Volumes over 2 Terrabytes

Thu Jun 2 16:17:54 UTC 2011

Aside from what's already been mentioned, no. A colleague has an xfs
file system on the order of 84TB and it's doing just fine. You may
need to pay attention to the physical extent size of the volume grop
to make sure it will get you to the size of volume you need but that's
about it.

-C

On Thu, Jun 2, 2011 at 2:00 PM, Matty Sarro <msarro at gmail.com> wrote:
> Not to hijack, but is there any issue with using lvm and resizing a
> single FS above, say, 24TB with XFS? I am working on a storage
> solution and reading this thread has given me some concerns I'd like
> to get assuaged.
>
> On Thu, Jun 2, 2011 at 1:13 AM, Corey Kovacs <corey.kovacs at gmail.com> wrote:
>> Which is why the post about changing the block size was puzzling...
>>
>> At any rate, he needs to use multiple 2T volumes and LVM, or he needs
>> to use gpt as the disk label. Block size has nothing to do with his
>> original question.
>>
>> Both of these things have already been mentioned and he's probably got
>> the file system created and in use by know so I think this thread is
>> just about cooked.
>>
>> -C
>>
>> On Thu, Jun 2, 2011 at 1:24 AM, Paul Preston <Paul.Preston at proxar.co.uk> wrote:
>>> 4k is enough for fs up to 16TB...
>>>
>>> --
>>> Paul Preston
>>> Proxar IT Ltd. Registered in England and Wales: 6744401- VAT: 942985479
>>> Tubs Hill House, London Road, Sevenoaks, Kent, TN13 1BL
>>> Tel:  (+44) 0844 809 4335
>>> Fax: (+44) 01732 459 423
>>> Mob: (+44) 077 9509 3450
>>> Web: www.proxar.co.uk
>>> Email: paul.preston at proxar.co.uk
>>>
>>>
>>> -----Original Message-----
>>> From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com] On Behalf Of Corey Kovacs
>>> Sent: 02 June 2011 00:45
>>> To: General Red Hat Linux discussion list
>>> Subject: Re: Volumes over 2 Terrabytes
>>>
>>> As the link you present notes, going above a 4k block size requires something like an Alpha. x86 based systems use 4k because it's also the page size. The default is 4k, as good as it's going to get.
>>>
>>> -C
>>>
>>> On Thu, Jun 2, 2011 at 12:26 AM, Paul Preston <Paul.Preston at proxar.co.uk> wrote:
>>>> I would also suggest changing a block size. Please refer to
>>>> http://en.wikipedia.org/wiki/Ext3
>>>>
>>>> Kind regards,
>>>>
>>>> --
>>>> Paul Preston
>>>> Proxar IT Ltd. Registered in England and Wales: 6744401- VAT:
>>>> 942985479 Tubs Hill House, London Road, Sevenoaks, Kent, TN13 1BL
>>>> Tel:  (+44) 0844 809 4335
>>>> Fax: (+44) 01732 459 423
>>>> Mob: (+44) 077 9509 3450
>>>> Web: www.proxar.co.uk
>>>> Email: paul.preston at proxar.co.uk
>>>>
>>>> -----Original Message-----
>>>> From: redhat-list-bounces at redhat.com
>>>> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Corey Kovacs
>>>> Sent: 01 June 2011 23:39
>>>> To: General Red Hat Linux discussion list
>>>> Subject: Re: Volumes over 2 Terrabytes
>>>>
>>>> It may be that you are using fdisk to create the partitions which only uses an "msdos" disk label. If you have luns larger than 2TB, you need to use the "parted" tool and give the lun a "gpt" disk label. That will get you beyond 2TB for a single lun.
>>>>
>>>> Of course, as mentioned already, you could create a bunch of 2TB luns and tie them together via lvm. Either will work but the LVM method will be more flexible down the road.
>>>>
>>>> -C
>>>>
>>>> On Wed, Jun 1, 2011 at 11:26 PM, Bob Wickline <wick at bobwickline.com> wrote:
>>>>> You might want to rethink your strategy. I always limit myself to 8TB LUNs and create four (4) 2TB fdisk primary partitions and cat them together in an LVM volume. And then unless you are on RHEL6, you will need an XFS license to create that large of filesystem...
>>>>> --
>>>>> Sent from my Android phone with K-9 Mail. Please excuse my brevity.
>>>>>
>>>>> "Martini, Dave" <martini1 at llnl.gov> wrote:
>>>>>
>>>>> I'm running RHEL 5
>>>>> 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 x86_64 x86_64
>>>>> x86_64 On Intel Xeon CUP L5530.
>>>>>
>>>>> I'm setting up some Winchester storage with 16 terrabytes of space.
>>>>> When I create a 10 terrabyte Lun, the RHEL box only sees it as 2 terrabytes.
>>>>>
>>>>> Will the above Kernel/CPU allow for volumes greater than 2 terrabytes?
>>>>> Anyone have any tips on how to do this?
>>>>>
>>>>> Thank you.
>>>>> Dave Martini
>>>>> LLNL
>>>>>
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