Sanity check - need a second pair of eyes ;-)

["Carlos E. R." <robin.listas@telefonica.net>]

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Hi,

I'm trying to create an XFS image to be written on a Blue Ray disk, 
encrypted. I'm told that DVDs have a sector size of 2 KiB, thus it is 
beter to tell the formatting utility of that, because when creating the 
image file it is on a hard disk where sector size is 512B.

Basic procedure:

truncate -s 50050629632 image_1_50.img
losetup -f image_1_50.img
cryptsetup luksFormat --type luks2 --label blueray50img /dev/loop0
cryptsetup luksOpen /dev/loop0 cr_nombre


So now I have the image file loop mounted on /dev/mapper/cr_nombre, and I 
do (this is the step I ask about):

Telcontar:/home_aux/BLUERAY_OPS # mkfs.xfs -L ANameUnseen -b size=2048 
/dev/mapper/cr_nombre
meta-data=/dev/mapper/cr_nombre  isize=512    agcount=4, agsize=6109184 blks
          =                       sectsz=512   attr=2, projid32bit=1
          =                       crc=1        finobt=1, sparse=0, rmapbt=0
          =                       reflink=0
data     =                       bsize=2048   blocks=24436736, imaxpct=25
          =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=2048   blocks=11932, version=2
          =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
Telcontar:/home_aux/BLUERAY_OPS #


Is that the correct command line to achieve written sectors of 2 KiB?

I ask because I see isize=512 and sectsz=512 and I wonder.


- -- 
Cheers,
        Carlos E. R.
        (from openSUSE 15.0 x86_64 at Telcontar)
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