Control: tag -1 + moreinfo Control: severity -1 wishlist 07.02.2014 11:21, Michael Prokop wrote: > Package: mdadm > Version: 3.3-2 > Severity: normal > > Quoting from kernel's Documentation/md.txt: > > ,---- [ https://www.kernel.org/doc/Documentation/md.txt ] > | Boot time autodetection of RAID arrays > | -------------------------------------- > | > | When md is compiled into the kernel (not as module), partitions of > | type 0xfd are scanned and automatically assembled into RAID arrays. > | This autodetection may be suppressed with the kernel parameter > | "raid=noautodetect". As of kernel 2.6.9, only drives with a type 0 > | superblock can be autodetected and run at boot time. > `---- > > The udev rules file /lib/udev/rules.d/64-md-raid-assembly.rules > shipped by mdadm ignores that kernel parameter and tries to assemble > mdadm RAIDs without honoring the raid=noautodetect setting. > > It would be nice if there would be some way (maybe just checking for > raid=noautodetect in /proc/cmdline?) to disable auto assembly > without having to manually delete/override the udev file. I don't think that using raid=noautodetect is a good way of doing this. It is for the really obsolete in-kernel array assembly, and it is described as such in the documentation you quoted above. In debian we have another parameter in initrd, -- mdassemble=all|none|list which is copied from a debconf question. Maybe this one is better suited for this need, at least it is more flexible. It is sort of trivial to get this parameter from kernel command line in the initrd script. But. It is all about early-boot environment. None of these parameters, at my point of view, should be considered after pre-boot is done and we're in the main system. If you're talking about main udev rules of mdadm, I disagree, there should be entirely separate option, if at all. What is your usage case? What are you trying to achieve? Note that we're moving (very slow) towards assembling everything using those rules, including your boot arrays, so if you disable those, your system wont boot anymore. Adding linux-raid list to Cc. Please describe your situation in more detail, and maybe together we will be able to come to some solution. Marking your bugreport as a wishlist for now in debian. Thanks, /mjt -- 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
