FAQ
Hi,

some time ago I removed some physical disks from a server and now I'm
still getting dmesg messages like:

sd 0:2:2:0: SCSI error: return code = 0x00040001
end_request: I/O error, dev sdc, sector 0

And all lvm tools still grumbel about that disks too:

/dev/sdb: read failed after 0 of 4096 at 0: Eingabe-/Ausgabefehler
/dev/sdb: read failed after 0 of 4096 at 1746969493504:
Eingabe-/Ausgabefehler


How may I tell the lvm and the system, that it is ok that this disk do
not exist any more?

Thnaks for hints and suggestion . G?tz
--
G?tz Reinicke
IT-Koordinator

Tel. +49 7141 969 420
Fax +49 7141 969 55 420
E-Mail goetz.reinicke at filmakademie.de

Filmakademie Baden-W?rttemberg GmbH
Akademiehof 10
71638 Ludwigsburg
www.filmakademie.de

Eintragung Amtsgericht Stuttgart HRB 205016

Vorsitzender des Aufsichtsrats:
J?rgen Walter MdL
Staatssekret?r im Ministerium f?r Wissenschaft,
Forschung und Kunst Baden-W?rttemberg

Gesch?ftsf?hrer:
Prof. Thomas Schadt

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  • Philippe Naudin at Oct 28, 2011 at 9:26 am

    Le ven 28 oct 2011 14:08:50 CEST, G?tz Reinicke a ?crit:

    Hi,

    some time ago I removed some physical disks from a server and now I'm
    still getting dmesg messages like:

    sd 0:2:2:0: SCSI error: return code = 0x00040001
    end_request: I/O error, dev sdc, sector 0

    And all lvm tools still grumbel about that disks too:

    /dev/sdb: read failed after 0 of 4096 at 0: Eingabe-/Ausgabefehler
    /dev/sdb: read failed after 0 of 4096 at 1746969493504:
    Eingabe-/Ausgabefehler


    How may I tell the lvm and the system, that it is ok that this disk do
    not exist any more?
    If a software RAID has been removed, don't forget :
    mdadm --misc --zero-superblock /dev/sdX
    where sdX is every disk that was part of the RAID.


    --
    Philippe Naudin
    UMR MISTEA : Math?matiques, Informatique et STatistique pour
    l'Environnement et l'Agronomie
    INRA, b?timent 29 - 2 place Viala - 34060 Montpellier cedex 2
    t?l: 04.99.61.26.34, fax: 04.99.61.29.03, m?l: naudin at supagro.inra.fr
  • Richard Mollel at Oct 28, 2011 at 12:10 pm
    Just reread your post again....
    Actually, "cat /proc/partitions", if the said partitions/disks are still being seen by kernel, you will need some sort of system scan to get rid of them, or a reboot.
    I have a SAN, and qlogic card as HBA, qlogic has a tool for scanning for non-existent partitions and remove them...
    http://filedownloads.qlogic.com/files/ms/56615/readme_dynamic_lun_22.html
    and with qlogic, I could have removed the non-existent LUNs via the option refresh:
    -r, --refresh
    ??????????????????????? To refresh, that is remove LUNs that are lost
    ??????????????????????? use the options "-r|--refresh". This will
    ??????????????????????? remove the LUNs which no more exist.
    How were these disks attached to your system?




    ----- Original Message -----
    From: Philippe Naudin <philippe.naudin at supagro.inra.fr>
    To: CentOS mailing list <centos at centos.org>
    Cc:
    Sent: Friday, October 28, 2011 9:26 AM
    Subject: Re: [CentOS] read failed after messages of non existing harddisks
    Le ven 28 oct 2011 14:08:50 CEST, G?tz Reinicke a ?crit:

    Hi,

    some time ago I removed some physical disks from a server and now I'm
    still getting dmesg messages like:

    sd 0:2:2:0: SCSI error: return code = 0x00040001
    end_request: I/O error, dev sdc, sector 0

    And all lvm tools still grumbel about that disks too:

    /dev/sdb: read failed after 0 of 4096 at 0: Eingabe-/Ausgabefehler
    ? /dev/sdb: read failed after 0 of 4096 at 1746969493504:
    Eingabe-/Ausgabefehler


    How may I tell the lvm and the system, that it is ok that this disk do
    not exist any more?
    If a software RAID has been removed, don't forget :
    ? mdadm --misc --zero-superblock /dev/sdX
    where sdX is every disk that was part of the RAID.


    --
    Philippe Naudin
    UMR MISTEA : Math?matiques, Informatique et STatistique pour
    l'Environnement et l'Agronomie
    INRA, b?timent 29? -? 2 place Viala? -? 34060 Montpellier cedex 2
    t?l: 04.99.61.26.34, fax: 04.99.61.29.03, m?l: naudin at supagro.inra.fr
    _______________________________________________
    CentOS mailing list
    CentOS at centos.org
    http://lists.centos.org/mailman/listinfo/centos
  • Götz Reinicke at Oct 31, 2011 at 5:37 am
    Hi,

    a cat /proc/partitions shows the two disks. They were direct connected
    to an scsi port. (Old ide 2 scsi Raids).

