Quote:
Originally Posted by cereal83
We have a san with 4 GB of space and fdisk worked just fine on it. The 2.4 kernel can only see up to 2TB, with 2.6 kernel, you have to select an option under Block devices for "Support for Large Block Devices"
Brian, can I ask what raid controller you used because I tried that same exact thing with a Promise SX8300 and I could not get the kernel to detect it.
Thanks
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Interesting. For me, with a brand new Ubuntu install & 2.6 kernel, fdisk would only show enough blocks to fill 1.2TB. cfdisk would see all 3.5TB, but when asked to create a 3.5TB partition, it would act like it worked, but quitting out & returning still showed 1.2TB + lots of free space.
In any event, My hardware setup is this:
3Ware 9550SX-16ML (16 port, multi-lane) - attached to 133MHz 64-bit PCIx
Supermicro X6DHE-XG2 (motherboard)
Dual EM64T Xeons
the 3w-9xxx module was built into my kernel out of the box.
As an FYI: Some of the less expensive RAID cards - especially those from Promise - are just controller cards with no hardware 'acceleration'. They use words like "Hardware Assisted", but, in reality, the driver for the card controls the array, so you are, in effect, using a software RAID that's putting all the load on your CPU.
So there's a whole lot of info you didn't ask or care about.