[mythtv-users] Question re: available SATA ports and linux software RAID

Robin Hill myth at robinhill.me.uk
Fri Apr 8 08:05:24 UTC 2011

On Fri Apr 08, 2011 at 08:05:18 +0100, Simon Hobson wrote:

> As to sizes, this is an easy one to get caught by - and some hardware 
> RAID controllers really don't help by only allowing you to use the 
> whole disk. If you replace a disk, then the new disk must be NO 
> SMALLER AT ALL than the smallest disk in the set (or allow you to 
> create a partition which is no smaller than the smallest partition 
> used in the set).
> I have been caught by this in the past - drive fails in server, call 
> up support company and they send out a new drive, but it won't work. 
> Spend several days explaining to several different people that "yes 
> it's a 9G drive, but it's smaller than the 9G drive that's failed, 
> the replacement needs to be no smaller than <x> blocks". IIRC it took 
> them about a week to source a replacement that wasn't slightly 
> smaller - which was a "slightly worrying" time as there were errors 
> starting to appear on several other drives and I think we ended up 
> replacing about 4 before we'd done. I think we started doing mid-day 
> backups of the data during that time as this server basically 
> supported everything the company did (accounts, sales order 
> processing, stock control, goods in, manufacturing processing, etc, 
> etc, etc).
Fortunately this isn't a problem any more - all recent drives (I can't
remember exactly when they started - somewhere in the 250-500GB range I
think) use standard sizes across all manufacturers, so any 2TB drive
will serve as a replacement for any other.

    ( ' }     |       Robin Hill        <myth at robinhill.me.uk>  |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |
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