dmraid: unable to remove ddf1 metadata with CRC error

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Hello,

I hope it's a good place to submit problem with dmraid utility, maybe at
least Mr Heinz Mauelshagen reads this mailing list?

I had a bunch of 1T disks with following problem:

ddf1: physical drives with CRC 7FFEB6, expected FFFFFFFF on /dev/sdf
ERROR: ddf1: Cannot find physical drive description on /dev/sdf!
ERROR: ddf1: setting up RAID device /dev/sdf

>From my experience and from googling similar problems breaking
CentOS/RedHat installation , I suspected removing metadata with dmraid -E
might help, but it failed too:

ERROR: ddf1: seeking device "/dev/sdc" to 512104901378048
ERROR: writing metadata to /dev/sdc, offset 1000204885504 sectors, size 0
bytes returned 0
ERROR: erasing ondisk metadata on /dev/sdc

My coworker noticced, that dmraid tries to seek to position
512*1000204885504, which might be a bug caused by treating byte offset as
number of sectors.

Anyway, I manually zeroed those buggy metadata with dd, but I used dmraid
dump metadata feature to save them in case anybody wishes to see them.

Regards,
Robert.

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<div dir=3D"ltr"><div><div><div><div><div><div>Hello,<br><br></div>I hope i=
t&#39;s a good place to submit problem with dmraid utility, maybe at least =
Mr Heinz Mauelshagen reads this mailing list?<br><br></div>I had a bunch of=
 1T disks with following problem:<br><br>ddf1: physical drives with CRC 7FF=
EB6, expected FFFFFFFF on /dev/sdf<br>ERROR: ddf1: Cannot find physical dri=
ve description on /dev/sdf!<br>ERROR: ddf1: setting up RAID device /dev/sdf=
<br><br></div>From my experience and from googling similar problems breakin=
g CentOS/RedHat installation , I suspected removing metadata with dmraid -E=
 might help, but it failed too:<br><br>ERROR: ddf1: seeking device &quot;/d=
ev/sdc&quot; to 512104901378048<br>ERROR: writing metadata to /dev/sdc, off=
set 1000204885504 sectors, size 0 bytes returned 0<br>ERROR: erasing ondisk=
 metadata on /dev/sdc<br><br></div>My coworker noticced, that dmraid tries =
to seek to position 512*1000204885504, which might be a bug caused by treat=
ing byte offset as number of sectors.<br><br></div>Anyway, I manually zeroe=
d those buggy metadata with dd, but I used dmraid dump metadata feature to =
save them in case anybody wishes to see them.<br><br></div><div>Regards,<br=
></div><div>Robert.<br><br></div></div>

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