On 2016-09-13 04:38, Timofey Titovets wrote:
https://btrfs.wiki.kernel.org/index.php/Status
I suggest to mark RAID1/10 as 'mostly ok'
as on btrfs RAID1/10 is safe to data, but not for application that uses it.
i.e. it not hide I/O error even if it's can be masked.
https://www.spinics.net/lists/linux-btrfs/msg56739.html
/* Retest it with upstream 4.7.2 - not fixed */
This doesn't match with what my own testing indicates at least for raid1
mode. I run similar tests myself every time a new stable kernel version
comes out (but only on the most recent stable version) once I get my own
patches re-based onto it, and I haven't seen issues like this in any of
the 4.7 kernels, and don't recall any issues like this in any of the 4.6
kernels. In fact, I've actually dealt with systems with failing disks
using BTRFS raid1 mode, including one at work just yesterday where the
SATA cable had worked loose from vibrations and was causing significant
data corruption. It survived just fine, as have all the other systems
I've dealt with which had hardware issues while running BTRFS in raid1 mode.
The indicated behavior would be consistent with issues seen sometimes
when using compression however, but the OP in the linked message made no
indication of there being any in-line compression involved.
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