SAN Performance

I have recently virtualized  win 2k3 r2 sp2 64 bit box to hp proliant dl38p1 g8 vmware esxi 5.5 host.  The db in question is sql 2005 64bit.  I attached via iscsi dell m3620i powervault san.  The virtual volume on san is made up of ssd drives with raid 10 configuration.

I moved one of the db's to san lun.  

When I ran sqlio with 20gb file.

"sqlio -kW -t8 -s120 -o8 -frandom -b8 -BH -LS -Fparam.txt" ~ 60mb/s 

"sqlio -kR -t8 -s120 -o8 -frandom -b8 -BH -LS -Fparam.txt" ~ 100mb/s 

 These numbers are better than bare metal  by order of magnitude.

When I run a full table scan query ie..  select * from products,  the bandwidth is ~ 12mb/s

Would anyone know why?

Thanks in advance