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disks and fstab
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finottiOffline
Post subject: disks and fstab  PostPosted: 05.11.2010, 17:27



Joined: 2010-09-12
Posts: 467

Status: Offline
Dear all,

I've been getting some strange messages when booting and shutting down.

When I booting a see very quickly passing messages about "mount", but
they pass to fast to see. (The "break/pause" key doesn't work.) I could
not find these messages with "dmesg" or in "/var/log/syslog"... (BTW,
Is there another place to find these messages from boot and shutdown.
This is independent of this problem. It's just something I'd like to
know for the future.)


One message that I see is something like "/dev/sda6" not found or could
not write... (I am sorry I can't be more precise.)

Since I changed the default fstab, I thought I had messed it up
somehow. (This is a new installation, but up to date.)

Here are the details:

      Code:

root@debian[/home/finotti]# infobash -v3
Host/Kernel/OS  "debian" running Linux 2.6.36-0.slh.3-aptosid-amd64 x86_64 [ aptosid 2010-02 Κῆρες - kde-full - (201009132215) ]                   
CPU Info        (1) Intel Core2 Duo E8400 @ 6144 KB cache flags( sse3 ht nx lm vmx ) clocked at [ 3000.030 MHz ]                                   
                (2) Intel Core2 Duo E8400 @ 6144 KB cache flags( sse3 ht nx lm vmx ) clocked at [ 3000.030 MHz ]                                   
Videocard       nVidia G86 [GeForce 8500 GT]  X.Org 1.7.7  [ 1366x768@50.0hz ]                                                                     
Network cards   nVidia MCP55                                             
                nVidia MCP55                                             
Processes 175 | Uptime 1day | Memory 1226.9/8005.5MB | HDD
ST3500320AS,WDC WD1500ADFD-0,WDC WD1001FALS-0,ST31000528AS Size 2650GB
(28%used) | GLX Renderer NVS 3100M/PCI/SSE2 | GLX Version 3.2.0 NVIDIA
195.36.31 | Client Shell | Infobash v3.34


Here is the original fstab:

      Code:

root@debian[/home/finotti]# cat /etc/fstab.original
/dev/disk/by-uuid/0A58C78B58C773CB            /media/disk1part1    ntfs       auto,users,ro,dmask=0022,fmask=0133,nls=utf8 0 0
/dev/disk/by-uuid/47B3-8E25    /media/disk1part2    vfat       auto,users,rw,quiet,umask=000,shortname=lower 0 0
UUID=593c3d69-8d44-4320-a144-ba03d1da0f9b     /media/disk1part3    ext3       auto,users,rw,exec,noatime 0 0
UUID=e7c45146-fa48-4c05-8fe8-ae8fdfa35929     /home                ext3       defaults,noatime,errors=remount-ro 0 2
/dev/sda6            none                 swap       sw 0 0
/dev/disk/by-uuid/B66C5FB26C5F6C5D            /media/disk2part1    ntfs       auto,users,ro,dmask=0022,fmask=0133,nls=utf8 0 0
UUID=2d1914be-f48c-4206-9c69-be2757799f13     /                    ext4       defaults,noatime,errors=remount-ro,barrier=0 0 1
/dev/sdb3            none                 swap       sw 0 0
UUID=1e2b1265-00f7-4a71-8a5a-c8e33345b06c     /media/disk3part1    ext3       auto,users,rw,exec,noatime 0 0
UUID=e64aefeb-c791-4f33-9aee-b6237aba4a3e     /media/disk4part1    ext4       auto,users,rw,exec,noatime 0 0


Here is the new one:
      Code:

root@debian[/home/finotti]# cat /etc/fstab
/dev/disk/by-uuid/0A58C78B58C773CB            /media/winroot    ntfs       auto,users,ro,dmask=0022,fmask=0133,nls=utf8 0 0
/dev/disk/by-uuid/47B3-8E25    /media/fat    vfat       auto,users,rw,quiet,umask=000,shortname=lower 0 0
UUID=593c3d69-8d44-4320-a144-ba03d1da0f9b     /home                ext3       defaults,noatime,errors=remount-ro 0 2
UUID=e7c45146-fa48-4c05-8fe8-ae8fdfa35929     /media/disk1part5    ext3       noauto,users,rw,exec,noatime 0 0
/dev/sda6            none                 swap       sw 0 0
/dev/disk/by-uuid/B66C5FB26C5F6C5D            /media/winfiles    ntfs       auto,users,ro,dmask=0022,fmask=0133,nls=utf8 0 0
UUID=54009e41-822a-4e3a-90a9-d0eca6313048     /                    ext4       defaults,noatime,errors=remount-ro,barrier=0 0 1
/dev/sdb3            none                 swap       sw 0 0
UUID=1e2b1265-00f7-4a71-8a5a-c8e33345b06c     /media/media    ext3       auto,users,rw,exec,noatime 0 0
UUID=e64aefeb-c791-4f33-9aee-b6237aba4a3e     /media/data    ext4       auto,users,rw,exec,noatime 0 0
sshfs#finotti@agnesi.math.utk.edu:. /home/finotti/utk    fuse    user,noauto 0 0


