Package: debian-installer Version: used in Debian GNU/Linux Jessie-DI-rc1 "Jessie" - Official RC amd64 CD Binary-1 20150109-01:06 image
My UEFI motherboard has an Intel RST chip on it, which I use to set up a pair of SSD drives in a RAID-0 array. I have successfully installed Debian Wheezy on this array in the past, using an expert set up and some manual configuration during the install. I tried repeating that process using the Jessie RC1 installer, and it failed. For Wheezy, I used the image Debian GNU/Linux 7.8.0 "Wheezy" - Official amd64 CD Binary-1 20150110-14:43 For Jessie, I used the image Debian GNU/Linux Jessie-DI-rc1 "Jessie" - Official RC amd64 CD Binary-1 20150109-01:06 Both images were written to a USB stick, and both installers were booted in UEFI mode. To do the installation, I run through the first few steps of the expert install, up to and including detecting disks. At that point, I switch to the console (Alt-F2), to assemble and start the software arrays. First I load the kernel modules for RAID, which also loads the md_mod module, and then I execute mdadm to assemble and start the arrays. When I do this in Wheezy, it successfully builds the arrays and starts them: ~ # modprobe raid0 ~ # mdadm --assemble --scan --verbose mdadm: looking for devices for further assembly mdadm: /dev/sdb is identified as a member of /dev/md/imsm0, slot -1. mdadm: /dev/sda is identified as a member of /dev/md/imsm0, slot -1. mdadm: added /dev/sda to /dev/md/imsm0 as -1 mdadm: added /dev/sdb to /dev/md/imsm0 as -1 mdadm: Container /dev/md/imsm0 has been assembled with 2 drives mdadm: looking in container /dev/md127 mdadm: found match on member /md127/0 in /dev/md127 mdadm: Started /dev/md/Boot_0 with 2 devices However, following the same steps in Jessie, mdadm fails to start the array because of some file permission problem: ~ # modprobe raid0 ~ # mdadm --assemble --scan --verbose mdadm: looking for devices for further assembly mdadm: /dev/sdb is identified as a member of /dev/md/imsm0, slot -1. mdadm: /dev/sda is identified as a member of /dev/md/imsm0, slot -1. mdadm: added /dev/sda to /dev/md/imsm0 as -1 mdadm: added /dev/sdb to /dev/md/imsm0 as -1 mdadm: Container /dev/md/imsm0 has been assembled with 2 drives mdadm: cannot open device /dev/md/imsm0: No such file or directory However, following the same steps in Jessie, mdadm fails to start the array because of some file permission problem: Consequently, while I can proceed to the next installer step in Wheezy, because the system sees the RAID array and I can create partitions on it, in Jessie, the array is never started, no /dev/md/ device is created, and I cannot continue.
