[CentOS] Re: software raid
feizhou at graffiti.net
Thu Mar 29 16:44:44 UTC 2007
John R Pierce wrote:
>> One drawback is software raid wants a single ide device on each ide
>> This means buying an ide card (if you want more than two devices)
>> which doesn't
>> always play well with the rest of the system (4+ ide devices). Some
>> might have more than two ide channels, but I just opted for the cheap
>> ide card.
> thats easy. SATA. one device per channel. you can get 8 ports or more
> of SATA on a PCI-X or PCI-Express x4 card. parallel IDE is dead.
> except, I've never heard of any such limitation, other than the
> potential performance bottleneck.
One drive going down on a IDE channel can take the whole channel due to
the controller being confused or what not. This is why you get RAID
(real and fake) boards with 4 or more channels on which to connect a
single IDE drive.
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