On 3/29/07 8:17 AM, "Eric Berna" <email@hidden> wrote:
> On 3/29/07 8:13 AM, "Ethan Murphy" <email@hidden> wrote:
>
>> Hi,
>>
>> Is it safe to partition and place the server OS on one of my three
>> drives that I will use for a RAID5 configuration on my XServe G5. I
>> know that if a drive goes down I can replace it and rebuild, but what
>> happens if the drive goes down that has my OS partition on it? Is
>> this the proper way to do it?
>>
>> My setup is 3 500GB drive in an XServe G5. There is a 20GB partition
>> for the OS and the rest is Megaraided together to give me just under
>> a TB of space.
>>
>> -Ethan
>
> Yes, it would work that way, but it would be safer to use a RAID 5
> partition. Since it's a hardware RAID the OS has no difficulty booting off
> a RAID 5 partition. Then you'll have the same RAID 5 features for your boot
> volume as you have for your data volume. If a drive goes down you can
> replace and rebuild without stopping the Xserve, regardless of which drive
> fails. Also, carving off one non RAID partition from one drive prevents the
> RAID controller from using that much space on the other two drive. So you'd
> have the same total space.
>
> I also have a Xserve G5, 3 500GB drives, and the hardware RAID controler. I
> run it with a RAID 5 partition for the OS and, and two RAID 5 partitions for
> data.
BTW, there are a couple of ways you could accomplish this, and I was told by
Apple support (early in the 10.4 days) that one of them could be seriously
problematic. You could:
1. Use 'megaraid' to make a single RAID 5 disk that takes up all your space,
then use Disk Utility to format it with 3 partions, or...
2. Use 'megaraid' to create 3 separate RAID 5 "configurations", then use
Disk Utility to format each one with a single partition.
Apple said go with option 2.
Matt
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