I have been trying to create an SDcard to use with an Raspberry
Pi. The card is created using the rpi-imager program on Fedora (41)
and that program reports the creation as successful. Later, after
mounting the ext4 partition on the card under Fedora and doing two or
three minutes of exploration, I encounter a bad block. So I unmount
the partition and use e2fsck to locate any bad blocks and mark them:
e2fsck -y -c /dev/sdb2
But after that when I try to remount the partition, it seems that
e2fsck has destroyed the filesystem!
# mount /dev/sdb2 /mnt
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sdb2,
missing codepage or helper program, or other error.
dmesg(1) may have more information after failed mount system call.
Checking dmesg, I see that the mount has tried several possible
filesystem types without success, including several lines like,
"EXT4-fs (sdb2): VFS: Can't find ext4 filesystem". Explicitly adding
"-t ext4" to the mount does not help.
I've repeated this process, again getting success, including
verification, from rpi-imager. This time I omitted the -c from the
e2fsck command and was able to mount the partition after.
So it appears that asking e2fsck to check for and mark bad blocks
causes it to destroy the superblock(s). Is there another explanation?
--
Dave Close, Compata, Irvine CA +1 714 434 7359
dave@xxxxxxxxxxx dhclose@xxxxxxxxxxxxxxxxxx
"Some ideas are so stupid that only intellectuals believe them."
-- George Orwell
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