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Serchio
n00b
Joined: 17 May 2008
Posts: 26
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 Posted: Sun Aug 10, 2014 4:13 pm Post subject: [SOLVED] Kernel panic when switched from sata3 to sata6 |
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Hello,
From some time I tried to discover what is happening when I am trying to start my gentoo linux from my ssd drive Samsung 840 Evo.
System is working normally when my ssd is connected to sata3 connector but when I switch it to sata6 I receive kernel panic.
Unfortunately, I can't read the kernel panic message because my framebuffer for grub is too small - I have a nvidia card and I can't get bigger resolution than 1280x800.
I was trying to use netconsole to discover kernel panic message but without luck. I have tried to test netconsole with modprobe with all necessary parameters but netconsole is not sending any packages to other local host.
I was trying to use kdump to login in rescue mode when kernel panic occure but also without luck.
I don't know what I can do more to discover what is wrong with my kernel or maybe with my gentoo.
My motherboard is Asus P8Z77-V LX2.
Here is my kernel config: http://pastebin.com/KEhyw5TQ
Here is my lspci: http://pastebin.com/ZsNK6ViH
I have tried to use netconsole in such way:
| Code: | | modprobe netconsole netconsole=4444@192.168.1.110/enp3s0,5555@192.168.1.146/68:a8:6d:4f:af:64 |
I have created such config for kdump:
| Code: | #!/bin/bash
kexec -p /boot/vmlinuz-3.15.3-gentoo --append="root=/dev/sdc2 single irqpoll maxcpus=1 reset_devices" |
In messages I can saw such message:
| Code: | | Aug 10 15:40:07 laporath systemd[1]: Starting Service for local.d/kdump.*... |
Any suggestions what I can try to discover and fix kernel panic?
Last edited by Serchio on Sun Aug 10, 2014 10:00 pm; edited 1 time in total |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Sun Aug 10, 2014 4:23 pm Post subject: |
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Serchio,
When does the panic occur?
During booting, before root is mounted or some time later?
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Serchio
n00b
Joined: 17 May 2008
Posts: 26
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| Posted: Sun Aug 10, 2014 5:38 pm Post subject: |
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NeddySeagoon,
It is really hard to determinate because boot is super fast and kernel panic is occurring immediately.
In normal boot when ssd is connected to sata3 my gentoo is booting 5 seconds only...
If you have any idea how to slow it down it would be really helpful. |
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Sun Aug 10, 2014 7:11 pm Post subject: |
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| boot_delay=1000 should do it. |
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Serchio
n00b
Joined: 17 May 2008
Posts: 26
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| Posted: Sun Aug 10, 2014 7:21 pm Post subject: |
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| Ant P. wrote: | | boot_delay=1000 should do it. |
I have appended it to grub in kernel section but boot speed was normal. Should it be appended somewhere else?
It is my gentoo boot section:
| Code: | menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-31cf4eb8-f097-4b14-9f76-09aa6ce46faf' {
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd2,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd2,msdos2 --hint-efi=hd2,msdos2 --hint-baremetal=ahci2,msdos2 31cf4eb8-f097-4b14-9f76-09aa6ce46faf
else
search --no-floppy --fs-uuid --set=root 31cf4eb8-f097-4b14-9f76-09aa6ce46faf
fi
echo 'Loading Linux 3.15.3-gentoo ...'
linux /boot/vmlinuz-3.15.3-gentoo root=/dev/sdc2 ro boot_delay=1000 init=/usr/lib/systemd/systemd crashkernel=256M
}
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Sun Aug 10, 2014 8:47 pm Post subject: |
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Serchio,
netconsole must be built in. I suspect that root is not mounting for some reason.
Further | Code: | | netconsole netconsole=4444@192.168.1.110/enp3s0,5555@192.168.1.146/68:a8:6d:4f:af:64 |
cannot work until udev is running, after root is mounted.
enp3s0 is a udev assigned name. It will be eth0 before the panic.
How many hard drives do you have and what SATA ports does dmesg tell they are connected to when it works?