Note that i both the swap partitions have no UUIDs:

      Code:

root@debian[/home/finotti]# ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 Nov  4 05:56 0A58C78B58C773CB -> ../../sda1
lrwxrwxrwx 1 root root 10 Nov  4 05:56 1e2b1265-00f7-4a71-8a5a-c8e33345b06c -> ../../sdc1                                                           
lrwxrwxrwx 1 root root 10 Nov  4 05:56 2d1914be-f48c-4206-9c69-be2757799f13 -> ../../sdb2                                                           
lrwxrwxrwx 1 root root 10 Nov  4 05:56 47B3-8E25 -> ../../sda2
lrwxrwxrwx 1 root root 10 Nov  4 05:56 593c3d69-8d44-4320-a144-ba03d1da0f9b -> ../../sda3                                                           
lrwxrwxrwx 1 root root 10 Nov  4 05:56 B66C5FB26C5F6C5D -> ../../sdb1
lrwxrwxrwx 1 root root 10 Nov  4 05:56 e64aefeb-c791-4f33-9aee-b6237aba4a3e -> ../../sdd1                                                           
lrwxrwxrwx 1 root root 10 Nov  4 05:56 e7c45146-fa48-4c05-8fe8-ae8fdfa35929 -> ../../sda5


(They do have IDs.) I don't know why, as the swap partition of my
laptop does. Is this a sign of some problem? (They do have IDs,
though. Should I use them instead?)

Here is fdisk -l:

      Code:

root@debian[/home/finotti]# fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x69205244

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        3648    29302528+   7  HPFS/NTFS
/dev/sda2            6375       38244   255995775    b  W95 FAT32
/dev/sda3           38245       60801   181189102+  83  Linux
/dev/sda4            3649        6374    21896595    5  Extended
/dev/sda5   *        3649        6255    20940696   83  Linux
/dev/sda6            6256        6374      955836   82  Linux swap / Solaris

Partition table entries are not in disk order

Disk /dev/sdb: 150.0 GB, 150039945216 bytes
255 heads, 63 sectors/track, 18241 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0f80b796

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1        7649    61440561    7  HPFS/NTFS
/dev/sdb2            7650       17221    76887090   83  Linux
/dev/sdb3           17222       18241     8193150   82  Linux swap / Solaris

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0007c0c7

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1      121601   976760001   83  Linux

Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00004647

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      121601   976760001   83  Linux


All partitions seem to be working, though, but the messages (especially
since I cannot read them) are getting me a bit worried.

Any help with any of these issued would be appreciated.

Best to all,

Luis
 
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diblOffline
Post subject:   PostPosted: 05.11.2010, 19:00



Joined: 2010-09-12
Posts: 302
Location: Dayton, Ohio, USA
Status: Offline
If I am reading it correctly, the UUID of your root partition was changed, from the original /etc/fstab file, to the new one. Why would that be? Can you confirm that it is still correct (as root) with

      Code:
ls -l /dev/disk/by-uuid
 
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finottiOffline
Post subject:   PostPosted: 05.11.2010, 20:16



Joined: 2010-09-12
Posts: 467

Status: Offline
That is very odd!

Well, the result of "ls -l /dev/disk/by-uuid" was in the original post. Root should be the one in the original. The UUID of the root partition in my new file doesn't even seem to exist, and I have no idea how I got it. (What I did wan get a copy of the original and just change the mounting points...) It is surprising that I can boot at all.

Thank you dibl so much for finding this. I will fix it and see if it fixes the problem.

Best to all,

Luis
 
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x-un-i
Post subject:   PostPosted: 05.11.2010, 20:55
Team Member


Joined: 2010-08-26
Posts: 170
If you boot to runlevel 3

( enter e on grub and then edit the kernel line ( the one with "linux /boot...") and add at the end 3 - after that press Ctrl-X to boot.

then you can scroll up and down over the most part of the boot messages (use Shift+PgUp/PgDn)[/b]

_________________
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finottiOffline
Post subject:   PostPosted: 08.11.2010, 16:14



Joined: 2010-09-12
Posts: 467

Status: Offline
OK, thanks all for the help.

Indeed getting the correct root directory in fstab solved the error messages about mount on boot.

I still get some messages regarding /dev/sda6... Thanks yo x-un-i, I can read them, but forgot to write it down. I will check again when I can reboot.

