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Re: Kernel Modules in Fedora -x



Les Mikesell wrote:
> Jarod Wilson wrote:
> 
>>> Do you know if a firewire drive will work reliably as a raid1 mirror
>>> with a matching internal drive?
>>
>> Not a clue, never tried.
>>
>>> With the older stack it isn't
>>> recognized in time at boot-up to automatically connect the md device.
>>
>> It is if you load the firewire modules in your initrd. :)
> 
> Hmmm, would that happen by itself if the drive is attached during an
> install with the new system?

I'm reasonably certain that's the case.

>>> You can add it and the re-sync generally works if the partition is not
>>> too busy, but it tends to be failed out of the array if it is left
>>> connected when the partition is very active.
>>
>> I wonder if the cfs scheduler would help with this any. And/or shutting
>> off beagle (which likes to absolutely slaughter the i/o on my
>> workstation).
> 
> The place I want it is as a 3rd member of a RAID1 set that is used for
> the pooled file storage for backuppc - which hardlinks all identical
> files it finds across your backup set.  This is extremely busy during
> backups and takes an impractically long time to copy with tar or other
> file-oriented means because of the way hardlinks are re-constructed
> (many days for a 250 gig drive), while a raid-sync will complete in a
> couple of hours.  There's probably a better way to do that now with LVM
> snapshots but that's getting off the topic of reliability.

Wait... So you're essentially creating a cloned volume on the firewire
disk via a raid resync, rather than having the initial backup written
with the firewire disk connected in the raid set? If so, that's
moderately amusing... :)

-- 
Jarod Wilson
jwilson redhat com


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