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Message-ID: <c6b1100b0906080817q5378f512s8ce03727a362e8c5@mail.gmail.com> Date: Mon, 8 Jun 2009 16:17:37 +0100 From: Chris Clayton <chris2553@...glemail.com> To: James Bottomley <James.Bottomley@...senpartnership.com> Cc: NeilBrown <neilb@...e.de>, Jaswinder Singh Rajput <jaswinder@...nel.org>, linux-kernel@...r.kernel.org, scsi <linux-scsi@...r.kernel.org>, Tejun Heo <tj@...nel.org>, Arjan van de Ven <arjan@...radead.org> Subject: Re: 2.6.30-rc8 Oops whilst booting Sorry James, I forgot to ask... 2009/6/8 James Bottomley <James.Bottomley@...senpartnership.com>: > On Mon, 2009-06-08 at 09:08 +0100, Chris Clayton wrote: >> Hi Neil, >> >> Thanks for the reply. >> >> 2009/6/7 NeilBrown <neilb@...e.de>: >> > On Mon, June 8, 2009 8:31 am, Jaswinder Singh Rajput wrote: >> >> On Sun, 2009-06-07 at 19:38 +0100, Chris Clayton wrote: >> >>> 2009/6/7 Jaswinder Singh Ra >> >>> >> > http://img231.imageshack.us/img231/8931/dscn0610.jpg >> > >> > This message says that it found a vfat filesystem on 8:3x (I cannot see >> > what digit should be 'x'). That is probably sdc1 or sdc2. Maybe even >> > sdc6 or sdc7. >> > However the vfat filesystem didn't have /sbin/init. >> > >> >> >>> http://img99.imageshack.us/my.php?image=dscn0617b.jpg >> > >> > This one says it couldn't find anything at 8,22, which I think >> > should be sdb6. >> > It also shows that you have and sdc6, but sdb only goes up to sdb3. >> > >> > So it seems that your disk drives have changed name - not a wholely >> > unexpected event these days. >> > >> > We now need answers to questions like: >> > - what device do you expect the root filesystem to be on >> > - how is the kernel being told this? Maybe it is hard coded >> > into your initrd. Knowing which distro and what /etc/fstab >> > says might help (though it wouldn't help me, I'm just about out >> > of my depth at this point) >> > Maybe if you changed /etc/fstab to mount by uuid instead of hardcoding >> > e.g. /etc/sdb3, and then run "mkinitramfs" or whatever, it might work. >> > >> >> Yes, I've just been looking at the photographs of the panics again and >> I've noticed that two of my discs are being detected in the "wrong >> order". There are three HDDS. The first, /dev/sda, is the master on >> the first IDE port and contains sda1..sda7. The second, normally >> /dev/sdb, is the slave on that port and contains sdb1..sdb6. The >> third, normally /dev/sdc, is attached to the first SATA port and >> contains sdc1..sdc3. The second photograph I posted shows that sdb and >> sdc have been reversed. The first partition on the disc that is >> normally /dev/sdb does indeed have a FAT32 filesystem in the first >> partition. >> >> By the way, I should have said that in between the panics that the two >> photographs show, I copied contents of /dev/sdc1, which I normally >> boot from, to /dev/sdb6, so that I minimised the risk to sdc1 in the >> reboot festival that bisecting would involve. I also, of course, >> changed the name of the root partition that is passed to the kernel by >> GRUB and amended /etc/fstab on /dev/sdb6. That's why the partitions >> shown in the photographs seem inconsistent. Sorry I forgot to mention >> that - I really shouldn't do these things late at night :-). > > Actually, you can save yourself a lot of pain by mounting by label > instead ... that way both grub and fstab will find your root disc even > if it has swapped order. > Would I be right in assuming from this that "out-of-order" detection is expected behaviour? If so, I'll fix up my system and shut up :-) I suspect I may not be the only person on the planet who specifies the root filesystem in this way, though. Thanks >> As I indicate above, when booting the partition I have set up to do >> this bisecting, I expect the root filesystem to be on /dev/hdb6. As I >> also indicate, this information is passed to the kernel through GRUB's >> /boot/grub/menu.lst. The kernel is configured specifically for my >> system and the drivers needed to boot the system are built in to the >> kernel, so I don't use an initrd. IIRC, that's the way Slackware is >> installed today, except, of course, it's a big fat kernel with all >> drivers needed to boot any system built in. I could be wrong on that >> though, it's a while since I installed > > The fact that a slave on the first channel is detected after the SATA > indicates a problem with async probing. What are the two drivers for > these? > > James > > > -- No, Sir; there is nothing which has yet been contrived by man, by which so much happiness is produced as by a good tavern or inn - Doctor Samuel Johnson -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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