Andrew Haswell wrote:
Sorry i wasnt clear, the n2100 has 2 disk and i want to use LVM / RAID
to provide an area of RAID1 storage across both disks and and area of
raid0 storage such that 2x 500GB disks could yeald say 200GB R1 and
600GB R0 therefore not loosing 50% :-). Using LVM to divide the disks
into 50GB chunks so that disk can be reallocated if required. As i said
im new to linux so im not clear on how to do this exactly yet but want
to find out, the linux guys i work with say that i have some options.
If you're proposing to use LVM there would seem to be little point in
using RAID0 as well. Bear in mind that neither RAID0 nor LVM will
provide any redundancy in the event of a disc failure.
I'm not sure quite what you're after, but how about this as a starting
point:
Split each disc as follows:
/dev/sd?1 10G Root \
/dev/sd?2 2G Swap \ Adjust sizes to meet
/dev/sd?3 190G For raid 1 / your requirements
/dev/sd?4 298G For LVM /
Then configure each of the first three pairs as RAID1 and configure
/dev/sda4 and /dev/sdb4 as physical volumes in a large LVM volume group.
That way you get some redundancy for your system (one disc dying won't
take your system out) whilst giving you the flexibility to allocate
nearly 600G under LVM as you want (albeit without any redundancy).
I don't know what you intend to use the rest of the RAID1 area for, but
it might make sense to use LVM on top of RAID1 there, again for flexibility.
HTH
John
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