Ceph osd prepare

ceph-disk prepare --cluster ceph --cluster-uuid 40f26838-4760-4b10-a65c-b9c1cd671f2f --fs-type xfs /dev/sdb /dev/sdb1
WARNING:ceph-disk:OSD will not be hot-swappable if journal is not the same device as the osd data
Setting name!
partNum is 0
REALLY setting name!
The operation has completed successfully.
can't get size of data subvolume
Usage: mkfs.xfs
/* blocksize */     [-b log=n|size=num]
/* metadata */      [-m crc=0|1,finobt=0|1]
/* data subvol */   [-d agcount=n,agsize=n,file,name=xxx,size=num,
                (sunit=value,swidth=value|su=num,sw=num|noalign),
                sectlog=n|sectsize=num
/* force overwrite */   [-f]
/* inode size */    [-i log=n|perblock=n|size=num,maxpct=n,attr=0|1|2,
                projid32bit=0|1]
/* no discard */    [-K]
/* log subvol */    [-l agnum=n,internal,size=num,logdev=xxx,version=n
                sunit=value|su=num,sectlog=n|sectsize=num,
                lazy-count=0|1]
/* label */     [-L label (maximum 12 characters)]
/* naming */        [-n log=n|size=num,version=2|ci,ftype=0|1]
/* no-op info only */   [-N]
/* prototype file */    [-p fname]
/* quiet */     [-q]
/* realtime subvol */   [-r extsize=num,size=num,rtdev=xxx]
/* sectorsize */    [-s log=n|size=num]
/* version */       [-V]
            devicename
<devicename> is required unless -d name=xxx is given.
<num> is xxx (bytes), xxxs (sectors), xxxb (fs blocks), xxxk (xxx KiB),
      xxxm (xxx MiB), xxxg (xxx GiB), xxxt (xxx TiB) or xxxp (xxx PiB).
<value> is xxx (512 byte blocks).
ceph-disk: Error: Command '['/sbin/mkfs', '-t', 'xfs', '-f', '-i', 'size=2048', '--', '/dev/sdb1']' returned non-zero exit status 1