FreeMan Posted February 22, 2023 Share Posted February 22, 2023 I have a feeling that this is a sign that I need to retire my old backup server... I'm getting a kernel panic on boot on the machine: Quote Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) CPU: 1 PID: 1 Comm: sapper/0 Not tainted 5.10.20-Unraid #1 Hardware name: MSI MS-7641/760CM-P23(FX) (MS-7641) , BIOS V17.9 03/23/2012 Call Trace: dump_stack+0x6b/0x03 panic+0xff/0x2a1 mount_block_root_0x2fd/0x30c ? rest_init+0xaf/0xaf prepare_namespace+0x131/0x160 ? rest_init+0xaf/0xaf kernel_init_0x5/0xfa ret_from_fork_0x22/0x30 Kernel Offset: disabled ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown block(0,0) ] --- Yes, this is old hardware. No, the machine hasn't been on for a year or so, therefore the version of Unraid is old. No, I won't be unreasonably sorry if I have to upgrade my primary server to pass its MoBo on down to my backup server. However, if anyone has any idea about a possible recovery solution for this, I'm all ears. I don't have diagnostics, since the machine hasn't booted fully for me to get to the GUI to run them. If there are any logs being written to the USB boot drive, I'm happy to pull them and post it here. I'm attaching a photo of the last bit of what's on the display. Maybe there's an issue with the lines above and I may have a possibility of recovery? Quote Link to comment
JorgeB Posted February 23, 2023 Share Posted February 23, 2023 This is usually a flash drive problem, assuming there's at least 4GB of RAM, try recreating it. 1 Quote Link to comment
FreeMan Posted February 26, 2023 Author Share Posted February 26, 2023 (edited) Thanks, @JorgeB. Been a bit busy, just now getting a chance to look at this again. I presume you mean that I should backup the flash drive to another machine then rebuild on the same physical drive, then copy the config back over, and not (yet, at least) replace the drive itself. Perusing this section of the manual for instructions. Edited February 26, 2023 by FreeMan Quote Link to comment
FreeMan Posted February 26, 2023 Author Share Posted February 26, 2023 Seems my USB stick has died. Plugged it into my Win10 machine, it beeps, noting that a USB device has been plugged in, but Win doesn't seem to be able to access it. It's been at least a year since this machine has been powered on, I'm not sure I've got a backup of the config (my bad, I know...) I believe I should be able to identify the Parity from the Data drives by plugging them into a USB dock on my main machine - if I can read a file structure, it's a data drive, otherwise, it's parity, is that a reasonable assumption? Once I've identified parity, I can transfer the license to a new USB stick and rebuild the array by assigning the parity drive, then the data drives, then build parity and all will (should) be good, right? Of course, I could probably just clear the drives as a year-old backup isn't doing me any favors, either. Quote Link to comment
JorgeB Posted February 27, 2023 Share Posted February 27, 2023 17 hours ago, FreeMan said: Once I've identified parity, I can transfer the license to a new USB stick and rebuild the array by assigning the parity drive, then the data drives, then build parity and all will (should) be good, right? Yes, and you can check "parity is already valid", assuming disks are all re-assigned as they were. 1 Quote Link to comment
FreeMan Posted March 3, 2023 Author Share Posted March 3, 2023 I've had 10000 other things going on and I'm just getting back to this (under a new account because of the change to the unraid.net login). On 2/26/2023 at 10:26 AM, FreeMan said: I believe I should be able to identify the Parity from the Data drives by plugging them into a USB dock on my main machine - if I can read a file structure, it's a data drive, otherwise, it's parity, is that a reasonable assumption? Would someone please confirm that this assumption is correct? I've got a new USB stick built, and I've pulled 2 drives from the old machine. When I mounted the first drive in a USB dock, it showed up in Unassigned Devices and offered me a chance to format the drive. I respectfully declined. The second drive gave me an active "Mount" button. I mounted it and was able to see some of the old disk shares there. In my mind, the first drive was the parity drive and the rest are, obviously, data drives. I just want to be sure I'm correct before booting the old machine on the new stick and rebuilding the array & parity. Quote Link to comment
FreeMan Posted March 3, 2023 Author Share Posted March 3, 2023 I read further down the "replace your USB key" page and yes, that is the safe assumption - it's spelled out there. Just gotta keep reading, kid, the answers are there. Quote Link to comment
FreeMan Posted March 3, 2023 Author Share Posted March 3, 2023 I'm confused. I've built a new USB drive, booted the backup server off of it and transferred the license key to the new stick. When I look at my unassigned drives, this is what I get: None of them give me the same thing I saw when I plugged a couple into my main server. None have a "Mount" button (enabled, disabled, or otherwise). What am I missing here? Realistically, I could go ahead and rebuild this completely from scratch and I don't think I'd loose much, as far out of date as my last backup was, but I'd like to understand what's going on, first. Quote Link to comment
SimonF Posted March 3, 2023 Share Posted March 3, 2023 1 minute ago, Free Man said: I'm confused. I've built a new USB drive, booted the backup server off of it and transferred the license key to the new stick. When I look at my unassigned drives, this is what I get: None of them give me the same thing I saw when I plugged a couple into my main server. None have a "Mount" button (enabled, disabled, or otherwise). What am I missing here? Realistically, I could go ahead and rebuild this completely from scratch and I don't think I'd loose much, as far out of date as my last backup was, but I'd like to understand what's going on, first. You have not installed unassigned devices from apps Quote Link to comment
FreeMan Posted March 3, 2023 Author Share Posted March 3, 2023 I appear to be an id10t today. TYVM... Quote Link to comment
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