Hi, i have a problem with the relationship physical sectors/logical sectors

I read that for the optimal performace, the logical and physical sectors must be equal.

Instead in my oracle server:

[root@server1 ~]# fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes

255 heads, 63 sectors/track, 121601 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes     <------------ IS OK

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000466aa

Device Boot Start End      Blocks   Id  System

/dev/sda1 * 1 64      512000   83  Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 64       61256 491520000   8e  Linux LVM

/dev/sda3 61256      107149   368640000 8e  Linux LVM

/dev/sda4 107149      121535 115551232    5  Extended

/dev/sda5 107150      120153   104448000 8e  Linux LVM

/dev/sda6 120153      121428 10240000   8e  Linux LVM

Disk /dev/sdb: 240.1 GB, 240057409536 bytes

81 heads, 63 sectors/track, 91879 cylinders

Units = cylinders of 5103 * 512 = 2612736 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes     <-----------IS WRONG? NON OPTIMAL?

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk identifier: 0x015a89c6

Device Boot Start End      Blocks   Id  System

/dev/sdb1 1       91880   234430040 83  Linux

How to can change this parameter?

The swap and / partitions are on sda, while on sdb are the REDOLOG, here I create only the partition, but I have not formatted, the management is using ASM.

Thanks!