From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Helmut Hullen" Subject: Re: INSTALL hint: create device btrfs-control Date: 04 Aug 2011 22:13:00 +0200 Message-ID: References: <20110804173548.GA8970@carfax.org.uk> Reply-To: helmut@hullen.de Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <20110804173548.GA8970@carfax.org.uk> List-ID: Hallo, Hugo, Du meintest am 04.08.11: > What are the symptoms of not having the device node? (i.e. how > would I diagnose this particular problem?) The days get shorter and shorter ... running btrfs device scan produces something like ... failed to read /dev/hdc failed to read /dev/hdc8 failed to read /dev/lmscd failed to read /dev/sdc1 failed to read /dev/sdb4 failed to open /dev/btrfs-control skipping device registration failed to read /dev/sdd8 failed to read /dev/hdc9 failed to read /dev/sdf8 ... a lot of error messages for not existing devices and 1 error messages on behalf of "btrfs-control". My "/dev" directory has worked (without "udev") without any problem for more than 10 years, it contains (has contained) a lot of entries for nearly every case of disk. Therefore i had started with btrfs device scan 2>/dev/null and that deleted the "btrfs-control" error message too. And btrfs device scan 2>&1 | grep -v 'failed to' didn't help too. btrfs-show doesn't need "/dev/btrfs-control", it shows the existing btrfs partition(s). If I remember correct: mounting works, writing works, reading works. And adding another partition works. But there are strange messages when I try to resize or delete. I'll try to reproduce these messages ... Viele Gruesse! Helmut