▁system ▁standard ▁( option ally ▁Win CE ▁activ ated ▁function , ▁not ▁supported ▁in ▁Windows ▁Des ktop / Server ▁versions ). ▁ ▁B ound ary ▁alignment ▁offset ▁for ▁the ▁F AT ▁table . ▁ ▁B ound ary ▁alignment ▁offset ▁for ▁the ▁data ▁region . ▁ ▁Pro vision ▁for ▁O EM - defin able ▁parameters ▁to ▁custom ize ▁the ▁file ▁system ▁for ▁specific ▁device ▁characteristics . ▁ ▁Valid ▁Data ▁L ength ▁( VD L ): ▁through ▁the ▁use ▁of ▁two ▁distinct ▁lengths ▁fields , ▁one ▁for ▁" alloc ated ▁space " ▁and ▁the ▁other ▁for ▁" valid ▁data ", ▁ex F AT ▁can ▁pre alloc ate ▁a ▁file ▁without ▁le aking ▁data ▁that ▁was ▁previously ▁on - disk . ▁ ▁Cl uster ▁size ▁up ▁to ▁ 3 2 ▁Mi B . ▁ ▁Met adata ▁integrity ▁with ▁check sum s . ▁ ▁Template ▁based ▁metadata ▁structures . ▁ ▁Rem oval ▁of ▁the ▁physical ▁ ▁and ▁ ▁directory ▁entries ▁that ▁appear ▁in ▁sub direct ories . ▁ ▁ex F AT ▁is ▁not ▁limited ▁to ▁short ▁( 8 . 3 ▁format ) ▁fil en ames . ▁ ▁Windows ▁XP ▁requires ▁update ▁K B 9 5 5 7 0 4 ▁to ▁be ▁installed ▁and ▁Windows ▁V ista ▁requires ▁its ▁SP 1 ▁or ▁SP 2 ▁be ▁installed . ▁Windows ▁V ista ▁is ▁unable ▁to ▁use ▁ex F AT ▁drives ▁for ▁Re ady Bo ost . ▁Windows ▁ 7 ▁removes ▁this ▁limitation , ▁en abling ▁Re ady Bo ost ▁c aches ▁larger ▁than ▁ 4   Gi B . ▁Windows