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Serchio
n00b
Joined: 17 May 2008
Posts: 26
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| Posted: Sun Aug 10, 2014 8:55 pm Post subject: |
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NeddySeagoon,
I have 3 drives. There is the dmesg output:
| Code: | [ 0.567087] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 0.567281] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 0.567473] ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 0.568068] ata4.00: ATA-8: WDC WD6401AALS-00J7B0, 05.00K05, max UDMA/133
[ 0.568246] ata4.00: 1250263728 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[ 0.569410] ata4.00: configured for UDMA/133
[ 0.569636] ata6.00: supports DRM functions and may not be fully accessible
[ 0.569880] ata6.00: failed to get NCQ Send/Recv Log Emask 0x1
[ 0.569883] ata6.00: ATA-9: Samsung SSD 840 EVO 250GB, EXT0BB6Q, max UDMA/133
[ 0.571773] ata6.00: 488397168 sectors, multi 1: LBA48 NCQ (depth 31/32), AA
[ 0.572093] ata6.00: supports DRM functions and may not be fully accessible
[ 0.572312] ata3.00: ATA-8: WDC WD20EARS-00MVWB0, 51.0AB51, max UDMA/133
[ 0.572498] ata3.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[ 0.572769] ata6.00: failed to get NCQ Send/Recv Log Emask 0x1
[ 0.572772] ata6.00: configured for UDMA/133
[ 0.577857] ata3.00: configured for UDMA/133
[ 0.578118] usb 1-1: new high-speed USB device number 2 using ehci-pci
[ 0.578265] scsi 2:0:0:0: Direct-Access ATA WDC WD20EARS-00M 51.0 PQ: 0 ANSI: 5
[ 0.578655] sd 2:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
[ 0.578659] sd 2:0:0:0: Attached scsi generic sg0 type 0
[ 0.578911] scsi 3:0:0:0: Direct-Access ATA WDC WD6401AALS-0 05.0 PQ: 0 ANSI: 5
[ 0.579250] sd 3:0:0:0: Attached scsi generic sg1 type 0
[ 0.579281] sd 3:0:0:0: [sdb] 1250263728 512-byte logical blocks: (640 GB/596 GiB)
[ 0.579488] sd 3:0:0:0: [sdb] Write Protect is off
[ 0.579490] sd 3:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 0.579493] scsi 5:0:0:0: Direct-Access ATA Samsung SSD 840 EXT0 PQ: 0 ANSI: 5
[ 0.579569] sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 0.579729] sd 5:0:0:0: Attached scsi generic sg2 type 0
[ 0.579763] sd 5:0:0:0: [sdc] 488397168 512-byte logical blocks: (250 GB/232 GiB)
[ 0.579912] sd 5:0:0:0: [sdc] Write Protect is off
[ 0.579914] sd 5:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 0.579953] sd 5:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 0.580512] sdc: sdc1 sdc2
[ 0.580930] sd 5:0:0:0: [sdc] Attached SCSI disk
[ 0.582001] sd 2:0:0:0: [sda] Write Protect is off
[ 0.582181] sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 0.582195] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 0.588586] sdb: sdb2
[ 0.589165] sd 3:0:0:0: [sdb] Attached SCSI disk
[ 0.604512] sda: sda1
[ 0.604916] sd 2:0:0:0: [sda] Attached SCSI disk
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I was trying to run netconsole from command line like showed in many examples, but any packet is not reaching my second machine. Do you think, that should I put it to my kernel anyway? |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Sun Aug 10, 2014 9:11 pm Post subject: |
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Serchio,
When you move the drives around on tho SATA connectors, they will change names.
Your root will no longer be it will be on root=/dev/sda2 or root=/dev/sdb2 instead.
You will need to change both grub.cnf and /etc/fstab to work with your new drive ordering.
You will still have /devsd[abc] but the letters will reference different drives.
| Code: | [ 0.578655] sd 2:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) == ata3 WDC WD20EARS-00MVWB0
[ 0.579281] sd 3:0:0:0: [sdb] 1250263728 512-byte logical blocks: (640 GB/596 GiB) == ata4 WDC WD6401AALS-00J7B0
[ 0.579763] sd 5:0:0:0: [sdc] 488397168 512-byte logical blocks: (250 GB/232 GiB) == ata6 Samsung SSD 840 EVO 250GB |
This looks like your non working configuration
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Serchio
n00b
Joined: 17 May 2008
Posts: 26
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| Posted: Sun Aug 10, 2014 9:59 pm Post subject: |
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Thank you NeddySeagoon, you were right and you have solved my problem 
My root is now /dev/sda2 but I will need to replace it with drive uid to be better prepared for changes. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Mon Aug 11, 2014 3:41 pm Post subject: |
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Serchio,
Mounting root by filesystem UUID requires an initrd as the kernel does not understand filesystem UUIDs.
However partitions also have a UUID and the kernel does understand PARTUUID.
blkid will tell you both the filesystem UUID and partition UUID.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Kernel & Hardware
