Re: 3TB disk hassles

[Mark Watts <m.watts@eris.qinetiq.com>]

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> Howdy...
>
> After much banging of heads on walls, I am throwing in the towel and
> asking the experts ;-) ... To cut a long story short:
>
> Is it possible to make a 3TB disk work properly in Linux?
>
> Our "disk" is 12x300GB in RAID5 (with 1 hot-spare) on a 3ware 9500-S12,
> so it's actually 2.7TiB ish.  It's also /dev/sda - i.e., the one and
> only disk in the system.
>
> Problems are arising due to the 32-bit-ness of normal partition tables.
>  I can use parted to make a 2.7TB partition (sda4), and
> /proc/partitions looks fine until a reboot, whereupon the top bits are
> lost and the big partition looks like a 700GB partition instead of a
> 2.7TB one; this is a bad thing ;-)
>
> I've had my hopes raised by GPT, but after more reading it appears this
> doesn't work on vanilla x86 PCs.
>
> Tips gratefully received.
>
> Neil
>
> PS: not on-list; I'll be reading the real-time archivers, but CCs of
> any replies would be appreciated.

Are you sure your card supports creating a single volume in excess of 2TB? 
Some cards have such a limit, although you can create many 2TB volumes on the 
same card.

Mark.

- -- 
Mark Watts
Senior Systems Engineer
QinetiQ Trusted Information Management
Trusted Solutions and Services group
GPG Public Key ID: 455420ED

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