[K12OSN] New Building's LTSP Server

[Les Mikesell]

On 4/19/2011 4:57 PM, Rob Owens wrote:
> On Tue, Apr 19, 2011 at 11:19:03AM -0500, Les Mikesell wrote:
>> On 4/19/2011 11:05 AM, Terrell Prude' Jr. wrote:
>>>
>>> I am actually a fan of RAID 5 for a lot of situations, as I find it
>>> certainly fast enough for my purposes, plenty reliable, and very
>>> efficient with storage. But a RAID 1 or even "RAID 10" setup, depending
>>> on the specific situation, would also work well.
>>
>> For things that can fit on a single drive, software raid1 has the
>> advantage of letting you easily recover the data from any disk that
>> survives any kind of disaster, on any machine with a physically
>> compatible controller.  And if you can use a mount point layout that
>> distributes the load/activity across several raid sets your
>> real-world performance will probably be as good or better than
>> raid10 even if the 'big sequential file' benchmarks aren't as fast.
>>
> Would a hardware RAID 1 disk be recoverable without the hardware RAID
> controller?  I guess I'm asking if hardware RAID 1 is simply a mirror,
> or if the controllers do something funny to the drives which makes them
> unreadable without that controller.

It probably depends on the controller.  I'd expect to be able to move 
the drive(s) to an identical controller type but not necessarily a 
different brand.  They usually add something that lets them identify the 
drives but in the case of raid1 (only) you might have some chance of 
reading them on a non-raid controller.

-- 
   Les Mikesell
    lesmikesell at gmail.com