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computers / alt.os.linux.slackware / Re: can't mount ISO on loop

SubjectAuthor
* can't mount ISO on loopDavid Chmelik
+* Re: can't mount ISO on loopHenrik Carlqvist
|`* Re: can't mount ISO on loopDavid Chmelik
| `- Re: can't mount ISO on loopRich
+- Re: can't mount ISO on loopMike Small
+* Re: can't mount ISO on loopJohn McCue
|`* Re: can't mount ISO on loopBit Twister
| `- Re: can't mount ISO on loopAlexander Grotewohl
+- Re: can't mount ISO on loopbad sector
`* Re: can't mount ISO on loopDavid Chmelik
 `* Re: can't mount ISO on loopHenrik Carlqvist
  `- Re: can't mount ISO on loopDavid Chmelik

1
can't mount ISO on loop

<sucicq$19al$1@gioia.aioe.org>

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From: dchmelik@gmail.com (David Chmelik)
Newsgroups: alt.os.linux.slackware
Subject: can't mount ISO on loop
Date: Mon, 14 Feb 2022 03:30:34 -0000 (UTC)
Organization: Aioe.org NNTP Server
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 by: David Chmelik - Mon, 14 Feb 2022 03:30 UTC

On Slackware64 15+current, I can no longer mount ISOs on loopback.

root@cosmos:~# mount ware/slackware/slackware64-15.0-iso/slackware64-15.0-
install-dvd.iso /scd -o loop
mount: /scd: can't read superblock on /dev/loop0.

Re: can't mount ISO on loop

<suct8i$7bc$1@dont-email.me>

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From: Henrik.Carlqvist@deadspam.com (Henrik Carlqvist)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Mon, 14 Feb 2022 06:36:02 -0000 (UTC)
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 by: Henrik Carlqvist - Mon, 14 Feb 2022 06:36 UTC

On Mon, 14 Feb 2022 03:30:34 +0000, David Chmelik wrote:

> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>
> root@cosmos:~# mount
> ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso /scd -o loop mount: /scd: can't read superblock on
> /dev/loop0.

What does

file ware/slackware/slackware64-15.0-iso/slackware64-15.0-install-dvd.iso

say?

I don't think that it does matter, but if the iso file seems OK I would
try to put the options before the device and mount point on the command
line:

mount -o loop ware/slackware/slackware64-15.0-iso/slackware64-15.0-
install-dvd.iso /scd

regards Henrik

Re: can't mount ISO on loop

<sudhb8$19al$2@gioia.aioe.org>

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From: dchmelik@gmail.com (David Chmelik)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Mon, 14 Feb 2022 12:18:48 -0000 (UTC)
Organization: Aioe.org NNTP Server
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 by: David Chmelik - Mon, 14 Feb 2022 12:18 UTC

On Mon, 14 Feb 2022 06:36:02 -0000 (UTC), Henrik Carlqvist wrote:

> On Mon, 14 Feb 2022 03:30:34 +0000, David Chmelik wrote:
>
>> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>>
>> root@cosmos:~# mount
>> ware/slackware/slackware64-15.0-iso/slackware64-15.0- install-dvd.iso
>> /scd -o loop mount: /scd: can't read superblock on /dev/loop0.
>
> What does
>
> file
> ware/slackware/slackware64-15.0-iso/slackware64-15.0-install-dvd.iso
>
> say?

root@cosmos:~# file ware/slackware/slackware64-15.0-iso/slackware64-15.0-
install-dvd.iso
ware/slackware/slackware64-15.0-iso/slackware64-15.0-install-dvd.iso: ISO
9660 CD-ROM filesystem data (DOS/MBR boot sector) 'SlackDVD' (bootable)

> I don't think that it does matter, but if the iso file seems OK I would
> try to put the options before the device and mount point on the command
> line:
>
> mount -o loop ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso /scd

It doesn't matter for that command; I originally learned to put '-o loop'
afterwards but you can put it before also.
The same thing happens with all ISOs.

Re: can't mount ISO on loop

<sudkr7$shm$1@dont-email.me>

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From: rich@example.invalid (Rich)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Mon, 14 Feb 2022 13:18:31 -0000 (UTC)
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 by: Rich - Mon, 14 Feb 2022 13:18 UTC

