getblk
bp = getblk(pmp->pm_devvp,
bp = getblk(DETOV(dep),
bpn = getblk(pmp->pm_devvp, fatbn, bp->b_bcount,
struct buf* getblk(struct vnode* vp, daddr_t blkno, int size, int slpflag, int slptimeo, int flags);
buf* newData = getblk(fatVolume->pm_devvp, startBlock, fatVolume->pm_bpcluster, 0, 0, 0);