We're using 5.3.4R3. I'll be interested in hearing about your cautionary note regarding the usage of full disks or not. I'm pretty sure it's okay, though, because striping requires a parity drive and each RAID has its own parity drive. I don't see how WAFL can stripe across several RAIDs and properly maintain parity.
July
John Denholm wrote:
From July at Zerowait on Tue, 28 Mar 2000 15:52:57 EST:
Hello: The filer in question is an inherited box, an F760 with two shelves of 9GB SCSI drives, one shelf of 9GB FC-AL drives all in one RAID and one VOL. The single VOL also contains the root, I think. I've heard that you are supposed to separate SCSI and FC-AL drives into separate RAID groups, but this is how the box came and we can't change it.
Anyway, my task is to add two shelves of 36GB drives to this unit. I know I need to create a separate RAID group for the 36GB drives. In the man pages I see instructions for adding disks to an existing volume and how to create a volume. I don't see anything that tells me how to create a new RAID group. I must be missing something obvious.
July, (cool name :)
A cautionary word...
Someone from Netapp could perhaps address this one. I'm not sure you'll get the full 36G out of your drives!
I know it always used to be the case that if you had different raid sets with different size drives in the raid sets, as long as the set was all the same size, it didn't matter, all disks were fully used. This was because WAFL used to round-robin between raid sets for writes.
I heard a whisper that this wasn't the case any more, that now it fully striped across ALL raid sets. Can someone from Netapp jump in with an AWOOGAH or an all clear?
So, what version of ONTAP are you running there July?
J
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