David Chmelik <dchmelik@gmail.com> wrote:
> On Mon, 14 Feb 2022 06:36:02 -0000 (UTC), Henrik Carlqvist wrote:
>
>> On Mon, 14 Feb 2022 03:30:34 +0000, David Chmelik wrote:
>>
>>> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>>>
>>> root@cosmos:~# mount
>>> ware/slackware/slackware64-15.0-iso/slackware64-15.0- install-dvd.iso
>>> /scd -o loop mount: /scd: can't read superblock on /dev/loop0.
>>
>> What does
>>
>> file
>> ware/slackware/slackware64-15.0-iso/slackware64-15.0-install-dvd.iso
>>
>> say?
>
> root@cosmos:~# file ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso
> ware/slackware/slackware64-15.0-iso/slackware64-15.0-install-dvd.iso: ISO
> 9660 CD-ROM filesystem data (DOS/MBR boot sector) 'SlackDVD' (bootable)
>
>> I don't think that it does matter, but if the iso file seems OK I would
>> try to put the options before the device and mount point on the command
>> line:
>>
>> mount -o loop ware/slackware/slackware64-15.0-iso/slackware64-15.0-
>> install-dvd.iso /scd
>
> It doesn't matter for that command; I originally learned to put '-o loop'
> afterwards but you can put it before also.
> The same thing happens with all ISOs.

Can you loop mount manually, then mount the loop device?

I.e.:

# losetup --find --show ware/slackware/slackware64-15.0-iso/slackware64-15.0-install-dvd.iso
/dev/loop0
# mount /dev/loop0 /scd

The /dev/loop0 will change depending upon what else is already mounted,
you need to use the value returned by losetup for the mount.

When done, you have to unmount, then remove the loop device:

# umount /scd
# losetup -d /dev/loop0

See the man page for losetup for details of other options.

Re: can't mount ISO on loop

<jpkleyd77g6.fsf@panix5.panix.com>

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From: smallm@panix.com (Mike Small)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Mon, 14 Feb 2022 11:12:57 -0500
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 by: Mike Small - Mon, 14 Feb 2022 16:12 UTC

David Chmelik <dchmelik@gmail.com> writes:

> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>
> root@cosmos:~# mount ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso /scd -o loop
> mount: /scd: can't read superblock on /dev/loop0.

Does it help to explicitly pass the iso9660 type to mount (-t option)?

- Mike Sm.

Re: can't mount ISO on loop

<sudvp7$hr7$1@dont-email.me>

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From: jmccue@magnetar.hsd1.ma.comcast.net (John McCue)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
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 by: John McCue - Mon, 14 Feb 2022 16:25 UTC

David Chmelik <dchmelik@gmail.com> wrote:
> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>
> root@cosmos:~# mount ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso /scd -o loop
> mount: /scd: can't read superblock on /dev/loop0.

For the Slackware 15 ISO, I cam mount it doing:

sudo mount -t iso9660 -o ro,loop <ISO-File> <mount-point>

As someone else suggested, maybe the iso9660 is needed.

HTH

--
[t]csh(1) - "An elegant shell, for a more... civilized age."
- Paraphrasing Star Wars

Re: can't mount ISO on loop

<slrnt0l17v.khg8.BitTwister@wb.home.test>

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From: BitTwister@mouse-potato.com (Bit Twister)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Mon, 14 Feb 2022 10:36:15 -0600
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 by: Bit Twister - Mon, 14 Feb 2022 16:36 UTC

On Mon, 14 Feb 2022 16:25:11 -0000 (UTC), John McCue wrote:
> David Chmelik <dchmelik@gmail.com> wrote:
>> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>>
>> root@cosmos:~# mount ware/slackware/slackware64-15.0-iso/slackware64-15.0-
>> install-dvd.iso /scd -o loop
>> mount: /scd: can't read superblock on /dev/loop0.
>
> For the Slackware 15 ISO, I cam mount it doing:
>
> sudo mount -t iso9660 -o ro,loop <ISO-File> <mount-point>
>
> As someone else suggested, maybe the iso9660 is needed.

I always use auto, Example:
mount -t auto -o ro,loop image.iso /mnt/cdrom

Re: can't mount ISO on loop

<suekp9$1vvb$1@gioia.aioe.org>

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From: alexm0n@gmail.com (Alexander Grotewohl)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Mon, 14 Feb 2022 22:23:37 -0000 (UTC)
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 by: Alexander Grotewohl - Mon, 14 Feb 2022 22:23 UTC

On Mon, 14 Feb 2022 10:36:15 -0600, Bit Twister wrote:

> On Mon, 14 Feb 2022 16:25:11 -0000 (UTC), John McCue wrote:
>> David Chmelik <dchmelik@gmail.com> wrote:
>>> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>>>
>>> root@cosmos:~# mount
>>> ware/slackware/slackware64-15.0-iso/slackware64-15.0-
>>> install-dvd.iso /scd -o loop mount: /scd: can't read superblock on
>>> /dev/loop0.
>>
>> For the Slackware 15 ISO, I cam mount it doing:
>>
>> sudo mount -t iso9660 -o ro,loop <ISO-File> <mount-point>
>>
>> As someone else suggested, maybe the iso9660 is needed.
>
> I always use auto, Example:
> mount -t auto -o ro,loop image.iso /mnt/cdrom

Even easier (as root):

mount /mnt/storage-b/iso/Linux/slackware64-current-install-
dvd.iso /mnt/cdrom

Does the right thing.

