From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <199901192207.QAA08969@wolfram.com> To: "Ian K. Erickson" cc: linuxppc-user@lists.linuxppc.org, linuxppc-dev@lists.linuxppc.org Subject: Re: 15 partitions max prob revisited In-reply-to: References: Date: Tue, 19 Jan 1999 16:07:52 -0600 From: Brian Downing Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Tue, 19 Jan 1999 11:51:15 -0800 (PST), "Ian K. Erickson" writes: > On Tue, 19 Jan 1999, Brad Boyer wrote: > > No, this is a Linux problem. You cannot have more than 15 partitions > > on a drive because there are not device numbers allocated for anything > > higher than partition number 15. > > Not that know anything about it, but out of curiosity: couldn't you use > mknod to create >15 [hs]da's? Or could you recompile the kernal to allow > them? No. It works like this: brw-rw---- 1 root wheel 8, 0 Sep 12 1994 /dev/sda brw-rw---- 1 root wheel 8, 1 Sep 12 1994 /dev/sda1 brw-rw---- 1 root wheel 8, 2 Sep 12 1994 /dev/sda2 ... brw-rw---- 1 root wheel 8, 14 Sep 12 1994 /dev/sda14 brw-rw---- 1 root wheel 8, 15 Sep 12 1994 /dev/sda15 ...so partition 16 would be major 8 minor 16, except: brw-rw---- 1 root wheel 8, 16 Sep 12 1994 /dev/sdb brw-rw---- 1 root wheel 8, 17 Sep 12 1994 /dev/sdb1 brw-rw---- 1 root wheel 8, 18 Sep 12 1994 /dev/sdb2 If we had more device nodes to play with, we could have devices that work per SCSI id instead of the dynamically allocated ones we have now. It's a huge pain when you remove a disk on a server and sdf-sdk fall down to sde-sdj. Or worse -- when a faulty disk falls off the chain, and when the (unsupervised) machine reboots -- everything is mounted in the wrong place! :-) -bcd -- ** Brian Downing ** UNIX Systems Administrator ** bdowning@wolfram.com [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]] [[ the message 'unsubscribe' to linuxppc-dev-request@lists.linuxppc.org ]]