Hello; I am trying to set OpenWRT on an external usb drive. I have been mostly successful except for one thing:
root@Confusion:/home# df
/dev/root xx. xx. xx. xx /rom/rom
/dev/sda1 xx xx xx xx /rom/overlay
overlayfs:/overlay xx xx xx xx /rom
ubi1:syscfg xx xx xx xx /tmp/syscfg
/dev/sda1 xx xx xx xx /overlay
overlayfs:/overlay xx xx xx xx /
/dev/sda4 xx xx xx xx /home
I am pretty sure that lines 1, 3, and 4, should not be there. How do I correct that?
Thank you.
First of all you are putting coding info in basic text which makes it harder to read. You should use the </> icon to put shell output.
Moving on to your problem, I dont understand why /dev/root is mounted to /rom/rom it should be /rom. I think you may have mixed up the copying directories. I suggest you to reset the device to OpenWrt defaults and then use the above link as suggested by @vgaetera to properly configure ExtRoot on your device. Btw which device are you using?
1 Like
The link mentioned is what I used to setup the extroot. I have done it twice, and I suspect that I skipped a step both times.
I can't figure out what step I may have skipped.
(Sorry for the hard to read text. I will use </> from now on).
root@Confusion:/rom/rom/rom# df
1. Filesystem 1K-blocks Used Available Use% Mounted on
2. /dev/root 2304 2304 0 100% /rom/rom
3. tmpfs 255972 140 255832 0% /tmp
4. /dev/sda1 10255636 96656 9618308 1% /rom/overlay
5. overlayfs:/overlay 10255636 96656 9618308 1% /rom
6. ubi1:syscfg 30276 284 28412 1% /tmp/syscfg
7. tmpfs 512 0 512 0% /dev
8. /dev/sda1 10255636 96656 9618308 1% /overlay
9. overlayfs:/overlay 10255636 96656 9618308 1% /
10. /dev/sda4 1806205244 143176820 1571208388 8% /home
Well I use my router with ExtRoot so I can just give you an overview on how to do it. I am considering that you have a default config for your router.
First you should identify if your USB is plugged in properly and for this try ls /dev/ and you should see all the partitions. Also make sure you have the correct filesystem installed for example Ext3. Then mount your usb partition with mount /dev/sda1 /mnt. sda1 is the first partition of USB. Edit the /etc/config/fstab to make sure everything runs on boot./overlay to usb partition and for this use this command. tar -C /overlay -cvf - . | tar -C /mnt -xf - and once you are done then just umount /mnt and reboot to see the changes.
Edit: Please post the output of cat /etc/config/fstab here
cat /etc/config/fstab when running on original drive
root@OpenWrt:/etc/config# cat fstab
config global
option anon_swap '0'
option anon_mount '0'
option auto_swap '1'
option auto_mount '1'
option delay_root '5'
option check_fs '0'
config mount
option target '/overlay'
option uuid '62b8bc5a-ab5b-4ecc-95f0-247758046964'
option enabled '1'
config mount
option target '/mnt/sda2'
option uuid '671198b5-6458-4af0-8133-e4667e06a897'
option enabled '0'
config swap
option uuid 'a58d61c8-dc9b-483f-927e-a9cc7bb84ddc'
option enabled '0'
config mount
option target '/mnt/sda4'
option uuid '02501e2d-5f01-4b9d-8f60-f4d414d5bacd'
option enabled '1'
config mount 'rwm'
option device '/dev/ubi0_1'
option target '/rwm'
#config mount 'overlay'
# option target '/overlay'
cat /etc/config/fstab when running on USB drive
root@OpenWrt:/mnt/upper/etc/config# cat fstab
config 'global'
option anon_swap '0'
option anon_mount '0'
option auto_swap '1'
option auto_mount '1'
option delay_root '5'
option check_fs '0'
config 'mount'
option target '/overlay'
option uuid '62b8bc5a-ab5b-4ecc-95f0-247758046964'
option enabled '0'
config 'mount'
option target '/mnt/sda2'
option uuid '671198b5-6458-4af0-8133-e4667e06a897'
option enabled '0'
config 'swap'
option uuid 'a58d61c8-dc9b-483f-927e-a9cc7bb84ddc'
option enabled '0'
config 'mount'
option target '/mnt/sda4'
option uuid '02501e2d-5f01-4b9d-8f60-f4d414d5bacd'
option enabled '1'
df on original:
root@OpenWrt:/etc/config# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/root 2304 2304 0 100% /rom
tmpfs 255972 96 255876 0% /tmp
/dev/ubi0_1 24540 1836 21416 8% /overlay
overlayfs:/overlay 24540 1836 21416 8% /
ubi1:syscfg 30276 284 28412 1% /tmp/syscfg
tmpfs 512 0 512 0% /dev
df: /mnt/sda4: No such file or directory
/dev/sda1 10255636 96660 9618304 1% /mnt
root@OpenWrt:/etc/config#
Also,I just noticed:
Is it supposed to be work AND work?
