Isn't it 2TB per RAID device (i.e. Linux block device) or 2TB in total? I have 28 36GB 15K drives and 28 18GB 15K drives. 36GB * 28 = 1008GB 18GB * 28 = 504GB Either way, that's below the 2TB limit. However, since I'm mirroring, it will effectively be ~750GB. But I would like to know if there is a 2TB *total* limit for ALL RAID devices (good information to know in advance :) ). I'm going to be running LVM on top of the resulting md device for snapshots as well. I have a Red Hat kernel (2.4.18-24) so I assume that the vfs-lock patch is already integrated since Red Hat offers LVM as an option in 7.3. I've tested snapshots on my small setup and it appears to work just fine with ext3 on LVM on software RAID. Thanks for the help, Andy. -----Original Message----- From: Mike Dresser [mailto:mdresser_l@windsormachine.com] Sent: Friday, February 21, 2003 10:50 AM To: Rechenberg, Andrew Cc: linux-raid@vger.kernel.org Subject: Re: Questions about VERY large software raid config On Fri, 21 Feb 2003, Rechenberg, Andrew wrote: > Basically I'm going to do a bunch of RAID1 mirrors (56 drives), RAID) > those in sets of 14 and then stripe those 4 into one big array. We want > to get the most spindles possible servicing disk requests and I wanted > to know if anyone has tried such a setup. How big are your drives? There's apparently a 2 TiB limit on raid sizes, there's even someone who has been asking if 12 x 160 or 13 x 160 is ok(sorry, I don't have an answer for said person) Mike - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
