Here is what used to be: F210-> max of 14x4GB or 7x9GB disks F220-> same F230-> max of 28x4GB or 14x9GB disks F520-> max of 28x9GB disks F540-> max of 52x4GB disks F630-> max of 52x4GB or 52x9GB disks
All of these system are able to run pre-5.0 software. Before 5.0, there was no concept of multiple RAID groups. Filesystems that were upgraded to a newer release are "grandfathered"...i.e. we let all the disks in a single volume move forward, and in the case of a F540 or F630, that could mean, in a worst case, 51 data and 1 parity drive.
So, when the docs say "The maximum RAID group size is 52 disks.", that would be a grandfathered filesystem.
The default RAID group size if 14 disks, unless you tell it to use 28, or the filesystem already has more than 14 disks.
--tmac
I don't understand below statement in System Administration Guide pg 72-73 : what does it mean by "The maximum RAID group size is 52 disks." when "The largest RAID group size you can create manually is 28 disks."
I believe certain older systems & releases *may* have supported up to 52 disks but I'm not 100% certain. I definitely know it was at least 28 disks on the F330. The default is now 14 disks per raid group, and you can tweak this up to 28 disks per raid group but this isn't recommended due to the increase change of data loss due to the exposure to a double disk failure. There's a white paper on the NetApp web site tech library about this: http://www.netapp.com/tech_library/3027.html
Hope that helps, Luke.
-- Luke Mewburn lukem@netapp.com Systems Engineer, Network Appliance Melbourne, Australia Phone: +61 419 361 266, Fax: +61 3 9866 1011
-- ******All New Numbers!!!****** ************* *************
Timothy A. McCarthy --> System Engineer, Eastern Region Network Appliance http://www.netapp.com 240-268-2034 Office \ / Page Me at: 240-268-2001 Fax / 888-971-4468