[linux-lvm] vgscan fails to find VGs

[Heinz J . Mauelshagen]

On Wed, Jul 25, 2001 at 01:51:37PM +0200, Terje Eggestad wrote:
> NB: I'm using 0.9.1 B2 in case this problem is already fixed!
> (also RH 7.1 with stock 2.4.3).
> 
> But since At the bottom of http://www.sistina.com/lvm/doc/KNOWN_BUGS
> is says:
> 
> - there still seems to be a rare condition when vgscan(8) fails
>   to find your VGs.
>   Basically you only need to run vgscan if your disk
>   configuration changed or your lost your /etc/lvmtab* entries.
> 
> So it still may not be fixed.
> 
> Anyway i figured out that vgscan fails if there is a CD in the CD
> player, doesn't matter if's a audio or iso9660 CD.
> 

That error is only returned, if the read from the device fails (the CD ro drive)
and pv_read_all_pv() continues with looping through all found device specials.

After the loop the return code is zeroed *if* at least one PV has been found,
which should be the case (I assume you use a partition on hda as a PV).

Shouldn't make it fail.

In regard to your debug output:

What is XXX in the lines 
"pv_read_all_pv -- avoiding multiple entries"
in case of MD; np: XXX"? (np is the number of found PVs before deleting multiple
entries in the list of PVs).

What is YYY in the line "pv_read_all_pv -- LEAVING with ret: YYY"?

Regards,
Heinz    -- The LVM Guy --

> if you run vgscan -d 
> you get way down:
> <333> pv_read -- going to read /dev/hdc
> <333> pv_read -- LEAVING with ret: -282
> <22> pv_read_all_pv -- pv_read returned: -282
> 
> I only have hda and hdc, no scsi. 
> 
> TJ
> 
> --
> _________________________________________________________________________
> 
> Terje Eggestad                  terje.eggestad at scali.no
> Scali Scalable Linux Systems    http://www.scali.com
> 
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*** 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 at Sistina.com                           +49 2626 141200
                                                       FAX 924446
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