Hi AnNan, See my patch: https://review.gerrithub.io/385341 From: SPDK [mailto:spdk-bounces@lists.01.org] On Behalf Of Annan Chang �安男 Sent: Saturday, October 14, 2017 4:41 PM To: spdk(a)lists.01.org Subject: [SPDK] Question about create a simple RAID1 in SPDK Hello all, I am planning to create a simple RAID1 in spdk. My original idea is to implement a new spdk bdev device that contain two physical devices. So I looked up the code of AIO and nvme bdev device. But I found that writing a new spdk bdev device that contain two physical nvme devices is difficult for me because of I am not familiar with nvme’s user space driver. I just found in the maillist, maybe use “vbdev” architecture is just right. But I cannot find any example of vbdev. Does anybody can give me the advice how to write a vbdev device the contain of two bdev nvme device ? Thank you very much. -- AnNan, Chang