[mythtv-users] RAID using two drives per PATA channel ?

Andrew Herron andrew.herron at gmail.com
Tue Aug 1 12:35:54 UTC 2006

> There are two levels of recovery to consider here. If you have one
> drive per channel, you can usually just replace the failed drive and
> everything works. Note that if you have to plug in PCI cards to get
> more IDE ports, some of these cards can be taken down by a single
> failed drive even if the drives are connected to separate interfaces.
> If you want to make sure your data can be recovered, but you don't
> mind working for it on a rare occasion that a disk fails, you can
> always recover from a two-disk temporary failure by recreating the
> RAID, as long as you have recorded the proper order of disks in mdadm
> command. Also be sure that you know which drive corresponds to which
> drive letter (not a problem for ATA on the motherboard, but if you
> plug in PCI cards it can be uncertain): if you unplug the wrong drive
> you now have a two-disk failure.

So Software raid-1 using 2 drives on the same cable is ok, as long as
you're careful to properly identify the dead drive before rebuilding?
I've only ever experienced mechanical failure in my drives, I wasn't
aware of the damage electrical failure can cause.


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