Thank you.
It's only supposed to be /overlay/work. Somehow somewhere you are duplicating the direcory structure on your USB device. Have you cleaned up the USB partition? Make sure there's nothing in sda1 when you run the copy command. So you should first mount sda1 at /mnt and then issue rm /mnt/* to remove everything from the usb partition.
logread | sed -n -e "/ preinit /,/ init /p"
block info
On USB system:
root@Confusion:~# logread | sed -n -e "/ preinit /,/ init /p"
root@Confusion:~#
root@Confusion:~# block info
/dev/mtdblock5: UUID="9464850" VERSION="1" TYPE="ubi"
/dev/mtdblock7: UUID="1604771158" VERSION="1" TYPE="ubi"
/dev/mtdblock8: UUID="1615526205" VERSION="1" TYPE="ubi"
/dev/ubiblock0_0: UUID="552f44be-88d432a7-08fdfb29-6b14a924" VERSION="4.0" MOUNT="/rom/rom" TYPE="squashfs"
/dev/ubi0_1: UUID="1a6a3db0-4714-4298-87ad-0c0d5882a86f" VERSION="w4r0" TYPE="ubifs"
/dev/ubi1_0: UUID="e1196807-b9c7-4d2e-aeb4-97f23ba0af38" VERSION="w4r0" TYPE="ubifs"
/dev/sda1: UUID="62b8bc5a-ab5b-4ecc-95f0-247758046964" VERSION="1.0" MOUNT="/rom/overlay" TYPE="ext4"
/dev/sda2: UUID="671198b5-6458-4af0-8133-e4667e06a897" VERSION="1.0" TYPE="ext4"
/dev/sda3: UUID="a58d61c8-dc9b-483f-927e-a9cc7bb84ddc" VERSION="1" TYPE="swap"
/dev/sda4: UUID="02501e2d-5f01-4b9d-8f60-f4d414d5bacd" VERSION="1.0" MOUNT="/rom/mnt/sda4" TYPE="ext4"
root@Confusion:~# dmesg | sed -n -e "/ preinit /,/ init /p"
[ 3.054878] init: - preinit -
[ 3.111456] scsi 2:0:0:0: Direct-Access Seagate Ultra Slim MT 0304 PQ: 0 ANSI: 6
[ 3.119793] random: procd: uninitialized urandom read (4 bytes read)
[ 3.120883] sd 2:0:0:0: [sda] Spinning up disk...
[ 3.227021] mvneta f1070000.ethernet tmp0: renamed from eth0
[ 3.272527] mvneta f1034000.ethernet eth0: renamed from eth1
[ 3.312513] mvneta f1070000.ethernet eth1: renamed from tmp0
[ 3.607112] random: jshn: uninitialized urandom read (4 bytes read)
[ 3.624152] random: jshn: uninitialized urandom read (4 bytes read)
[ 3.800736] mvneta f1034000.ethernet eth0: configuring for fixed/sgmii link mode
[ 3.808575] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3.814632] mvneta f1034000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off
[ 3.822572] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 4.151145] .
[ 5.191144] .
[ 6.231144] .
[ 6.903954] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 821
[ 6.961544] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "rootfs_data"
[ 6.969410] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[ 6.979378] UBIFS (ubi0:1): FS size: 27934720 bytes (26 MiB, 220 LEBs), journal size 1396736 bytes (1 MiB, 11 LEBs)
[ 6.989861] UBIFS (ubi0:1): reserved for root: 1319425 bytes (1288 KiB)
[ 6.996508] UBIFS (ubi0:1): media format: w4/r0 (latest is w5/r0), UUID 1A6A3DB0-4714-4298-87AD-0C0D5882A86F, small LPT model
[ 7.011733] mount_root: loading kmods from internal overlay
[ 7.030102] kmodloader: loading kernel modules from /tmp/overlay/upper/etc/modules-boot.d/*
[ 7.055057] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 7.061524] ohci-platform: OHCI generic platform driver
[ 7.068956] uhci_hcd: USB Universal Host Controller Interface driver
[ 7.075662] kmodloader: done loading kernel modules from /tmp/overlay/upper/etc/modules-boot.d/*
[ 7.146636] block: attempting to load /tmp/ubifs_cfg/upper/etc/config/fstab
[ 7.155224] block: extroot: device not present, retrying in 15 seconds
[ 7.271143] .
