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Old 19th October 2015
notooth notooth is offline
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Red face Cannot mount Linux ext2 partitions

Hi,

I got an error when mounting a Linux partition. Please help:

Quote:
# mount -t ext2fs /dev/wd1a /mnt/Storage1
mount_ext2fs: /dev/wd1a on /mnt/Storage1: Device not configured
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Old 19th October 2015
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jggimi jggimi is offline
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I don't use NetBSD, but in the NetBSD Guide I found a discussion of provisioning disklabels for foreign filesystems. While this guide is for i386 and discusses Microsoft, the same information should apply to other MBR architecture platforms and to Linux MBR partitions

https://www.netbsd.org/ports/i386/faq.html#ms_partition
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Old 19th October 2015
notooth notooth is offline
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I followed the NetBSD Guide and got the error:

Quote:
# disklabel wd1
# /dev/rwd1d:
type: ESDI
disk: ST2000LM003 HN-M
label: fictitious
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 3876021
total sectors: 3907029168
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # microseconds
track-to-track seek: 0 # microseconds
drivedata: 0

6 partitions:
# size offset fstype [fsize bsize cpg/sgs]
d: 3907029168 0 unused 0 0 # (Cyl. 0 - 3876020)
e: 1999997953 2048 Linux Ext2 0 0 # (Cyl. 2*- 1984126*)
f: 1907028144 2000001024 Linux Ext2 0 0 # (Cyl. 1984128 - 3876020)
disklabel: boot block size 0
disklabel: super block size 0

# mount -t ext2fs /dev/wd1e /mnt/Storage1
mount_ext2fs: /dev/wd1e on /mnt/Storage1: incorrect super block
# mount -t ext2fs /dev/wd1f /mnt/Storage1
mount_ext2fs: /dev/wd1f on /mnt/Storage1: incorrect super block
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Old 19th October 2015
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jggimi jggimi is offline
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You've gotten further. Excellent! It appears that the mount is now failing because of incorrect (or unexpected) metadata in the two filesystems

Are you sure these are EXT2 filesystems? The MBR partition type does not always align with the underlying filesystem.
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Old 25th October 2015
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classicmanpro classicmanpro is offline
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Post Create an EXT2 filesystem and use revision 0 (aka GOOD_OLD_REV) as the format

The best way to share a partition with Linux is to create an EXT2 filesystem and use revision 0 (aka GOOD_OLD_REV) as the filesystem format.

By using the GOOD_OLD_REV (revision 0) format you can avoid the ''dir_index'' and ''large_file'' issues encountered with DYNAMIC_REV (revision 1).

Here is an example of how you can create, format and check an EXT2 filesystem using the Linux native tools:

Code:
 # mkfs -t ext2 -r 0 /dev/hda3
 # fsck -C -t ext2 /dev/hda3
 # tune2fs -c 20 -i 6m -L Share /dev/hda3
 # fsck -C -t ext2 /dev/hda3
 # tune2fs -l /dev/hda3
If you want or have a dual boot system, I suggest using GParted Live to prepare the partitions with EXT2-rev0, then install Linux, but without formatting the partitions.

This will ensure 100% compatibility with Linux.
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