On Tue, 2 Mar 2010 19:15:04 -0600 (CST) Robert Minvielle <robert@xxxxxxxxxx> wrote: > > I am trying to setup a new raid array on a debian box, and I have not run into > this problem before. I could not find a mdadm list, so I will ask here. If this > is totally off topic, please disregard. Perfectly on-topic. > > > I am attempting to setup a raid 6 array, but this is failing so I backing down > to a no-frills raid 5 array. The system is Debian5, stock kernel, stock everything. > The mdadm is the stock debian, pulled with apt-get, version 2.6.7. > The machine in question has one IDE drive for linux, and 45 SATA drives. Debian > sees all of the drives, and I have fdisked all of them with one partition of type > fd (Linux autodetect raid). fdisk -l /dev/sd[a-z] /dev/sdaa[a-s] shows them all > with no problems. Using old software on new hardware.... When using Debian, I would recommend the -testing version for new hardware.... (not that I am prepared to back-up that recommendation with support). However I suspect Debian5 should be able to be made to work with your setup. > > The issue is that when I do a > > mdadm --create /dev/md0 --level=5 --raid-devices=45 /dev/sd[a-z]1 /dev/sda[a-s]1 > > to create a raid array with no spares, all defaults, it returns with > > invalid number of raid devices. The default metadata layout has a maximum of 28 devices. If you want more, add --metadata=1.0 You won't be able to use in-kernel autodetect, but you shouldn't need to with Debian, even at that vintage. > > I have searched the web to no avail. --verbose does not increase verbosity. There > are no debug switches (that I know of) to mdadm. log files show nothing. Leaving off > --raid-devices=45 does nothing. Changing the number of devices just for fun does > nothing. (45,44,43,2,whatever). I am not sure if this is a problem with this version > in debian, the number of drives that I have, or the setup. I have done this before > (with a few less drives) with no problems. I'm surprised it didn't work with '2', or did you mean "42" ? NeilBrown > > Any suggestions would be appreciated. > > Thanks. > > > > > -- > 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 -- 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
