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Message-ID: <002701ca3d9b$53250240$f96f06c0$@net.au> Date: Fri, 25 Sep 2009 14:47:45 +1000 From: "Ben Ryan" <ben@...ulse.net.au> To: <linux-kernel@...r.kernel.org> Subject: USB HDD boot panic (2.6.31) I've a question regarding boot from USB-attached IDE HDD under 2.6.31 (slackware/lilo). Searches haven't shed much light on status or resolutions. Booting from this device throws: VFS: Cannot open root device "sda1" or unknown-block(0,0) Please append a correct "root=" boot option; here are the available partitions: . Kernel panic - not syncing: VFS: Unable to mount root fs on unknown block(0,) I notice that there's no /dev/sd(x) devices listed as possible roots in the error. I've tried a kernel build with all relevant drivers inbuilt (not modules). Tested on multiple machines with same result. This issue seems to have some history, earlier kernels had patches written for genhd.c (but I lack the skills to port them forward). Discussion here: http://lkml.indiana.edu/hypermail/linux/kernel/0405.0/0224.html >From what I can gather the USB drivers aren't finished initialising before the disks are enumerated and mapped to /dev. Is this a known, current issue? Does anyone have a patch that can help? If so, why isn't it mainlined? (Please CC responses!) Thanks Ben -- 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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