disklerdeki sektör büyüklüğü ne olmalı?

Aşağıdaki diskte, işletim sistemi tarafında max_sector_kb ne olmalı?

root@e8470p:~# hdparm  -I /dev/sdb

/dev/sdb:

ATA device, with non-removable media
    Model Number:       ST1000LM014-1EJ164                     
    Serial Number:      W381VN7C
    Firmware Revision:  SM16   
    Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
    Used: unknown (minor revision code 0x001f)
    Supported: 9 8 7 6 5
    Likely used: 9
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
    Logical  Sector size:                   512 bytes
    Physical Sector size:                  4096 bytes
    Logical Sector-0 offset:                  0 bytes
    device size with M = 1024*1024:      953869 MBytes
    device size with M = 1000*1000:     1000204 MBytes (1000 GB)

 # cat /sys/block/sdb/queue/max_sectors_kb
512


# cat /sys/block/sdb/queue/max_hw_sectors_kb
32767


Aşağıdaki gibi boyutları değiştiresek nasıl olur?
echo 4096 > /sys/block/sdb/queue/max_sectors_kb