On 10/16/19 9:42 PM, Zygo Blaxell wrote: > > For raid5 I'd choose btrfs -draid5 -mraid1 over mdadm raid5 > sometimes--even with the write hole, I'd expect smaller average data > losses than mdadm raid5 + write hole mitigation due to the way disk > failure modes are distributed.
What about the write hole and RAID-1? I understand the write hole is most commonly associated with RAID-5, but it is also a problem with other RAID levels. You would need to scrub after a power failure to be sure that no meta data gets corrupted even with RAID-1. Otherwise you might still have inconsistent copies and the problem may only become apparent when one drive fails. Can we be certain that scrubbing is always able to fix such inconsistencies with RAID-1? Regards, Edmund -- *Liland IT GmbH* Ferlach ● Wien ● München Tel: +43 463 220111 Tel: +49 89 458 15 940 off...@liland.com https://Liland.com <https://Liland.com> Copyright © 2019 Liland IT GmbH Diese Mail enthaelt vertrauliche und/oder rechtlich geschuetzte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese Email irrtuemlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. This email may contain confidential and/or privileged information. If you are not the intended recipient (or have received this email in error) please notify the sender immediately and destroy this email. Any unauthorised copying, disclosure or distribution of the material in this email is strictly forbidden.
