Arch Linux

Yonk

Member

Registered: 2007-09-07

Posts: 27

2.6.32 - cant mount 3rd hdd

Hi
just had to downgrade to 2.6.31 since the new kernel didnt let me mount 2 partitions on my third hdd ...

mount: /dev/sda4 is not a valid block device

after downgrading everything worked again so i dont think its a problem with the disk itself.

would be great if someone had an idea.

Last edited by Yonk (2009-12-31 15:16:39)

azleifel

Member

Registered: 2007-10-28

Posts: 486

Re: 2.6.32 - cant mount 3rd hdd

What information does running

$ sudo sfdisk -l

provide about the problematic partition?

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

with 2.6.31

...
Disk /dev/sdc: 77825 cylinders, 255 heads, 63 sectors/track
Warning: extended partition does not start at a cylinder boundary.
DOS and Linux will interpret the contents differently.
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/sdc1          0+  25496-  25497- 204800000    7  HPFS/NTFS
/dev/sdc2      25496+  77824   52329- 420328288+   5  Extended
/dev/sdc3          0       -       0          0    0  Empty
/dev/sdc4          0       -       0          0    0  Empty
/dev/sdc5      25496+  77824   52329- 420328257   83  Linux
...

rebooting now to check 2.6.32

strange ... now everything works fine after i installed 2.6.32 again
maybe there was an error in 2.6.32-1 ?

Last edited by Yonk (2009-12-30 12:21:13)

chpln

Member

From: Australia

Registered: 2009-09-17

Posts: 361

Re: 2.6.32 - cant mount 3rd hdd

mount: /dev/sda4 is not a valid block device

Disk /dev/sdc:...

Is one of these a typo?  Even so, /dev/sdc4 seems equally invalid judging by the output of sfdisk.

Could you clarify this?  Perhaps I've misunderstood the problem.

Last edited by chpln (2009-12-30 12:56:11)

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

was a typo
should have read /dev/sdc5 and|or /dev/sdc1

jdarnold

Member

From: Medford MA USA

Registered: 2009-12-15

Posts: 485

Website

Re: 2.6.32 - cant mount 3rd hdd

It looks like maybe you had the same problem I had - the a/b/c device names change depending on random factors, thus throwing your fstab out of whack. Better to use the UUID of the drive, so the lettering no longer matters. Get the UUID for all your partitions via the 'blkid' command, then use "UUID=very-long-uuid" instead of "/dev/sda1" in your fstab. Then the lettering no longer is a problem.

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

problem is back today ... 2.6.32 sometimes just ignores the 3rd hdd ... or so it seems
open for suggestions again ...

jdarnold

Member

From: Medford MA USA

Registered: 2009-12-15

Posts: 485

Website

Re: 2.6.32 - cant mount 3rd hdd

Did you try using UUIDs instead of /dev names?

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

tried and failed ...
somehow the uuid changed after reboot (happend at least once)

jdarnold

Member

From: Medford MA USA

Registered: 2009-12-15

Posts: 485

Website

Re: 2.6.32 - cant mount 3rd hdd

You must be doing something wrong, because I don't believe the disk UUID ever changes, not even between OSes. The UUID for /dev/sdc1 might change, because the dev mapping is different, but for a particular partition, the UUID is not going to be different.

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

/dev/sda2: UUID="982252F62252D8B8" TYPE="ntfs"
/dev/sda3: UUID="95175034-e262-4a15-ae22-b1a5016b1f85" SEC_TYPE="ext2" TYPE="ext3"
/dev/sdb1: UUID="2620E26820E23F05" LABEL="New Volume" TYPE="ntfs"
/dev/sdb5: UUID="81c4402f-e76b-42d3-b532-d423be22eabd" TYPE="ext4"
/dev/sdc5: UUID="81c4402f-e76b-42d3-b532-d423be22eabd" TYPE="ext4"

copy/paste of blkid ... 2 partitions same uuid

azleifel

Member

Registered: 2007-10-28

Posts: 486

Re: 2.6.32 - cant mount 3rd hdd

Is /dev/sdc5 by any chance a clone of /dev/sdb5?

Edit: To change the UUID of an unmounted partition try:

$ sudo tune2fs -U random /dev/sd?N

Last edited by azleifel (2009-12-31 19:22:39)

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

no ... all seperate partitions
no mirroring
nothing ...

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,690

Website

Re: 2.6.32 - cant mount 3rd hdd

You tried UUIDs and /dev/names.  Have you tried labels?

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Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

didnt try labels ... the funny thing is ... even if i cant mount /dev/sdc5 ... it's still in /dev
so it seems it recognizes something

Yonk

Member

Registered: 2007-09-07

Posts: 27

Re: 2.6.32 - cant mount 3rd hdd

well ... worked for the last few days ...
but today after the update to 2.6.32-5 it again refuses to mount 2 of my partitions

mount: /dev/sdc5 is not a valid block device

even though the device exists in /dev
i would write a bug report but i dont know what to put in there ... could someone please help ?