Re: can't mount ISO on loop

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 by: bad sector - Tue, 15 Feb 2022 05:29 UTC

On 2/13/22 22:30, David Chmelik wrote:
> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>
> root@cosmos:~# mount ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso /scd -o loop
> mount: /scd: can't read superblock on /dev/loop0.

using the same file, in Slackware-15.0:

# mount -o loop /0/dx/iso/slackware64-15.0-install-dvd.iso /mnt;ls /mnt
mount: /mnt: WARNING: source write-protected, mounted read-only.
ANNOUNCE.15.0 CRYPTO_NOTICE.TXT README.initrd SPEAK_INSTALL.TXT patches
CHANGES_AND_HINTS.TXT ChangeLog.txt README_CRYPT.TXT Slackware-HOWTO slackware64
CHECKSUMS.md5 EFI README_LVM.TXT UPGRADE.TXT testing
CHECKSUMS.md5.asc FILELIST.TXT README_RAID.TXT extra usb-and-pxe-installers
COPYING GPG-KEY README_UEFI.TXT isolinux
COPYING3 PACKAGES.TXT RELEASE_NOTES kernels
COPYRIGHT.TXT README.TXT SPEAKUP_DOCS.TXT pasture

I would check the file and maybe try a couple of other mountpoints

--
Slackware 15.0, Kernel=5.15.19 on x86_64,
DM=Unknown, DE=XFCE, ST=tty,grub2, GPT, BIOS-boot

Re: can't mount ISO on loop

<suhvf7$haj$1@gioia.aioe.org>

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From: dchmelik@gmail.com (David Chmelik)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Wed, 16 Feb 2022 04:44:24 -0000 (UTC)
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 by: David Chmelik - Wed, 16 Feb 2022 04:44 UTC

On Mon, 14 Feb 2022 03:30:34 -0000 (UTC), David Chmelik wrote:

> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>
> root@cosmos:~# mount
> ware/slackware/slackware64-15.0-iso/slackware64-15.0-
> install-dvd.iso /scd -o loop mount: /scd: can't read superblock on
> /dev/loop0.

I had to 'zpool scrub home,' and then it worked.
If one replies, it's good to read previous replies. Someone didn't,
then suggested something already resolved.

Re: can't mount ISO on loop

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From: Henrik.Carlqvist@deadspam.com (Henrik Carlqvist)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Wed, 16 Feb 2022 06:28:34 -0000 (UTC)
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 by: Henrik Carlqvist - Wed, 16 Feb 2022 06:28 UTC

On Wed, 16 Feb 2022 04:44:24 +0000, David Chmelik wrote:

> On Mon, 14 Feb 2022 03:30:34 -0000 (UTC), David Chmelik wrote:
>
>> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>>
>> root@cosmos:~# mount
>> ware/slackware/slackware64-15.0-iso/slackware64-15.0- install-dvd.iso
>> /scd -o loop mount: /scd: can't read superblock on /dev/loop0.
>
> I had to 'zpool scrub home,' and then it worked.
> If one replies, it's good to read previous replies. Someone didn't,
> then suggested something already resolved.

I have no experience from zfs myself, but if I understand this solution
correctly you had your iso file on a zfs file system which somehow got
corrupted and needed fixing for you to be able to read the entire iso
file?

regards Henrik

Re: can't mount ISO on loop

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From: dchmelik@gmail.com (David Chmelik)
Newsgroups: alt.os.linux.slackware
Subject: Re: can't mount ISO on loop
Date: Wed, 16 Feb 2022 07:13:10 -0000 (UTC)
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 by: David Chmelik - Wed, 16 Feb 2022 07:13 UTC

On Wed, 16 Feb 2022 06:28:34 -0000 (UTC), Henrik Carlqvist wrote:

> On Wed, 16 Feb 2022 04:44:24 +0000, David Chmelik wrote:
>
>> On Mon, 14 Feb 2022 03:30:34 -0000 (UTC), David Chmelik wrote:
>>
>>> On Slackware64 15+current, I can no longer mount ISOs on loopback.
>>>
>>> root@cosmos:~# mount
>>> ware/slackware/slackware64-15.0-iso/slackware64-15.0- install-dvd.iso
>>> /scd -o loop mount: /scd: can't read superblock on /dev/loop0.
>>
>> I had to 'zpool scrub home,' and then it worked.
>> If one replies, it's good to read previous replies. Someone didn't,
>> then suggested something already resolved.
>
> I have no experience from zfs myself, but if I understand this solution
> correctly you had your iso file on a zfs file system which somehow got
> corrupted and needed fixing for you to be able to read the entire iso
> file?

Either that or because ZFS is broken in Linux kernel 5.16.n; I had to
switch back to 5.15.n (and when you boot if there's a problem it scrubs
anyway... I'm not sure that was really the problem but I was told to do
so,)

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