"busy" disk trouble

ronald rwarsow at online.de
Sun Oct 1 20:06:04 UTC 2006


Michal Jaegermann wrote:
> On Sat, Sep 30, 2006 at 02:32:52AM +0200, ronald wrote:
>> Michal Jaegermann wrote:
>>>>> ??? Neither fuser, nor lsof, nor searches for anything else reveal
>>>>> why /dev/sdb1 could be "in use".
>> my disk was not accessible caused by a membership in a raid system month 
>> ago, but still containing a label/signature from that.
>> i could fdisk the drive, but couldn't not swap on it or delete/create 
>> partitions/file systems on it.
> 
> You were right that problems were caused by dmraid.  This is

good to hear !


> a "recycled" disk and I was not even really aware that in the past
> it was used in RAID. It turns out that mkinitrd adds such
> disk to dm map and after a boot every partition on such disk
> either "does not exist", even if it is there, or is "busy".
> All of that without a trace of a hint anywhere why there is a
> problem.  Talk about the least surprise!
> 
> It is not enough to remove that signature with 'dmraid -r -E ...'
> from such disk.  One has to rebuild mkinitrd as well before
> that disk becomes accesible.  Does some piece of documentation
> even mentions such things?  I am not aware so far.
> 
>    Michal

yes, documentation...?!,cause it's a tricky trap/feature.
i would opt to *feature* -it does the correct things-, but first it's a 
trap...

-- 
    ronald




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