    I disconnected tham a long time ago and never worried about the errors,
    as the system was up and running very smooth.

    But now I connect other iscsi systems and the dmes and log is not that
    easy to monitor with all the unneded messages ...

    Anny idea, how to remove that partitions with the redhat tools?

    Regards . G?tz


    Am 28.10.11 18:10, schrieb Richard Mollel:
    Just reread your post again....
    Actually, "cat /proc/partitions", if the said partitions/disks are still being seen by kernel, you will need some sort of system scan to get rid of them, or a reboot.
    I have a SAN, and qlogic card as HBA, qlogic has a tool for scanning for non-existent partitions and remove them...
    http://filedownloads.qlogic.com/files/ms/56615/readme_dynamic_lun_22.html
    and with qlogic, I could have removed the non-existent LUNs via the option refresh:
    -r, --refresh
    To refresh, that is remove LUNs that are lost
    use the options "-r|--refresh". This will
    remove the LUNs which no more exist.
    How were these disks attached to your system?




    ----- Original Message -----
    From: Philippe Naudin <philippe.naudin at supagro.inra.fr>
    To: CentOS mailing list <centos at centos.org>
    Cc:
    Sent: Friday, October 28, 2011 9:26 AM
    Subject: Re: [CentOS] read failed after messages of non existing harddisks
    Le ven 28 oct 2011 14:08:50 CEST, G?tz Reinicke a ?crit:

    Hi,

    some time ago I removed some physical disks from a server and now I'm
    still getting dmesg messages like:

    sd 0:2:2:0: SCSI error: return code = 0x00040001
    end_request: I/O error, dev sdc, sector 0

    And all lvm tools still grumbel about that disks too:

    /dev/sdb: read failed after 0 of 4096 at 0: Eingabe-/Ausgabefehler
    /dev/sdb: read failed after 0 of 4096 at 1746969493504:
    Eingabe-/Ausgabefehler


    How may I tell the lvm and the system, that it is ok that this disk do
    not exist any more?
    If a software RAID has been removed, don't forget :
    mdadm --misc --zero-superblock /dev/sdX
    where sdX is every disk that was part of the RAID.

    --
    G?tz Reinicke
    IT-Koordinator

    Tel. +49 7141 969 420
    Fax +49 7141 969 55 420
    E-Mail goetz.reinicke at filmakademie.de

    Filmakademie Baden-W?rttemberg GmbH
    Akademiehof 10
    71638 Ludwigsburg
    www.filmakademie.de

    Eintragung Amtsgericht Stuttgart HRB 205016

    Vorsitzender des Aufsichtsrats:
    J?rgen Walter MdL
    Staatssekret?r im Ministerium f?r Wissenschaft,
    Forschung und Kunst Baden-W?rttemberg

    Gesch?ftsf?hrer:
    Prof. Thomas Schadt
  • Richard Mollel at Oct 31, 2011 at 1:46 pm
    I would assume you have rebooted since removing the drives, in which case they should not be seen by "cat /proc/partition", which is a representation of scanned disks during bootup, unless you have other drives still connected that you are not aware of? "cat /proc/scsi/scsi" should help in narrowing down which devices you are actually looking at.

    To bridge the gap when what partitions and scsi/scsi is showing, install package (if not there already) "lsscsi" and run command lsscsi.
    Sample output:
    $ lsscsi
    [0:0:6:0]??? process PE/PV??? 1x3 SCSI BP????? 1.1?? -??????
    [0:2:0:0]??? disk??? MegaRAID LD 0 RAID1? 139G 422D? /dev/sda
    [1:0:0:0]??? mediumx COMPAQ?? MSL5000 Series?? 0520? -??????
    [1:0:1:0]??? tape??? COMPAQ?? SDLT320????????? 5F5F? /dev/st0
    [1:0:2:0]??? tape??? COMPAQ?? SDLT320????????? 5F5F? /dev/st1





    ----- Original Message -----
    From: G?tz Reinicke <goetz.reinicke at filmakademie.de>
    To: CentOS mailing list <centos at centos.org>
    Cc:
    Sent: Monday, October 31, 2011 5:37 AM
    Subject: Re: [CentOS] read failed after messages of non existing harddisks

    Hi,

    a cat /proc/partitions shows the two disks. They were direct connected
    to an scsi port. (Old ide 2 scsi Raids).

    I disconnected tham a long time ago and never worried about the errors,
    as the system was up and running very smooth.

    But now I connect other iscsi systems and the dmes and log is not that
    easy to monitor with all the unneded messages ...

    Anny idea, how to remove that partitions with the redhat tools?

