Re: [linux-lvm] problem running vgscan..Is it a megaraid issue or an LVM issue ??

["Heinz J . Mauelshagen" <mauelshagen@sistina.com>]

Christian,

are the Megaraid devices all accessable (driver module loaded/linked in)
when vgscan runs on reboot?

On Thu, Jun 27, 2002 at 10:56:11AM +0200, christian e wrote:
> Hi,all
> 
> I posted this on the megaraid devel list thinking it was a megaraid 
> problem..But maybe it's LVM doing tricks..Here goes:
> 
> I've had problems with a volume group not showing up after a reboot..
> After booting up the volume group on the megaraid is not 
> detected.Running vgcfgrestore on the individual disks the volume group 
> can bring it back...That is until I run a vgscan resulting in this output:
> 
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- found active volume group "vg0"
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume 
> group

If you've got "vg1" online and then run vgscan and loose it again, I need
the "vgscan -d" output. Please send it to <mge@sistina.com> directly.

> 
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 0
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 2
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 4
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 6
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 0
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 2
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 4
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 6
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 0
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 2
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 4
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 6
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 0
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 2
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 4
> SCSI disk error : host 2 channel 2 id 0 lun 0 return code = 25040001
>   I/O error: dev 08:21, sector 6
> 
> these errors appear on the console after running it along with a lot of:
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer
> invalidate: busy buffer

That means that the buffers are still in use when LVM tries to invalidate
them. You can ignore these messages. They don't cause any harm to your data.
Later LVM driver versions avoid that invalidation.

Regards,
Heinz    -- The LVM Guy --


> 
> and the volume group vg1 is completely gone..It can be brought up again 
> like this:
> 
> vgcfgrestore -v -n vg1 /dev/sdb1
> vgcfgrestore -v -n vg1 /dev/sdc
> vgchange -ay
> 
> and then it's OK until vgscan is run...
> 
> setup:
> 
> Poweredge 2550
> 
> Megaraid (2 adapters)..from dmesg:
>   megaraid: v1.18 (Release Date: Thu Oct 11 15:02:53 EDT 2001
> )<5>megaraid: found 0x101e:0x1960:idx 0:bus 2:slot 0:func 0
> scsi1 : Found a MegaRAID controller at 0xf8805000, IRQ: 20
> scsi1 : Enabling 64 bit support
> megaraid: [161N:3.17] detected 1 logical drives
> megaraid: channel[1] is raid.
> megaraid: channel[2] is raid.
> megaraid: found 0x101e:0x1960:idx 1:bus 4:slot 0:func 0
> scsi2 : Found a MegaRAID controller at 0xf8807000, IRQ: 18
> scsi2 : Enabling 64 bit support
> megaraid: [161N:3.17] detected 1 logical drives
> megaraid: channel[1] is raid.
> megaraid: channel[2] is raid.
> scsi1 : LSI Logic MegaRAID 161N 254 commands 16 targs 5 chans 7 luns
> scsi2 : LSI Logic MegaRAID 161N 254 commands 16 targs 5 chans 7 luns
> 
> running Debian 2.2 with kernel 2.4.17
> lvm version 1.0.1
> 
> Anyone know what's going on with this ?? It's our main server so it's 
> not possible to boot very often..That's why I'd like to investigate all 
> possible options before trying to debug further..
> 
> best regards
> 
> Christian
> -- 
> Christian Ejstrup, IT Admin / RF Development Engineer
> Texas Instruments A/S, Denmark ,Sofiendalsvej 93,DK-9200 Aalborg SV,Denmark
> Phone:+45 96346868, Phone(direct):+45 96346860, GSM:+45 22234304
> 
> 
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
                                                       FAX 924446
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