LUN created using SDU is reported as misaligned when used with Oracle databases

From the NetApp storage system console, the lun show –v command reports the LUN to be misaligned:

netappstorage> lun show -v

/vol/orabackup_precg1asdl01/orabackup/orabackup_precg1asdl01_new.lun

/vol/orabackup_precg1asdl01/orabackup/orabackup_precg1asdl01_new

.lun 400.0g (429523992576) (r/w, online, mapped)

Serial#: HndnCZmKv33k

Share: none

Space Reservation: disabled

Multiprotocol Type: linux

Maps: precg1asdl01=0

Occupied Size: 6.5g (6926499840)

Creation Time: Mon Sep 10 14:25:43 MDT 2012

Alignment: misaligned

Cluster Shared Volume Information: 0x0

LUN created with the correct OS type setting (Linux) uses the fdisk -u –l /dev/sdxx command from the UNIX host to get this information.

Example output:

Disk /dev/sdbh: 429.5 GB, 429523992576 bytes

255 heads, 63 sectors/track, 52219 cylinders, total 838914048 sectors

Units = sectors of 1 * 512 = 512 bytes

Device Boot Start End Blocks Id System

/dev/sdbh1 8 838898234 419449113+ 83 Linux