MD_32kB_SECT
((MD_128MB_SECT - MD_32kB_SECT - MD_4kB_SECT) * (1LL<<(BM_EXT_SHIFT-9)))
al_stripe_size_4k = MD_32kB_SECT/8;
if (al_size_4k < MD_32kB_SECT/8)
|| in_core->bm_offset != MD_4kB_SECT + MD_32kB_SECT
|| in_core->al_stripe_size_4k != MD_32kB_SECT/8)
if ((on_disk_al_sect & 7) || (on_disk_al_sect < MD_32kB_SECT))
if (al_size_k < MD_32kB_SECT/2) {