[mythtv-users] RAID 1 mirror with mythtv backend???

Robin Hill myth at robinhill.me.uk
Wed Jan 23 16:40:15 UTC 2019


On Wed Jan 23, 2019 at 11:31:45AM -0500, James Abernathy wrote:

> I know others have used RAID mirrors on their mythtv backend. I have had 
> my latest system running with 2 RAID 1 mirrors (4 drives) for about a 
> year. Besides general file serving I have /mnt/recordings-tv1 on one 
> mirror and /mnt/recordings-tv2 on the other. I have both the 
> /mnt/recordings-tv1 and 2 defined in the volumes section mythtv-setup.
> 
> I had a drive fail last spring and replaced it and added the new one 
> back into the mirror with no problems after recovering.
> 
> But lately I've started to have a mdadm failure about every 2-3 weeks.  
> At first I thought it might be the fact that my latest batch of drives 
> were Toshiba P300 desktop drives.  Once I remove the drive I ran 
> Spinrite 6 on them that reads and writes every sector on the drive.  It 
> found no errors.
> 
> This has happened twice with the Toshiba drives.  I order some Seagate 
> Iron Wolf server drives made for NAS usage. In fact I had to put one 
> into service today.  I'm recovering the mirror now.
> 
> What are the opinions on using RAID mirrors for mythtv recordings. Does 
> that cause more problems than it's worth?? I'm debating going back to a 
> 2 drive mirror for general NAS usage just for home data storage where 
> the activity is very low. And then having a mythtv box just for backend 
> with 2 drives just for recordings.
> 
> I'm getting tired of replacing drives.  I'm am grateful about not losing 
> any data so far, but it's becoming a pain.
> 
> 
> Thoughts?
> 
I don't think mythtv usage should cause any more problems than anything
else. If you've just started getting issues following a drive
replacement, it sounds like you may have a timeout issue (see
https://raid.wiki.kernel.org/index.php/Timeout_Mismatch).

Cheers,
    Robin

-- 
     ___        
    ( ' }     |       Robin Hill        <myth at robinhill.me.uk>  |
   / / )      | Little Jim says ....                            |
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