Hi,Xiao yes, succeed assemble RAID array with the latest upstream mdadm, # mdadm -A /dev/md0 /dev/sda /dev/sdb mdadm: /dev/md0 has been started with 2 drives. # mdadm -V mdadm - v4.4-55-g787cc1b6 - 2025-07-09 if not install the latest upstream mdadm, this issue will be hit in the upstream kernel git/axboe/linux-block.git， but not triggered in git/torvalds/linux.git， is there anything that need to be fixed in git/axboe/linux-block.git? Thanks， On Thu, Jul 24, 2025 at 3:18 PM Xiao Ni <xni@xxxxxxxxxx> wrote: > > Hi Changhui > > I guess you need to use the latest upstream mdadm. Could you have a > try with https://github.com/md-raid-utilities/mdadm/ > > Regards > Xiao > > On Thu, Jul 24, 2025 at 3:07 PM Changhui Zhong <czhong@xxxxxxxxxx> wrote: > > > > Hello, > > > > mdadm fails to initialize the sysfs interface while attempting to > > assemble a RAID array, > > please help check and let me know if you need any info/test, thanks. > > > > repo: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git > > branch: for-next > > INFO: HEAD of cloned kernel > > commit a8fa1731867273dd09125fd23cc1df4c33a7dcc3 > > Merge: b41d70c8f7bf 5ec9d26b78c4 > > Author: Jens Axboe <axboe@xxxxxxxxx> > > Date: Tue Jul 22 19:10:37 2025 -0600 > > > > Merge branch 'for-6.17/block' into for-next > > > > reproducer: > > # mdadm -CR /dev/md0 -l 1 -n 2 /dev/sdb /dev/sdc -e 1.0 > > mdadm: array /dev/md0 started. > > # mdadm -S /dev/md0 > > mdadm: stopped /dev/md0 > > # mdadm -A /dev/md0 /dev/sdb /dev/sdc > > mdadm: Unable to initialize sysfs > > # rpm -qa | grep mdadm > > mdadm-4.4-2.el10.x86_64 > > > > and not hit this issue with upstream kernel > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > > > > > Best Regards, > > Changhui > > >
