[mythtv-users] Linux software raid question

John Drescher drescherjm at gmail.com
Wed Jun 11 13:29:59 UTC 2008

> I know, but what happens when a drive fails.  I switched to hardware RAID
> not because of runtime performance, but because of ease of recovery in
> failure.  It does not matter if the partitions are mirrored.  Either you
> have the bootloader in the MBR, or on the boot sector of an individual
> partition. The BIOS will only point to a single bootloader and if the drive
> with that fails, you must go into BIOS and change it.
The  bios will choose the next drive. And all drives have the boot
loader on them and also all drives have a MBR.

>> I call this an advantage over hardware. I mean I get  my 256 MB boot
>> and my 50GB / back under full raid level in a less than 30 minutes
>> instead of waiting for hours..
>> I don't wait for hours if the drive was properly shut down.  When I did
>> software, that took a long time too if you did not properly shut things
>> down.
> Here I am talking about when replacing a bad drive. On software raid,
> I do not see any of these shutdown problems anymore. How many times
> does a linux system that is connected to a UPS not properly shut down?
> For me this is a less frequently than replacing a bad drive.
> So your saying SW RAID resyncs faster than HW RAID?
No I am saying you can get your OS back to the correct raid level much
faster though because it will be a much smaller part of the array.


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