    ??? Regards . G?tz


    Am 28.10.11 18:10, schrieb Richard Mollel:
    Just reread your post again....
    Actually, "cat /proc/partitions", if the said partitions/disks are still being seen by kernel, you will need some sort of system scan to get rid of them, or a reboot.
    I have a SAN, and qlogic card as HBA, qlogic has a tool for scanning for non-existent partitions and remove them...
    http://filedownloads.qlogic.com/files/ms/56615/readme_dynamic_lun_22.html
    and with qlogic, I could have removed the non-existent LUNs via the option refresh:
    -r, --refresh
    ? ? ? ? ? ? ? ? ? ? ? ? To refresh, that is remove LUNs that are lost
    ? ? ? ? ? ? ? ? ? ? ? ? use the options "-r|--refresh". This will
    ? ? ? ? ? ? ? ? ? ? ? ? remove the LUNs which no more exist.
    How were these disks attached to your system?




    ----- Original Message -----
    From: Philippe Naudin <philippe.naudin at supagro.inra.fr>
    To: CentOS mailing list <centos at centos.org>
    Cc:
    Sent: Friday, October 28, 2011 9:26 AM
    Subject: Re: [CentOS] read failed after messages of non existing harddisks
    Le ven 28 oct 2011 14:08:50 CEST, G?tz Reinicke a ?crit:

    Hi,

    some time ago I removed some physical disks from a server and now I'm
    still getting dmesg messages like:

    sd 0:2:2:0: SCSI error: return code = 0x00040001
    end_request: I/O error, dev sdc, sector 0

    And all lvm tools still grumbel about that disks too:

    /dev/sdb: read failed after 0 of 4096 at 0: Eingabe-/Ausgabefehler
    ? ? /dev/sdb: read failed after 0 of 4096 at 1746969493504:
    Eingabe-/Ausgabefehler


    How may I tell the lvm and the system, that it is ok that this disk do
    not exist any more?
    If a software RAID has been removed, don't forget :
    ? mdadm --misc --zero-superblock /dev/sdX
    where sdX is every disk that was part of the RAID.

    --
    G?tz Reinicke
    IT-Koordinator

    Tel. +49 7141 969 420
    Fax? +49 7141 969 55 420
    E-Mail goetz.reinicke at filmakademie.de

    Filmakademie Baden-W?rttemberg GmbH
    Akademiehof 10
    71638 Ludwigsburg
    www.filmakademie.de

    Eintragung Amtsgericht Stuttgart HRB 205016

    Vorsitzender des Aufsichtsrats:
    J?rgen Walter MdL
    Staatssekret?r im Ministerium f?r Wissenschaft,
    Forschung und Kunst Baden-W?rttemberg

    Gesch?ftsf?hrer:
    Prof. Thomas Schadt


    _______________________________________________
    CentOS mailing list
    CentOS at centos.org
    http://lists.centos.org/mailman/listinfo/centos
  • Richard Mollel at Oct 28, 2011 at 12:01 pm
    Before you physically removed the disk, you were supposed to have done pvremove.
    you can try pvdisplay/pvscan and see if these disks are displayed there, before trying a pvremove on them again.
    I assume the said disks were properly remove from any lv,vg that you had.



    ----- Original Message -----
    From: G?tz Reinicke <goetz.reinicke at filmakademie.de>
    To: CentOS mailing list <centos at centos.org>
    Cc:
    Sent: Friday, October 28, 2011 8:08 AM
    Subject: [CentOS] read failed after messages of non existing harddisks

    Hi,

    some time ago I removed some physical disks from a server and now I'm
    still getting dmesg messages like:

    sd 0:2:2:0: SCSI error: return code = 0x00040001
    end_request: I/O error, dev sdc, sector 0

    And all lvm tools still grumbel about that disks too:

    /dev/sdb: read failed after 0 of 4096 at 0: Eingabe-/Ausgabefehler
    ? /dev/sdb: read failed after 0 of 4096 at 1746969493504:
    Eingabe-/Ausgabefehler


    How may I tell the lvm and the system, that it is ok that this disk do
    not exist any more?

    ??? Thnaks for hints and suggestion . G?tz
    --
    G?tz Reinicke
    IT-Koordinator

    Tel. +49 7141 969 420
    Fax? +49 7141 969 55 420
    E-Mail goetz.reinicke at filmakademie.de

    Filmakademie Baden-W?rttemberg GmbH
    Akademiehof 10
    71638 Ludwigsburg
    www.filmakademie.de

    Eintragung Amtsgericht Stuttgart HRB 205016

    Vorsitzender des Aufsichtsrats:
    J?rgen Walter MdL
    Staatssekret?r im Ministerium f?r Wissenschaft,
    Forschung und Kunst Baden-W?rttemberg

    Gesch?ftsf?hrer:
    Prof. Thomas Schadt


    _______________________________________________
    CentOS mailing list
    CentOS at centos.org
    http://lists.centos.org/mailman/listinfo/centos

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