On Oct 4, 2007, at 12:38 PM, Joshua Baker-LePain wrote:
On Thu, 4 Oct 2007 at 11:29am, David Miller wrote
The first is a bug in disk druid at install time. If you have a
Volume group with a logical volume larger than 2TB you can't edit
the default setup parameters in disk druid. For example I have a
Dell poweredge 2950 with 6x750GB in RAID5 using the parc 5/i. By
default these servers come configured with two virtual disks.
Using Red Hat's default layout it will use LVM and combine the two
disks into one volume group. this makes the root logical volume
about 3.5Tb. The size listed is not correct. It shows 3.57229e+06.
If you try to edit the logical volume name or group and click ok
it will say that the amount of space allocated is too large and
gives a range of 0 to 2TB. Even manually typing in the amount
shown as available(3574272) gives the same error. Of course if you
leave it alone it will format the volumes and work just fine.
The second bug is that if I use the perc 5/i and create one volume
of 3.5TB, RHEL5 will kernel panic during boot. I'm guessing that
RHEL5 cannot use physical drives over 2TB for the /boot or /
partition? Again I used Red Hat's default partition layout.
At this point, *no* distribution I know of can boot off of a device
>2TiB. That's because grub (and LILO, for that matter) does not
support devices with gpt disklabels, and you must use such a label
on a device that large.
As for Disk Druid, I don't know what it uses on the back end, but,
e.g., fdisk can handle >2TiB block devices either -- you have to
use parted.
Thanks Josh, Stephen, and Justin. I just made two equal sized virtual
drives in the perc5. In the installer I modified the / to only use
80GB. After the install I used Red Hat's GUI utility for logical
volume management to create another LV of 3.4TB and it worked fine. I
will report the disk druid problem to Red Hat.
Thanks again.
David.
--
Joshua Baker-LePain
QB3 Shared Cluster Sysadmin
UCSF
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