Has anybody here tried using a >16TB RAID0? When I recently got my hands on some 2TB drives, I decided to check out the current status of large EXT4 filesystems on 32-bit systems. I created a ~17TB RAID0, and immediately had problems. Andreas Dilger advised me to try out his llverdev utility (kindly hosted by Val Aurora at http://valhenson.livejournal.com/38933.html) to verify that the underlying device is functioning properly. Running "llverdev -p -v /dev/md0" on a >16TB array resulted in a runaway process, with llverdev and pdflush each eating up 100% of the CPU time on my two cores, but not advancing the write offset. The process did not appear to be interruptable after more than 30 minutes, and I had to do a hard shutdown. A RAID0 just under 16TB ran through llverdev without a hitch. I'm in the process of running a RAID5 array through the same test now, but it's already past the point where the RAID0 failed; so if it does fail, it'll likely be due to a different cause. Does anyone have any ideas? Has this never been done before? I'm running debian on a 2.6.30.1 kernel. -Justin -- 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