[ 7.271238] ready
[ 7.274874] sd 2:0:0:0: [sda] 3907029167 512-byte logical blocks: (2.00 TB/1.82 TiB)
[ 7.314330] sd 2:0:0:0: [sda] Write Protect is off
[ 7.319142] sd 2:0:0:0: [sda] Mode Sense: 4f 00 00 00
[ 7.319335] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 7.354563] sda: sda1 sda2 sda3 sda4
[ 7.359310] sd 2:0:0:0: [sda] Attached SCSI disk
[ 22.866051] EXT4-fs (sda1): 1 orphan inode deleted
[ 22.870863] EXT4-fs (sda1): recovery complete
[ 22.967167] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts:
[ 22.987074] random: crng init done
root@Confusion:~#
Does this happen upon every boot?
mk24
August 9, 2019, 7:40pm
12
The typical extroot is to copy the entire rootfs and overlay files to one filesystem on the external drive, then mount it at /, completely abandoning the internal flash after initial bootup. Since this entire new root partition is equally writeable, there is no concept of an overlay any more.
And yes the new filesystem is improperly prepared with an extra directory level, it would be best to erase it and make a new copy.
I rebooted right after your question:
[ 7.452300] sd 2:0:0:0: [sda] Attached SCSI disk
[ 22.387301] EXT4-fs (sda1): 1 orphan inode deleted
[ 22.392114] EXT4-fs (sda1): recovery complete
[ 22.488416] EXT4-fs (sda1): mounted filesystem with or
So, it happened in previous reboot and in this one.
root@OpenWrt:~# mount /dev/sda1 /mnt
root@OpenWrt:~# cd /mnt
root@OpenWrt:/mnt# ls
etc upper work
root@OpenWrt:/mnt# pwd
/mnt
I do not follow. I followed the instruction on the site (twice) with the same result. The site says:
mount /dev/sda1 /mnt
cp -a -f /overlay/. /mnt
umount /mnt
and this is my new 'root' drive:
root@OpenWrt:~# mount /dev/sda1 /mnt
root@OpenWrt:~# cd /mnt
root@OpenWrt:/mnt# ls
etc upper work
root@OpenWrt:/mnt# pwd
/mnt
I did copy the whole thing into the roof of the new partition.
I am back.
Reformated the /dev/sda1 drive, follow the instructions on the link (https://openwrt.org/docs/guide-user/additional-software/extroot_configuration ).
I am back at square 1; although I tried this:
root@OpenWrt:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/root 2304 2304 0 100% /rom/rom
tmpfs 255972 96 255876 0% /tmp
/dev/sda1 10255636 39540 9675424 0% /rom/overlay
overlayfs:/overlay 10255636 39540 9675424 0% /rom
ubi1:syscfg 30276 284 28412 1% /tmp/syscfg
tmpfs 512 0 512 0% /dev
/dev/ubi0_1 24540 1440 21812 6% /rom/rwm
/dev/sda1 10255636 39540 9675424 0% /overlay
overlayfs:/overlay 10255636 39540 9675424 0% /
root@OpenWrt:~# umount /rom/rom
root@OpenWrt:~# umount /rom/overlay
root@OpenWrt:~# umount /rom/rwm
root@OpenWrt:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 255972 96 255876 0% /tmp
overlayfs:/overlay 10255636 39540 9675424 0% /rom
ubi1:syscfg 30276 284 28412 1% /tmp/syscfg
tmpfs 512 0 512 0% /dev
/dev/sda1 10255636 39540 9675424 0% /overlay
overlayfs:/overlay 10255636 39540 9675424 0% /
root@OpenWrt:~#
Every filesystem mentioned in /etc/config/fstab gets mounted over /rom.
It seems your issue is hardware-specific or firmware-version-specific.
I noticed something in the process...
grep -e rootfs_data /proc/mtd. !returns nothing on original system.
/proc/mtab shows:
grep -e rootfs_data /proc/mtd
root@OpenWrt:/rwm/upper# cat /proc/mtd
dev: size erasesize name
mtd0: 00200000 00020000 "u-boot"
mtd1: 00040000 00020000 "u_env"
mtd2: 00040000 00020000 "s_env"
mtd3: 00100000 00020000 "devinfo"
mtd4: 02800000 00020000 "kernel1"
mtd5: 02200000 00020000 "ubi"
mtd6: 02800000 00020000 "kernel2"
mtd7: 02200000 00020000 "rootfs2". <<<<---- This is where root was located.
mtd8: 02600000 00020000 "syscfg"
mtd9: 00680000 00020000 "unused_area"
Perhaps the built-in extroot function on the preinit stage doesn't know how to properly handle this flash layout.
And I found the problem
In order to get new partition to work, I had to:
root@OpenWrt:~# cat /etc/rc.local
# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.
#export PREINIT=1
#mount_root
exit 0
root@OpenWrt:~#
Somehow (don't ask me) rc.local was copied from original partition to usb partition.
2 Likes
system
August 19, 2019, 11:34pm
20
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