newfs options for .75TB RAID 5 unit
darren david
darren at 3x3x3.org
Wed Oct 19 11:13:06 PDT 2005
Matt Virus wrote:
> darren david wrote:
>
>> hey all-
>>
>> in the somewhat pending case that i may not be able to retrieve my
>> data from RAID 5 unit, I'm wondering what my best option is for
>> blocksize on a .75TB RAID 5 volume. does the 64k RAID stripe size have
>> any impact on these figures? It was previously set to the default(
>> 16384 blocksize, 2048 fragment ) without any noticeable perf issues,
>> but i'm just wondering if, well, size matters? ;)
>>
>> thanks,
>> darren david
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>
> You shouldn't have any problems. Read about tunefs if you wish, it may
> help you.
>
> I have a 6x250gb array (1.25tb RAID5). FBSD 5.2.1 refused to support a
> filesystem larger than 1.0tb, so i chunked it into 2 partitions to get
> around that problem and then I mounted them back using mount_nullfs so
> it appears as though all dirs are on the same partition in a single
> directory. Not sure if the 1TB filesystem limit problem is unique to me
> or not, but you will be fine with your .75tb no question.
Coolness. What was /your/ blocksize for your filesystem, and why did you
choose it?
darren
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