--- On Thu, 10/14/10, Iordan Iordanov <iordan@xxxxxxxxxxxxxxx> wrote: > Have you considered enabling a write-intent bitmap on your > array? This way, at least your rebuild will take seconds > instead of 10 hours. Write intent bitmap support for RAID10 > was introduced in 2005, and hopefully CentOS 5.2 supports > it. I've never heard of that - sounds fantastic. Does it have any performance penalties during heavy writes? > We have iscsi targets for drives in our array, and we make > sure that we've logged into all 30 of our drives before we > continue to enable mdadm (we literally count the number of > iscsi sessions open). You can try counting the number of > block devices present (in /dev/block) that match a certain > pattern, or perhaps your fiber channel driver offers an even > more convenient facility in /dev. Are you doing the mdadm startup in rc.local, or in the initrd, or...? Andrew -- 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
