RE: Howto: implement AMD SB9xx RAID5 support in dmraid
Mark-Willem Jansen <[email protected]> Mon, 26 Mar 2012 14:34:02 +0200
| Newsgroups | gmane.linux.ataraid |
|---|---|
| Message-ID | <[email protected]> |
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Hi Phillip=2C
> I would advise using mdadm instead since it is much better supported and=
=20
> more reliable and feature complete.
>=20
Won't mdadm overwrite the metadata written to the disk by the BIOS/UEFI.
The RAID needs to be accessible from Windows and Linux. And I already use
the RAID under windows for my USER(would be /home for linux) directory.
> I believe it should just work unless they changed the format of the=20
> dmsetup table.
>=20
Could be true. Maybe just loading the appropriate module will work.
> dmraid -n doesn't already recognize it? You can find the existing known=
=20
> offsets in pdc.h.
>
I will run the command tonight when I am home. But as far as I can tell I
only get "found 0 sectors" for all the three disks. Maybe adding the offset
patch from ubuntu will do the trick.=20
> dmraid already understands pdc metadata.
>=20
Does this include all the info needed to setup a RAID-5. For instance there
are four different algorithm=2C left-asymmetric=2C left-symmetric=2C right-=
asymmetric
and right-symmetric that can be picked.
> Ubtunu 12.04 has switched to letting kpartx activate the partitions=20
> instead of dmraid=2C which supports GPT.
>=20
Another patch I can apply to the source tree. :-)
Kind regards=2C
Mark-Willem
=
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<div dir=3D"ltr">Hi Phillip=2C<br><br>>=3B I would advise using mdadm ins=
tead since it is much better supported and <br><div>>=3B more reliable an=
d feature complete.<br>>=3B <br><br>Won't mdadm overwrite the metadata wr=
itten to the disk by the BIOS/UEFI.<br>The RAID needs to be accessible from=
Windows and Linux. And I already use<br>the RAID under windows for my USER=
(would be /home for linux) directory.<br><br>>=3B I believe it should jus=
t work unless they changed the format of the <br>>=3B dmsetup table.<br>&=
gt=3B <br><br>Could be true. Maybe just loading the appropriate module will=
work.<br><br>>=3B dmraid -n doesn't already recognize it? You can find =
the existing known <br>>=3B offsets in pdc.h.<br>>=3B<br><br>I will run=
the command tonight when I am home. But as far as I can tell I<br>only get=
"found 0 sectors" for all the three disks. Maybe adding the offset<br>patc=
h from ubuntu will do the trick. <br><br>>=3B dmraid already understands =
pdc metadata.<br>>=3B <br><br>Does this include all the info needed to se=
tup a RAID-5. For instance there<br>are four different algorithm=2C left-as=
ymmetric=2C left-symmetric=2C right-asymmetric<br>and right-symmetric that =
can be picked.<br><br>>=3B Ubtunu 12.04 has switched to letting kpartx ac=
tivate the partitions <br>>=3B instead of dmraid=2C which supports GPT.<b=
r>>=3B <br><br>Another patch I can apply to the source tree. :-)<br><br>K=
ind regards=2C<br><br>Mark-Willem<br></div></div>
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