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) David -- 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
