Solved Can't mount ext4 partitions, Input/output error

nxjoseph

nxjoseph

Hi. I can't mount ext4 partitions that i created on FreeBSD. I have 2 hard drives that both has one ext4 partition.
Code: 
# mount -t ext2fs /dev/ada1p1 /mnt/
mount: /dev/ada1p1: Input/output error
I can mount it with fuse-ext2 command but i can't list the mounted directory.
Code: 
# fuse-ext2 /dev/ada0p1 /mnt/
Mounting /dev/ada0p1 Read-Only.
# ls /mnt
ls: /mnt: Input/output error

I did load fusefs module.
 
Looks like a USB stick was removed. Is the ext2fs on that USB stick and if so did you remove it after the attempt?
 
I want to mount /dev/ada0p1 and /dev/ada1p1, they are both ext4 partitions. the USB stick was my FreeBSD installation media, I removed it because its not needed.

Code: 
[root@desktop ~]# file -s /dev/ada1p1
/dev/ada1p1: Linux rev 1.0 ext4 filesystem data, UUID=41b8b34b-19b8-4cd7-b817-ad60fb2a0d59 (extents) (64bit) (large files) (huge files)
[root@desktop ~]# file -s /dev/ada0p1
/dev/ada0p1: Linux rev 1.0 ext4 filesystem data, UUID=28cba787-d35f-426e-b445-bcca7ec71c1c (extents) (64bit) (large files) (huge files)
[root@desktop ~]#

Code: 
# gpart list
Geom name: ada0
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 1953525127
first: 40
entries: 128
scheme: GPT
Providers:
1. Name: ada0p1
   Mediasize: 1000204845056 (932G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
   efimedia: HD(1,GPT,872c55c8-8f71-11ee-8eec-3c7c3fba4204,0x28,0x74706d60)
   rawuuid: 872c55c8-8f71-11ee-8eec-3c7c3fba4204
   rawtype: 0fc63daf-8483-4772-8e79-3d69d8477de4
   label: (null)
   length: 1000204845056
   offset: 20480
   type: linux-data
   index: 1
   end: 1953525127
   start: 40
Consumers:
1. Name: ada0
   Mediasize: 1000204886016 (932G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0

Geom name: ada1
modified: false
state: OK
fwheads: 16
fwsectors: 63
last: 976773127
first: 40
entries: 128
scheme: GPT
Providers:
1. Name: ada1p1
   Mediasize: 500107821056 (466G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
   efimedia: HD(1,GPT,b1d8035b-8f77-11ee-8eec-3c7c3fba4204,0x28,0x3a385fe0)
   rawuuid: b1d8035b-8f77-11ee-8eec-3c7c3fba4204
   rawtype: 0fc63daf-8483-4772-8e79-3d69d8477de4
   label: (null)
   length: 500107821056
   offset: 20480
   type: linux-data
   index: 1
   end: 976773127
   start: 40
Consumers:
1. Name: ada1
   Mediasize: 500107862016 (466G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
 
nxjoseph said:
I tried running fsck without parameters, it says clean. I think they are healthy because I was able to use them on Linux.
Click to expand...
Do you have a Linux installation around, on which you could try mounting it?

Did you try running file -s /dev/da0p1 ? Maybe the partition is not formatted as you believe.
 
I've tried both methods and personally I prefer the following one:
forums.freebsd.org

Howto: mounting ext4 partitions by using ext2fs, rw access

More recently, ext2fs that comes in FreeBSD's base is capable of reading and writing ext4 filesystems. It's claimed to work on ext2 and ext3 as well. Previously, sysutils/fusefs-ext2 had to be used, or ext2fs could only mount ext4 as read only. Set the ext2fs driver to be loaded by compiling it...
forums.freebsd.org forums.freebsd.org
 
balanga said:
Did you try running file -s /dev/da0p1 ? Maybe the partition is not formatted as you believe.
Click to expand...
nxjoseph said:
[root@desktop ~]# file -s /dev/ada1p1 /dev/ada1p1: Linux rev 1.0 ext4 filesystem data, UUID=41b8b34b-19b8-4cd7-b817-ad60fb2a0d59 (extents) (64bit) (large files) (huge files) [root@desktop ~]# file -s /dev/ada0p1 /dev/ada0p1: Linux rev 1.0 ext4 filesystem data, UUID=28cba787-d35f-426e-b445-bcca7ec71c1c (extents) (64bit) (large files) (huge files) [root@desktop ~]#
Click to expand...
I don't have Linux installed but i can use a live media to try it.
 
I booted a live Linux and i was able to mount them there. In the past, they were zfs partitions and while they are ext4, i used zpool import and used zpool labelclear on them, I was seeing zfs read error in boot process on these so i did this.
 
I reformatted the disks respectively and copied the data to each other from a live linux, now i can mount them on FreeBSD.

When I ran zdb -l /dev/ada0p1 i saw that it has zpool label on it and this was causing error messages at loader stage and i cleared it with zpool labelclear /dev/ada0p1. Now it seems fine.
 
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