Date: Fri, 08 May 2009 21:55:28 +0300 From: =?ISO-8859-1?Q?T=F6r=F6k_Edwin?= <edwintorok@gmail.com> To: freebsd-geom@freebsd.org Subject: compatibility with Linux software RAID? Message-ID: <4A048020.3070709@gmail.com>
next in thread | raw e-mail | index | archive | help
Hi,
Apologies if this has been answered before, but is there a way to access
(even if just read-only) RAID arrays created by Linux software raid
tools (mdadm)?
I want to test the new superpages support in FreeBSD 7.2, and do some
performance comparisons with Linux, problem is all my data is on a
RAID10 array.
I have this RAID10 array (according to /proc/mdstat Linux):
md4 : active raid10 sda3[0] sdc3[5] sdf3[4] sdd3[3] sde3[2] sdb3[1]
2159617728 blocks 64K chunks 2 near-copies [6/6] [UUUUUU]
See here for how Linux's md driver lays out data:
http://en.wikipedia.org/wiki/Non-standard_RAID_levels#Linux_MD_RAID_10
Does FreeBSD support reading this RAID format?
Alternatively I also have a RAID1 array on same disks:
md3 : active raid1 sda1[0] sdd1[5] sde1[4] sdf1[3] sdb1[2] sdc1[1]
9767424 blocks [6/6] [UUUUUU]
I see that FreeBSD supports RAID1, but will it read in parallel from all
6 disks?
(if not I can just mount one of them readonly)
Also if gmirror does support the above, is there a way to tell it to
treat the disks as readonly?
Also is there support for recognizing Linux RAID superblocks (partition
type 0xf Linux raid autodetect)?
Best regards,
--Edwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4A048020.3070709>