Thanks,

Luis
 
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finottiOffline
Post subject:   PostPosted: 11.11.2010, 12:33



Joined: 2010-09-12
Posts: 467

Status: Offline
OK, the message I've been getting is from initramfs. Here is what I've got with a DU:

      Code:

update-initramfs: Generating /boot/initrd.img-2.6.36-0.slh.3-aptosid-amd64
/etc/initramfs-tools/conf.d/resume: 1: /dev/sda6: Permission denied


As you can see from the original post, sda6 is a swap partition. Changing it to the other one (which would be the prefered) /dev/sdb3 gives the same error (with /dev/sdb3 instead, of course). It seems that I do have swap, though:

      Code:

root@debian[~]# free
             total       used       free     shared    buffers     cached
Mem:       8197648    1418132    6779516          0     111536     600548
-/+ buffers/cache:     706048    7491600
Swap:      9148976          0    9148976


Here are the permissions:

      Code:

root@debian[~]# ls -l /dev/sda6 /dev/sdb3
brw-rw---- 1 root disk 8,  6 Nov 11 06:51 /dev/sda6
brw-rw---- 1 root disk 8, 19 Nov 11 06:51 /dev/sdb3


So, here are my questions:


    1) Why am I getting the "permission denied" warning?

    2) Why do the swap partitions have no UUID? (Is it normal?)

    3) Is there a different way (than what x-un-i suggested) to read boot/shutdown messages?


Thanks to all,

Luis
 
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diblOffline
Post subject:   PostPosted: 11.11.2010, 23:53



Joined: 2010-09-12
Posts: 302
Location: Dayton, Ohio, USA
Status: Offline
Something is definitely wrong -- the swap partition should have a UUID same as the others. Here is my list, for example:


      Code:
don@sidbox:~$ ls -l /dev/disk/by-uuid
total 0
lrwxrwxrwx 1 root root 10 Nov 11  2010 0c423529-961e-4526-8016-c14da6f1a863 -> ../../sdb3
lrwxrwxrwx 1 root root 10 Nov 11  2010 1e908a65-7ddb-4a1f-9913-d5a82ddb3137 -> ../../sda2
lrwxrwxrwx 1 root root 10 Nov 11  2010 2b7ce29a-4550-4c6f-9171-8406d9688da7 -> ../../sdb1
lrwxrwxrwx 1 root root 10 Nov 11  2010 8cfacbec-2b8a-43e0-b499-7aaf721a4330 -> ../../sda6
lrwxrwxrwx 1 root root 10 Nov 11  2010 8f03cf64-35dd-4d7f-b055-2d42aa291028 -> ../../sdc2
lrwxrwxrwx 1 root root 10 Nov 11  2010 932854dc-d16b-4612-9bd7-37345d1def09 -> ../../sda4
lrwxrwxrwx 1 root root 10 Nov 11  2010 a1934295-3ff7-4700-901a-637513a74cfa -> ../../sdc3
lrwxrwxrwx 1 root root 10 Nov 11  2010 b69c6415-23e4-4e96-9f72-17d2d7736b93 -> ../../sdb2
lrwxrwxrwx 1 root root 10 Nov 11  2010 bef7fc54-d120-4869-920c-edc64a214bae -> ../../sda3
lrwxrwxrwx 1 root root 10 Nov 11  2010 dfd5d21c-b8d7-4dd7-8d44-ac3146008354 -> ../../sdc1
lrwxrwxrwx 1 root root 10 Nov 11  2010 ec17a5f9-d3b5-4332-97c5-af3074aa0904 -> ../../sda5


See that /dev/sdc2 is my swap partition:

      Code:
root@sidbox:/home/don# blkid
/dev/sda2: LABEL="MUSIC" UUID="1e908a65-7ddb-4a1f-9913-d5a82ddb3137" TYPE="ext4"
/dev/sda3: LABEL="DOCS&PIX" UUID="bef7fc54-d120-4869-920c-edc64a214bae" TYPE="ext4"
/dev/sda4: LABEL="VIDEOS" UUID="932854dc-d16b-4612-9bd7-37345d1def09" TYPE="ext4"
/dev/sda5: UUID="ec17a5f9-d3b5-4332-97c5-af3074aa0904" TYPE="ext4"
/dev/sda6: UUID="8cfacbec-2b8a-43e0-b499-7aaf721a4330" UUID_SUB="0ef90973-f1b1-43a1-94ed-c3e1e79636e6" TYPE="btrfs"
/dev/sdb1: LABEL="DOCSPIXBAK" UUID="2b7ce29a-4550-4c6f-9171-8406d9688da7" TYPE="jfs"
/dev/sdb2: LABEL="MUSICBAK" UUID="b69c6415-23e4-4e96-9f72-17d2d7736b93" TYPE="jfs"
/dev/sdb3: LABEL="BTRFSTEST" UUID="0c423529-961e-4526-8016-c14da6f1a863" UUID_SUB="0e0252d9-b2ff-445c-9d61-3685c5ab411c" TYPE="btrfs"
/dev/sdc1: LABEL="SIDUX" UUID="dfd5d21c-b8d7-4dd7-8d44-ac3146008354" TYPE="jfs"
/dev/sdc2: UUID="8f03cf64-35dd-4d7f-b055-2d42aa291028" TYPE="swap"
/dev/sdc3: LABEL="WHATEVER" UUID="a1934295-3ff7-4700-901a-637513a74cfa" TYPE="ext4"
 
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