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@xxxxxxxxxxxx -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] 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@xxxxxxxxxxxx> 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@xxxxxxxxxxxx > > -----Original Message----- > From: redhat-list-bounces@xxxxxxxxxx > [mailto:redhat-list-bounces@xxxxxxxxxx] 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@xxxxxxxxxxxxxxx> 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@xxxxxxxx> 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 >> >> -- >> redhat-list mailing list >> unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe >> https://www.redhat.com/mailman/listinfo/redhat-list >> >> -- >> redhat-list mailing list >> unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe >> https://www.redhat.com/mailman/listinfo/redhat-list >> > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > Please note that we may monitor or record telephone calls, email traffic data and also the content of email for the purposes of security and staff training. 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