newfs limits? 10TB filesystem max?
Eric Anderson
anderson at centtech.com
Wed Feb 16 22:00:38 GMT 2005
Claus Guttesen wrote:
>>I've just built an enormous 10TB filesystem. When
>>trying to newfs the disk, it bombed with something
>>like "cannot allocate memory" after something like
>>23xxxxxxxxx sectors.. I noticed disklabel complains
>>about disks with more than 2^32-1 sectors not being
>>supported..
>
>
> Aren't you supposed to use gpt(8) to define partitions
> larger than 2 TB?
No idea - this is the first I've heard of gpt really..
>>Is newfs supposed to be able to work? I've used the
>>-s option to newfs to limit my filesystem size to
>>the max it would allow, which ends up being
>>11350482546 1K blocks, which means I'm only losing a
>>couple GB, which is no sweat right now for me, but
>>if someone wanted a 20TB filesystem, they'd be
>>hosed.
>
>
> Then the question is whether newfs reads
> gpt-partitioned disks? From newfs(8):
>
> Before running newfs the disk must be labeled using
> bsdlabel(8).
>
> How did you create such a huge partition? Your
> question is quite interesting, I'm at a
> storage-solution which supports LUN's larger than 2.2
> TB.
I used vinum to stripe 6 2TB partitions connected to 2 fiber channel disk arrays. Vinum automatically does the bsdlabel part. I was merely wanting to see what bsdlabel had to say about the vinum disk (if anything).
Using newfs on it worked as long as I specified a smaller sector count.
Eric
--
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Eric Anderson Sr. Systems Administrator Centaur Technology
I have seen the future and it is just like the present, only longer.
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