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Hi, I know that LUNs are parts of some disks which will be presented to a host. For example in a RAID 5 (4+1) a LUNs will be sectors from the five disks I hope this is right. But there is something I can't understand which is how many LUNs shall we create and how can I see the relations between LUNs and Disks. For example in this SPcollect output are the LUNs (50-->59) the ones that belongs to disks (1.1.4-->1.1.0) or those (4039-4030) ? What does FLU and ALU stand for ? and is there a way to see the LUNs that belongs to a RG through unisphere ?  MLU TPID ALU   FLU RGRP  ENCTYPE   TYPE   PRIV  LD   CAPACITY CACHE DEFOWN   STATE           NAVIFRUS -         2    4039   50    120      SAS          RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0    -       2    4038   51    120      SAS          RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -       2    4037   52    120      SAS          RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -       2    4036   53    120     SAS           RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -      2    4035    54    120     SAS           RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -      2    4034    55   120      SAS           RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -      2    4033    56    120     SAS           RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -      2    4032    57    120     SAS           RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -      2    4031    58   120     SAS            RAID-5   Y     PLU   214.7 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0   -      2    4030    59    120    SAS            RAID-5   Y     PLU   213.8 GB   RW-     SP-A           ENA      1.1.4 1.1.3 1.1.2 1.1.1 1.1.0
relation between disks and Luns