[CentOS] software raid
jlb17 at duke.edu
Thu Mar 29 20:57:17 UTC 2007
On Thu, 29 Mar 2007 at 3:50pm, Les Mikesell wrote
> Joshua Baker-LePain wrote:
>>> The large SAN vendors usually don't recommend building raid5 sets larger
>>> than 6-8 disks, and will stripe or concatenate multiple of those on the
>>> typical SAN with 100s of spindles. Myself, I'll stick with RAID10 for
>>> anything critical.
>> Would that I had the money to and still get the space I need. Even doing 2
>> 12 disk RAID6 sets (each with a hot spare) gets you 9TB which is 50% more
>> space for the same money as RAID10.
> You are omitting the cost of the raid controller here. For your 12+ ports you
> don't have much other choice except a dedicated network device. For the size
What do you mean by a dedicated network device -- do you mean a NAS? Not
true. See, e.g.,
> that normal people need - or that you might use on other machines, you might
Are you implying I'm not normal? ;)
> have the option of running raid10 (or 0 + LVM) in software on the motherboard
> ports plus some dumb $20/port cards and buying several extra drives.
On that note, what cheap add-in SATA controllers have folks had good luck
with? I haven't tried *too* hard, but the couple I've tried were far less
There is one advantage of hardware RAID that hasn't been mentioned yet,
and that's hot-swap. Last time I tried, software RAID fell over when a
HDD suddenly disappeared.
Department of Biomedical Engineering
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