      59.4GB  74.5GB  15.0GB  logical
 9      74.5GB  74.9GB  419MB   logical
10      74.9GB  75.4GB  524MB   logical
11      75.4GB  129GB   53.7GB  logical
12      129GB   640GB   511GB   logical

(parted) align-check minimal 1                                            
1 aligned
(parted) align-check optimal 1                                            
1 aligned
Se stejným výsledkem přes všechny partyšny, a to i přes extended.

cat /sys/block/sda/alignment_offset 
0
cat /sys/block/sda/queue/physical_block_size 
512
cat /sys/block/sda/queue/logical_block_size 
512
cat /sys/block/sda/queue/minimum_io_size 
512
cat /sys/block/sda/queue/optimal_io_size 
0

hdparm -I /dev/sda

/dev/sda:

ATA device, with non-removable media
        Model Number:       WDC WD6402AAEX-00Z3A0                   
        Firmware Revision:  05.01D05
        Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6
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: 1250261615
        Logical/Physical Sector size:           512 bytes