On Fri, 1 Aug 2008, David Greaves wrote:
Neil Brown wrote:
Hence messages like:
Filesystem "md0": Disabling barriers, not supported by the underlying device
A strange message to get as md/RAID1 *does* support barriers when all the
underlying devices do (since the mid-teens of 2.6 I think).
You specifically mention raid1 - which, granted, is what the OP asked about - is
md raid1 different from other raid levels wrt barriers?
Also the above message comes from XFS on a raid5 on 2.6.18 - Xen :(
I thought I'd seen this on raid5 on 2.6.2[456] too though (no access to check
right now)
I get this message:
JBD: barrier-based sync failed on md7 - disabling barriers
That is with 2.6.26 and ext4. But this is with RAID1+0 and md7 is the
RAID0 part.
Holger
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
